All Wiring Diagrams for Lexus LS 430 2003

AIR CONDITIONING

Automatic A/C Wiring Diagram, Front (1 of 2) for Lexus LS 430 2003

List of elements for Automatic A/C Wiring Diagram, Front (1 of 2) for Lexus LS 430 2003:

(at right kick panel) passenger side j/b
(at right side of shift lever)
(at right side of shift lever) ii
A/c
A/c control assembly (behind right side of dash)
A/c fuse 7.5a
A/c pressure sensor (on left front of engine compt)
A/c room
A/c room temp switch (passenger)
A/c solar sensor (front) (behind upper center of dash)
A/c solar sensor (rear) (w/ rear cooler) (near center of rear speaker shelf)
A11
A12
Acc
Atx+
Atx-
Audio & rear a/c control switch (w/ rear audio controller)
Blower motor (behind lower right side of dash)
Blw
Clock (w/o navigation)
Combination meter
Computer data lines system
Defogger system
Dgs
Dome fuse 10a
Down
Driver side j/b (at left kick panel)
Ds1
Ds2
Ds3
Ds4
Dual
Duind+
Duind-
Drdn
Drgnd
Drup
E13
E14
E16
E17
Eb (under fusible link block)
F11
F12
F15
Fusible link block (on right rear of engine compt)
G j13
Gateway ecu (behind left end of dash)
Gauge fuse 10a
Gnd
Gtx+
Gtx-
Heater control switch (center cluster integration panel) (w/o navigation)
Heater control switch (multi-display) (w/ navigation)
Heater fuse 50a
Hot at all times
Hot in on or acc
Hot in on or start
Ig+
Ik (at right side of firewall)
Ill+
Ill-
Ind+
Ind-
Instrument panel register
Interior lights system
J12
J12 g
J13
J13 h
J14 g
J15 g
J16 c
J17 c
Junction connector (behind upper center of dash)
Junction connector 12, junction connector 13 (behind upper center of dash)
Junction connector 14, junction connector 15 (behind upper center of dash)
Junction connector 16, junction connector 17 (behind upper center of dash)
Mpi1
Mpi2
Mpx+
Mpx-
Mpx-b2 fuse 7.5a
Mpx-ig fuse 7.5a
Mtx+
Mtx-
P-acc fuse 7.5a
P-ig fuse 7.5a
Passenger side j/b (at right kick panel)
Pnk
Prs
Ps+b
Ps1
Ps2
Ps3
Ps4
Padn
Pagnd
Paup
Radio & player
Rdfgr
Red
Rtx+
Rtx-
S28
S29
S5-2
S5-4
Sol+
Sol-
Solenoid (on right side of engine)
Stereo component amplifier (on right side of luggage compt, behind trim)
Stereo component tuner (on lower right side of luggage compt)
Tamo
Tamout
Temp switch (driver)
Tsdr
Tsl
Tspa
Tsr
Tsrr
Tx+
Tx-
Txs+
Txs-
W/ navigation
W/o navigation

Automatic A/C Wiring Diagram, Front (2 of 2) for Lexus LS 430 2003

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List of elements for Automatic A/C Wiring Diagram, Front (2 of 2) for Lexus LS 430 2003:

(at left radiator side support) ec
(near ecm, in protective case) junction connector 1
+b1
A/c ambient
A/c comp relay
A/c control assembly (behind right side of dash)
A/c evaporative temperature sensor
A/c ig fuse 7.5a
A/c magnetic clutch & lock sensor (on right side of engine)
A/c room temperature sensor (behind left center of dash)
A13
Abodr
Abopa
Absdr
Abspa
Acmg
Aif
Air
Air inlet control servo motor
Air mix control servo motor (driver)
Air mix control servo motor (passenger)
Air vent mode control servo motor (driver)
Air vent mode control servo motor (passenger)
Amdb
Amdr1
Amdr2
Amdr3
Amdr4
Ampb
Ampa1
Ampa2
Ampa3
Ampa4
Aodb
Aodr1
Aodr2
Aodr3
Aodr4
Aopb
Aopa1
Aopa2
Aopa3
Aopa4
C-gnd
Computer data lines system
Cool air bypass servo motor (driver)
Cool air bypass servo motor (passenger)
Cooling fan ecu (on front center of engine compt, on radiator support)
D-sig
Duct sensor (driver) (behind upper left side of dash)
Duct sensor (passenger) (behind upper right side of dash)
Ed (at top left of firewall)
Ef (at left side of cylinder head)
Engine control module (on left front of engine compt, in protective case)
Engine room 1 j/b (on left front of engine compt, behind headlight)
Etam
Exhaust gas sensor (on right side of engine, on exhaust system)
Fan fuse 50a
Fan relay
Fr ig fuse 7.5a
Frs
Fusible link block (on right rear of engine compt)
Gnd
Hot at all times
Hot in on or start
Jinction connector (below engine room 1 j/b & engine room 1 r/b)
Junction connector 3 (near engine control module, in protective case)
Junction connector 4 (near engine control module, in protective case)
Junction connector 7 (below engine room 1 j/b c & engine room 1 r/b)
Lcki
Magnetic field sensor (w/ compass) (behind center of dash)
Mopen
Mpx1
Mpx2
Mshut
Nca
Nox
Open
Pnk
Rec
Red
Rfc
S5-3
S5-5
Sg-1
Sg-2
Sg-3
Sg-4
Sg-5
Sg-7
Shield
Short connector s1, s2
Shut
Tam
Tel1
Telephone transceiver & speaker relay (w/ lexus link system: on right side of luggage compt) (w/o lexus link system: on left side of luggage compt)
Telin
Temperature sensor (behind left side of bumper fascia)
Tfacedr
Tfacepa
Tpbdr
Tpbpa
Tpi
Vmid
Water valve servo motor
Wvig
Wvo
Wvs

Automatic A/C Wiring Diagram, Rear for Lexus LS 430 2003

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List of elements for Automatic A/C Wiring Diagram, Rear for Lexus LS 430 2003:

(+)
(-)
(at left rear quarterpanel)
(at right kick panel) passenger side j/b
(in dash harness, behind passenger's side air bag)
(w/ cooler) rear magnetic valve
A/c control assembly (behind right side of dash)
A/c fuse 7.5a
A/c solar sensor (rear) (near center of rear speaker shelf, at base of rear window)
A11
A12
Acc
Atx+
Atx-
Audio & rear a/c control switch
Auto
C11
Combination meter
Computer data lines system
Cool box illum
Dio
Dome fuse 10a
Driver side j/b (at left kick panel)
E13
E16
E17
Exo
F j15
F11
F12
F13
F15
Frs
Fusible link block (on right rear of engine compt)
G j13
Gateway ecu (behind left end of dash)
Gauge fuse 7.5a
Gnd
Gtx+
Gtx-
H j14
Heater control switch (center cluster integration panel) (w/o navigation)
Heater control switch (multi-display) (w/ navigation)
Hic
Hot at all times
Hot in on or acc
Hot in on or start
Ig+
Ii (at right side of shift lever)
J12
J12 g
J13
J13 h
J16 c
J17
Junction connector 10 (behind upper center of dash)
Junction connector 12, junction connector 13 (behind upper center of dash)
Junction connector 14, junction connector 15 (behind upper center g
Junction connector 16, junction connector 17 (behind upper center of dash)
Junction connector 23 (rearward of left rear fenderwell)
L14
Lug j/b fuse 50a
Luggage room j/b (on left side of luggage compt)
Luggage room j/b ecu
Mpi1
Mpi2
Mpl1
Mpx+
Mpx-
Mpx-b
Mpx-b2 fuse 7.5a
Mpx-b3 fuse 7.5a
Mpx-ig
Mpx-ig fuse 7.5a
Mtx+
Mtx-
Of dash)
P-acc fuse 7.5a
P-gnd
P-ig fuse 7.5a
Passenger side j/b (at right kick panel)
R-b
Radio & player
Rauto
Rdo
Rear a/c amplifier
Rear a/c unit (on left side of luggage compt)
Rear blower motor
Rear blower resistor
Rear damper servo motor
Red
Rfr
Rhi
Rhr
Rlo
Rmgv
Rr a/c fuse 7.5a
Rr ecu-b fuse 7.5a
Rso
Rtx+
Rtx-
S28
S29
S5-4
Sfrs
Smok
Smoke sensor
Stereo component amplifier (on right side of luggage compt, behind trim)
Stereo component tuner (on lower right side of luggage compt)
Tsrr
Tx+
Tx-
Txs+
Txs-
W/ cooler
W/ nav
W/ navigation
W/o cooler
W/o nav
W/o navigation

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Lexus LS 430 2003:

(under fusible link block)
+bi
+bm
Abs & trac & vsc actuator (on left rear of engine compt, near brake master cylinder)
Abs 1 fuse 40a
Abs 2 fuse 40a
Abs 3 fuse 7.5a
Abs motor relay
Abs sol relay
Ast
Brake fluid level warning switch (on master cylinder reservoir)
Computer data lines system
Eb (under fusible link block)
Ec (at left radiator side support)
Eng+
Eng-
Engine control module (on left front of engine compt, in protective case)
Engine room 3 r/b (on left rear of engine compt)
Fl+
Fl-
Flo
Fr+
Fr-
Fro2
Fss
Fusible link block (on right rear of engine compt)
Gnd
Gnd1
Gnd2
Gnd3
Gnd4
Headlight beam level control ecu (behind right side of dash)
Hot at all times
Junction connector 3 (near engine control module, in protective case)
Lbl-
Left front abs speed sensor
Master cylinder pressure sensor
Mpx1
Mpx2
Mr2
Nca
Neo
Pmc
Pnk
Pps solenoid (on left front of engine compt)
R1+
R2+
Red
Right front abs speed sensor
S10
S13
Sflh
Sflr
Sfrh
Sfrr
Skid control ecu (behind left side of dash)
Smc1
Smc2
Smv1
Smv2
Sol+
Sol-
Spdl
Spdr
Srcf
Srcr
Srlh
Srlr
Srmf
Srmr
Srrh
Srrr
Trc+
Trc-
Vcm

Anti-lock Brakes Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Lexus LS 430 2003:

(at left side of dash) ig
+bo
Abs ind
Abs-ig fuse 7.5a
Air suspension ecu (w/ electronic modulated air suspension) (behind right side of dash)
Bat
Brake pedal load sensing switch (on brake pedal bracket, above brake pedal)
Chs+
Chs-
Combination meter
Computer data lines system
Cpu
Csw
D/g
Data link connector (dlc) 3 (below left side of dash)
Dome fuse 10a
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
E10
E13
E14
E16
Ess
Fro
Fsw+
Fsw-
Gauge fuse 7.5a
Ggnd
Gl1
Gl2
Gyaw
Hot at all times
Hot in on or start
Ig1
Ih (at right side of shift lever)
Ik (at right side of firewall)
J12
J13
J16
J17
Junction connector (behind upper center of dash)
Junction connector 12 & 13 (behind upper center of dash)
Junction connector 16 & 17 (behind upper center of dash)
Left rear abs speed sensor
Mpx-b2 fuse 7.5a
Mpx1
Mpx2
Nca
Parking brake switch (behind left end of dash, on parking brake mechanism)
Passenger side j/b (at right kick panel)
Pkb
Pnk
Red
Right rear abs speed sensor
Rl+
Rl-
Rr+
Rr-
S11
S12
Skid control ecu (behind left side of dash)
Slip ind
Sp1
Speedo- meter
Ss1+
Ss1-
Steering sensor (inside top of steering column)
Stop fuse 5a
Stoplight switch (above brake pedal, on bracket)
Stp
Traction control switch
Trig
Vgs
Vsc off ind
Vsc warning buzzer (behind lower left side of dash)
Vys
Yaw
Yaw rate sensor (below rear of center console)
Yaw2
Yss

ANTI-THEFT

Anti-theft Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for Anti-theft Wiring Diagram (1 of 2) for Lexus LS 430 2003:

(16-19 not used pins)
(25-27 not used pins)
(6-10 not used pins)
(at right side of shift lever) ih
+b1
+b2
A j10
Acc
Air bag sensor assembly (behind lower center of dash, on transmission tunnel)
B j15
Bdr
Bzr
Bzr2
Bzr3
Bzrg
Cpse
Cpub
Cty
D-acc fuse 7.5a
D24
D25
Data
Dle
Door lock control receiver (inner mirror)
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
E j11
E10
E11
Engine room 2 r/b (on left front of engine compt, behind headlight)
F11
F16
F17
F18
Front controller
Front passenger door ecu (inside right front door)
Gateway ecu (behind left end of dash)
Ground
Gsw
Hot at all times
Hot in on or start
I15
I19
Ii (at right side of shift lever)
Ill+
Ind
Ind2
J/c 10 & 11 (behind upper center of dash)
J/c 14 & 15 (behind upper center of dash)
J/c 21 (forward of left rear fenderwell)
J/c 27 (forward of right rear fenderwell)
J14
Keyless buzzer (inside top of left front fender, near base of ``a" pillar)
Keyless buzzer on/off switch
Kul
Left front door courtesy switch
Left front door lock motor
Lsw
Mpd1
Mpd2
Mpl1
Mpl2
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Mul
Passenger side j/b (at right kick panel)
Pct
Pnk
Power window master switch
Pwe
Pws
Rc0
Rda
Red
Right front door courtesy switch
Right front door lock control switch
Right front door lock motor
Rssi
Security fuse 7.5a
Security indicator light
Sh-
Sig
Theft deterrent ecu (behind upper right center of dash)
Theft deterrent horn (on right rear of engine compt)
W/l
Warning system
Wls1
Wlsw

Anti-theft Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for Anti-theft Wiring Diagram (2 of 2) for Lexus LS 430 2003:

(at left radiator side support) ec
(behind upper center of dash) transponder key computer
(on right side of steering column) transponder key amplifier
Agnd
Ant1
Ant2
Bdr
Bu-
Bubs
Code
Coil
Cpse
Cpub
Cty
D door fuse 25a
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
E18
Efii
Efio
Engine control module (on left front of engine compt, in protective case)
Engine hood courtesy switch (on front center of engine compartment)
F17
G10
Gnd
Ground
Hdcy
Headlights system
Hot at all times
Hot in on or start
Hrly
I10
I13
I19
I21
I22
Ig2
Ig2 fuse 7.5a
Ih (at right side of shift lever)
Imi
Imo
J/c 10 & 12 (behind upper center of dash)
J/c 12 & 13 (behind upper center of dash)
J/c 21 (forward of left rear fenderwell)
J/c 23 (rearward of left rear fenderwell)
J/c 24 (on left rear of luggage compt lid)
J/c 27 (forward of right rear fenderwell)
J/c 30 (rearward of right rear fenderwell)
J/c 7 (below engine room 1 j/b & engine room 1 r/b)
J10
J11
J12
J13
Key
Ksw
L12
L14
Left rear door courtesy switch
Left rear door ecu (inside left rear door)
Left rear door unlock motor
Lh rr door fuse 20a
Lsw
Luggage compartment door key unlock switch
Luggage room j/b
Luggage room j/b ecu (on left side of luggage compartment)
Mpx-
Mpx-b1 fuse 7.5a
Mpx1
Mpx2
P door fuse 25a
P-gnd
Passenger side j/b (at right kick panel)
Pcti
R13
R14
Red
Rh rr door fuse 20a
Right rear door courtesy switch
Right rear door ecu (inside right rear door)
Right rear door unlock motor
Rxck
Sel1
Sig
Tkul
Txct
Vc12
Warning system

BODY CONTROL MODULES

Driver Side J/B ECU Wiring Diagram for Lexus LS 430 2003

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List of elements for Driver Side J/B ECU Wiring Diagram for Lexus LS 430 2003:

(w/ compass)
(w/o compass)
Acc
Am1 fuse 7.5a
Anti-lock brakes system
Anti-theft system
B/anc
Bes
Bklr
Bu+
Bu-
Cltb
Clte
Clts
Computer data lines system
D b/anc fuse 5a
Dbil
Dbkl
Dbm+
Dmb-
Driver side j/b (at left kick panel)
Driver side j/b ecu
E17
Engine controls system
Exterior lights system
Fuel
Gnd
Gnd2
Haz
Haz fuse 15a
Hdcl
Hdcy
Head
Headlights system
Hot at all times
Hot in run or start
Hrly
Ig (at left side of dash)
Ignition switch
Ih (at right side of shift lever)
Instrument cluster system
Interior lights system
J/c 12 & 13 (behind upper center of dash)
J/c 14 & 15 (behind upper center of dash)
J12
J13
J14
J15
Lock
Mind
Mirrors system
Mpx-b
Mpx-b3 fuse 7.5a
Mpx-ig
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Mpx3
Msw
Panel fuse 7.5a
Panel1
Panel2
Passenger side j/b (at left kick panel)
Passenger side j/b (at right kick panel)
Passenger side j/b ecu
Passive restraint system
Pnk
R/e
Red
Ret
Rtr
Run
Shift interlock system
Start
Stp
Stpa
Stpi
Stpo
Sw1
Sw2
Sw3
Tr+
Tr1
Tr2
Tr3
Trunk, tailgate, fuel doors system
Tsw
Turn lh
Turn rh
Warning system
Wiper/washer system

Front Controller Wiring Diagram for Lexus LS 430 2003

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List of elements for Front Controller Wiring Diagram for Lexus LS 430 2003:

C12
Computer data lines system
Cral
Crar
Driver side j/b (at left kick panel)
Engine room 1 r/b (on left front of engine compt, behind headlight)
Engine room 2 r/b (on left front of engine compt, behind headlight)
Exterior lights system
Ffog
Fhhi
Fhor
Fmb3
Fmig
Fogl
Fogr
Fr fog fuse 15a
Front controller
Ftal
Fwas
H-lp hi fuse 20a
Headlights system
Hlhl
Hlhr
Horh
Horl
Horn (high)
Horn (low)
Horn fuse 10a
Hot at all times
Hot in on or start
Ig (at left side of dash)
Mpx-b3 fuse 7.5a
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Passenger side j/b (at right kick panel)
Red
Sidl
Sidr
Tail fuse 7.5a
Washer fuse 20a
Wiper/washer system
Wlvl

Luggage Room J/B ECU Wiring Diagram for Lexus LS 430 2003

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List of elements for Luggage Room J/B ECU Wiring Diagram for Lexus LS 430 2003:

(rearward of left rear fenderwell) j/c 23
(rearward of left rear fenderwell) j/c23
Acc
Air conditioning system
Auto
B11
Bck1
Bdcy
Bk/up
Bq (at right rear seat back)
Bubs
Computer data lines system
Driver side j/b (at left kick panel)
Exterior lights system
F12
F13
Frs
Fsme
Fsms
Fsmv
Fsse
Fsss
Fssv
Fuel opn fuse 10a
Fuel opn(o)
Fuel opn(p)
Fusible link block (on right rear of engine compt)
Hic
Hot at all times
Hot in on or start
Instrument cluster system
Interior lights system
L-o/c(p)
L12
L13
L14
Lce1
Lcls
Lcm+
Lcm-
Lcty
Left rear buckle switch (w/ rear power seat) (inside of left rear seat belt buckle)
Lgcy
Lglp
Lopn
Lug j/b fuse 50a
Luggage room j/b (on left side of luggage compt)
Luggage room j/b ecu
Mpx
Mpx+
Mpx-
Mpx-b
Mpx-b3 fuse 7.5a
Mpx-ig
Mpx-ig fuse 7.5a
Navigation system
P-gnd
Passenger side j/b (at
Power distribution system
Power distribution system
Power tops system
Power windows system
Rbil
Red
Rfr
Rhr
Right kick panel)
Right rear buckle switch (w/ rear power seat) (inside of right rear seat belt buckle)
Rmgv
Rsc
Rss
Smok
Stop1
Stop2
Stp1
Stp2
Stp3
Tail1
Tail2
Til1
Til2
Til3
Til4
Tkul
Trunk, tailgate, fuel doors system

Passenger Side J/B ECU Wiring Diagram for Lexus LS 430 2003

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List of elements for Passenger Side J/B ECU Wiring Diagram for Lexus LS 430 2003:

Acc
Airbag
Altl
Am1 fuse 7.5a
B/anc
Back
Bkll
Computer data lines system
Cspt
Driver side j/b (at left kick panel)
E17
Engine room 1 r/b (on left front of engine compt, behind headlight)
Fspt
Gnd
Gnd1
Hdlv
Headlights system
Hot at all times
Hot in on or start
Ignition switch
Ii (at right side of shift lever)
Ik (at right side of dash)
Ile
Instrument cluster system
Interior lights system
Lcty
Lock
Memory & wiper/washer systems
Mpx-
Mpx-b
Mpx-b2 fuse 7.5a
Mpx-ig
Navigation system
P b/anc fuse 5a
Passenger side j/b (at right kick panel)
Passenger side j/b ecu
Passive restraint system
Pbil
Pbm+
Pbm-
Pind
Pnk
Pwr
Rcty
Rrsw
Run
S/m
S/s
Snow
Start
Transmissions system
Warning system
Wip
Wip fuse 30a
Wiper/washer system
Wng

COMPUTER DATA LINES

Data Link Connector Wiring Diagram for Lexus LS 430 2003

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List of elements for Data Link Connector Wiring Diagram for Lexus LS 430 2003:

(at left kick panel) driver side j/b
(at right side of shift lever) ih
(behind lower center of dash, on transmission tunnel) air bag sensor assembly
(below left side of dash) data link connector (dlc) 3
A21
A24
Air suspension ecu (behind right side of dash)
B j3
B j4
Bat
C12
C15
Combination meter
D/g
Ef (on left cylinder head)
Engine control module (on left front of engine compt, in protective case)
F16
Gateway ecu (behind left side of dash)
Hot at all times
J/c 12 & 13 (behind upper center of dash)
J/c 16 & 17 (behind upper center of dash)
J/c 3 & 4 (near engine control module, in protective case)
J12
J13
J16
J17
Multi- display
Obd fuse 7.5a
Opb
S11
Sil
Skid control ecu (behind left side of dash)
Tac
Tach
Wfse

High/Low Bus Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for High/Low Bus Wiring Diagram (1 of 2) for Lexus LS 430 2003:

(at right side of shift lever) ih
(behind left side of dash) data link connector (dlc) 3
(behind upper center of dash) j/c 12 & 13
Acc
Atx+
Atx-
Batt
Bu+
Bu-
Bubs
C13
C14
C17
Center cluster integration panel
Clearance sonar ecu (on left side of luggage compt)
Combination switch
D-acc fuse 7.5a
D28
Driver seat ecu (below left side of driver's seat)
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
E16
Engine room 2 r/b (on left front of engine compt, behind headlight)
F11
F18
Front controller
Gateway ecu (behind left end of dash)
Gnd
Gtx+
Gtx-
Hot at all times
Hot in on or acc
Hot in on or start
I14
J/c 10 & 11 (behind upper center of dash)
J/c 31 (w/ rear power seat) (behind left rear seat back)
J10
J11
J12
J13
L14
Left rear seat ecu (behind left rear seat back)
Luggage room j/b ecu (on left side of luggage compt)
Mpd1
Mpd2
Mpi1
Mpi2
Mpl1
Mpl2
Mpx
Mpx+
Mpx-
Mpx-b2 fuse 7.5a
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Mpx3
Multi- display
Passenger side j/b (at right kick panel)
Power tilt & power telescopic ecu (behind left side of dash)
R25
R27
Radio & player
Rear seat control switch
Red
Sil
Theft deterrent ecu (behind upper right center of dash)
Transponder key computer (behind upper center of dash)
Tx+
Tx-
Tx1
Txs+
Txs-
W/ navigation
W/ park assist
W/o navigation
Wfse

High/Low Bus Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for High/Low Bus Wiring Diagram (2 of 2) for Lexus LS 430 2003:

A/c control assembly (behind right side of dash)
A11
A24
Air bag
Air bag sensor assembly (behind lower center of dash, on transmission tunnel)
Combination meter
Cpu
D25
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
E10
E11
Engine control module (on left front of engine compt, in protective case)
F13
F17
F18
Front passenger door ecu (inside right front door)
I18
Left rear door ecu (inside left rear door)
Moon roof control ecu (at front of roof opening)
Mpx
Mpx+
Mpx-
Mpx1
Mpx2
Overhead j/b (at front of roof opening)
Passenger side j/b (at right kick panel)
Passenger side j/b ecu (at right kick panel)
R13
R14
R26
Rain sensor (near top center of windshield)
Right rear door ecu (inside right rear door)
Right rear seat ecu (behind right rear seat back)
S12
Skid control ecu (behind left side of dash)
T15
Telephone transceiver & speaker relay (on right side of luggage compt)
W/ link system
W/ moon roof
W/ rain sensor
W/ rear power seat

COOLING FAN

Cooling Fan Wiring Diagram for Lexus LS 430 2003

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List of elements for Cooling Fan Wiring Diagram for Lexus LS 430 2003:

(at left radiator side support) ec
+b1
A/c comp relay
A/c control assembly (behind right side of dash)
A/c fuse 7.5a
A/c ig fuse 7.5a
A/c magnetic clutch & lock sensor (on right side of engine)
A11
Acc
Acmg
Computer data lines system
Cooling fan ecu (on front center of engine compt, on radiator support)
Driver side j/b (at left kick panel)
E14
E17
Ed (at top left of dash)
Ef (on left cylinder head)
Engine control module (on left front of engine compt, in protective case)
Engine coolant temperature sensor (on front center of engine)
Engine room 1 j/b (on left front of engine compt, behind headlight)
Ethw
F12
Fan fuse 50a
Fan relay
Fr ig fuse 7.5a
Fusible link block (on right rear of engine compt)
Gnd
Hot at all times
Hot in on or acc
Hot in on or start
Ik (at right side of dash)
J14
J15 g
Junction connector 1 (near engine control module, in protective case)
Junction connector 14, junction connector 15 (behind upper center of dash)
Junction connector 3 (near engine control module, in protective case)
Junction connector 4 (near engine control module, in protective case)
Junction connector 7 (below engine room 1 j/b & engine room 1 r/b)
Lcki
Mpx+
Mpx1
Mpx2
P-acc fuse 7.5a
P-ig fuse 7.5a
Passenger side j/b (at right kick panel)
Rfc
Short connector s1, s2
Thw

CRUISE CONTROL

Cruise Control Wiring Diagram, with Dynamic Laser Controls (1 of 2) for Lexus LS 430 2003

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List of elements for Cruise Control Wiring Diagram, with Dynamic Laser Controls (1 of 2) for Lexus LS 430 2003:

(in engine harness, under ecu box) e1
+b1
+bm
Accel position sensor (behind left center of dash)
At4
Batt
C10
C15
Cancel
Cchg
Ccs
Combination switch
Computer data lines system
Cruise
Cruise control switch
D position switch (park/neutral position switch)
Distance control ecu (behind right side of dash)
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
E9 (in engine harness, under engine room 1 j/b)
Ec (at left radiator side support)
Ef (on left side of cylinder head)
Efi 1 fuse 30a
Efi main relay
Elc
Eng+
Eng+ neo eng-
Eng-
Engine control module (on left front of engine compt, in protective case)
Engine room 1 r/b (on left front of engine compartment, behind headlight)
Ep1
Ep2
Epa
Eptk
Etcs fuse 10a
F16
Fr ig fuse 7.5a
Gnd
Hot at all times
Hot in on or start
Igb
Ign fuse 7.5a
Igsw
Junction connector 1 & 2 (near engine control module, in protective case)
Junction connector 1 & 2 j2 (near engine control module, in protective case)
Junction connector 3 (near engine control module, in protective case)
Junction connector 7 (below engine room j/b 1 & engine room r/b 1)
Laser radar sensor (behind right side of front bumper fascia)
Lcs
Lgnd
Lrdd
Lrrd
Mode
Mpx1
Mpx1 mpx2 s12
Mpx2
Mrel
Neo
Nssd
Obd fuse 7.5a
Passenger side j/b (at right kick panel)
Pnk
Red
Res/ acc
S13
S2 short conn
Set/ coast
Sgnd
Shift lock control ecu (below shift lever, in center console)
Short conn
Sil
Skid control ecu (behind left side of dash)
St1-
Stop fuse 5a
Stoplight switch (on brake pedal bracket)
Stp
Stpi
Stpo
Trc+
Trc+ trc- s10
Trc-
Ts sp1 s11
Vcp1
Vcp2
Vcpa
Vpa
Vpa1
Vpa2
Vptk
Wfse

Cruise Control Wiring Diagram, with Dynamic Laser Controls (2 of 2) for Lexus LS 430 2003

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List of elements for Cruise Control Wiring Diagram, with Dynamic Laser Controls (2 of 2) for Lexus LS 430 2003:

(at right side of shift lever)
(below left side of dash) data link connector (dlc) 3
(near engine control module, in protective case) junction connector 3 & 4
Bat
Center of dash)
Combination meter
Computer data lines system
Cpu
Cruise ind
Dome fuse 10a
Driver side j/b (at left kick panel)
E01
E02
E03
E13
E16
E19
Ee (on right side of cylinder head)
Ef (on left side of cylinder head)
Engine control module (on left front of engine compt, in protective case)
Eoil
Eta
F15
Gauge fuse 7.5a
Ge01
Hot at all times
Hot in on or start
Ih (at right side of shift lever)
J16
J17
Junction connector 10 (behind upper center of dash)
Junction connector 12 (behind upper
Junction connector 13 (behind upper center of dash)
Junction connector 16 & 17 (behind upper center of dash)
Junction connector 5 (near engine control module, in protective case)
Me01
Mpx-b2 fuse 7.5a
Oil
Passenger side j/b (at right kick panel)
Red
Shielded
Sil
Sln+
Sln-
Slt+
Slt-
Slu+
Slu-
Sp2+
Sp2-
Speedometer
Throttle control motor (on front of engine, on throttle body)
Throttle position sensor (on throttle body)
Transmissions system
Vehicle speed sensor (on transmission)
Vta
Vta2
Wfse

Cruise Control Wiring Diagram, without Dynamic Laser Controls (1 of 2) for Lexus LS 430 2003

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List of elements for Cruise Control Wiring Diagram, without Dynamic Laser Controls (1 of 2) for Lexus LS 430 2003:

(in engine harness, under ecu box)
(near engine control module, in protective case) junction connector 3
+b1
+bm
Accel position sensor (behind left center of dash)
At4
Batt
C10
C15
Cancel
Ccs
Combination switch
Computer data lines system
Cruise
Cruise control switch
D position switch (park/neutral position switch)
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
E9 (in engine harness, under engine room 1 j/b)
Ec (at left radiator side support)
Efi 1 fuse 30a
Efi main relay
Egn-
Eng+
Eng-
Engine control module (on left front of engine compt, in protective case)
Engine room r/b 1 (on left front of engine compartment, behind headlight)
Ep1
Ep2
Epa
Eptk
Etcs fuse 10a
F16
Fr ig fuse 7.5a
Hot at all times
Hot in on or start
Ign fuse 7.5a
Igsw
J1 junction connector 1 & 2 (near engine control module, in protective case)
Junction connector 1 & 2 (near engine control module, in protective case)
Junction connector 7 (below engine room 1 j/b & engine room 1 r/b)
Mpx1
Mpx2
Mrel
Neo
Nssd
Obd fuse 7.5a
Passenger side j/b (at right kick panel)
Pnk
Red
Res/ acc
S10
S11
S12
S13
S2 short connector
Set/ coast
Shift lock control ecu (below shift lever, in center console)
Sil
Skid control ecu (behind left side of dash)
Sp1
St1-
Stop fuse 5a
Stoplight switch (above brake pedal, on bracket)
Stp
Stpi
Stpo
Trc+
Trc-
Vcp1
Vcp2
Vcpa
Vpa
Vpa1
Vpa2
Vptk
Wfse

Cruise Control Wiring Diagram, without Dynamic Laser Controls (2 of 2) for Lexus LS 430 2003

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List of elements for Cruise Control Wiring Diagram, without Dynamic Laser Controls (2 of 2) for Lexus LS 430 2003:

(below left side of dash) data link connector (dlc) 3
(on right side of cylinder head)
Bat
Combination meter
Computer data lines system
Cpu
Cruise ind
Dome fuse 10a
Driver side j/b (at left kick panel)
E01
E02
E03
E13
E16
E19
Ef (on left side of cylinder head)
Engine control module (on left front of engine compt, in protective case)
Eoil
Eta
F15
Gauge fuse 7.5a
Ge01
Hot at all times
Hot in on or start
Ih (at right side of shift lever)
Ii (at right side of shift lever)
J16
J17
Junction connector 10 (behind upper center of dash)
Junction connector 12 (behind upper center of dash)
Junction connector 13 (behind upper center of dash)
Junction connector 16 & 17 (behind upper center of dash)
Junction connector 3 & 4 (near engine control module, in protective case)
Junction connector 5 (near engine control module, in protective case)
Me01
Mpx-b2 fuse 7.5a
Oil
Passenger side j/b (at right kick panel)
Red
Shielded
Sil
Sln+
Sln-
Slt+
Slt-
Slu+
Slu-
Sp2+
Sp2-
Speedometer
Throttle control motor (on front of engine, on throttle body)
Throttle position sensor (on throttle body)
Transmissions system
Vehicle speed sensor (on transmission)
Vta
Vta2
Wfse

DEFOGGERS

Heated Mirrors Wiring Diagram for Lexus LS 430 2003

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List of elements for Heated Mirrors Wiring Diagram for Lexus LS 430 2003:

& 13 (behind upper center of dash)
(forward of left rear fenderwell)
(forward of right rear fenderwell)
Bdr
Computer data lines system
Cpub
D door fuse 25a
D25
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
F11
F17
Front passenger door ecu (inside right front door)
G10
Gnd
Hot at all times
Hot in on or start
Htr+
Htr-
I15
J/c 10 & 11 (behind upper center of dash)
J/c 12
J/c 21
J/c 27
J10
J11
J12 f
J13
Left outside rear view mirror
Mirror heater
Mpx-b1 fuse 7.5a
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Nca
P door fuse 25a
Passenger side j/b (at right kick panel)
Red
Right outside rear view mirror
Sig

Rear Defogger Wiring Diagram for Lexus LS 430 2003

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List of elements for Rear Defogger Wiring Diagram for Lexus LS 430 2003:

A/c control assembly (behind right side of dash)
A11
C13
Defog fuse 40a
Defog relay
Driver side j/b (at left kick panel)
Engine room 2 r/b (on left front of engine compartment, behind headlight)
Engine room r/b 1 (on left front of engine compt, behind headlight)
Fr ig fuse 7.5a
Fusible link block (on right rear of engine compt)
Hot at all times
Hot in on or start
Ig (at left side of dash)
J/c 1 (near engine control module, in protective case)
J/c 27 (forward of right rear fenderwell)
Noise filter (rear window defogger) (behind left headlight)
Rdfgr
Rear window defogger
Red

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Lexus LS 430 2003

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List of elements for Electronic Power Steering Wiring Diagram for Lexus LS 430 2003:

+bi
+bo
Abs-ig fuse 7.5a
Bat
C j12
Combination meter
D/g
Data link connector 3 (below left side of dash)
Driver side j/b (at left kick panel)
E10
Eb (under fusible link block)
Ec (at left radiator side support)
Ess
Gnd1
Gnd2
Gnd3
Gnd4
Hot at all times
Hot in on or start
Ig (at left side of dash)
Ig1
J13 c
J16 b
J17
J17 d
Junction connector 12 & 13 (behind upper center of dash)
Junction connector 16 & 17 (behind upper center of dash)
Mpx-b2 fuse 7.5a
Mxp1
Passenger side j/b (at right kick panel)
Pnk
Pps solenoid (on left front of engine compt)
S10
S11
S12
S13
Sil
Skid control ecu (behind left side of dash)
Sol+
Sol-
Sp1
Ss1+
Ss1-
Steering sensor (inside top of steering column)
Trig

ELECTRONIC SUSPENSION

Electronic Suspension Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for Electronic Suspension Wiring Diagram (1 of 2) for Lexus LS 430 2003:

(behind right side of dash) air suspension ecu
(inside left front fenderwell, attached to suspension control arm)
(inside right front fenderwell, attached to suspension control arm)
(on left front of engine compt, in protective case)
(on left side of engine compt)
(on right side of engine compt)
(under fusible link block) eb
A j17
A20
A21
A22
Acceleration sensor (on left side of luggage compartment, behind left rear fenderwell)
Airsus fuse 20a
Chs+
Chs-
Computer data lines system
Driver side j/b (at left kick panel)
E j16
Ec (at left radiator side support)
Engine control module
Erl
Err
Ess
Fal+
Fal-
Far+
Far-
Fbl+
Fbl-
Fbr+
Fbr-
Fro
Ggnd
Gl1
Gnd
Height control sensor (left front)
Height control sensor (rear) (under center rear of vehicle)
Height control sensor (right front)
Hot in on or start
Hsw
Ig (at left side of dash)
J/c 16 & 17 (behind upper center of dash)
J/c 18 (behind upper right side of dash)
J/c 27 (forward of right rear fenderwell)
J/c 28 & 29 (rearward of right rear fenderwell)
J28
J29
Mpx1
Mpx2
Pnk
Ral+
Ral-
Rar+
Rar-
Rbl+
Rbl-
Rbr+
Rbr-
Red
Rm+
Rm-
Sbl1
Sbl2
Sbl3
Sbr1
Sbr2
Sbr3
Sgfl
Sgfr
Sgl2
Sgl3
Sgr1
Sgr2
Sgr3
Sgrr
Shb
Shf2
Shfl
Shfr
Shg
Shr2
Shrl
Shrr
Sil
Slex
Slfl
Slfr
Slrl
Slrr
Ss2+
Ss2-
Steering sensor (inside top of steering column)
Suspension control actuator (left front)
Suspension control actuator (left rear) (near base of left "c" pillar)
Suspension control actuator (right front)
Suspension control actuator (right rear) (near base of right "c" pillar)
Sw1
Tach
Vgs

Electronic Suspension Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for Electronic Suspension Wiring Diagram (2 of 2) for Lexus LS 430 2003:

(at right side of dash) ik
(behind left side of dash)
(behind right side of dash)
(on right front of engine compt)
Absorber control switch
Air sus fuse 40a
Air sus relay
C15
Chs+
Chs-
Combination meter
Computer data lines system
Data link connector (dlc) 3 (below left side of dash)
Ea (at right radiator side support)
Eb (under fusible link block)
Fro
Front height control valve (on right front of engine compt)
Fusible link block (on right rear of engine compartment)
Headlight beam level control ecu
Height control compressor
Height control exhaust valve
Height control switch
Hot at all times
Ii (at right side of shift lever)
Ik (at right side of dash)
Ind light
Interior lights system
J/c 12 & 13 (behind upper center j13
J/c 23 (rearward of left rear fenderwell)
J12
Lh+
Luggage room j/b (on left side of luggage compt)
Mpx1
Mpx2
Of dash)
Opb
Passenger side j/b (at right kick panel)
Pnk
Rear height control valve (near front of engine compt)
Rh+
Rm+
Rm-
S11
S12
Sbf
Sgf
Shfl
Short connector (height control)
Shrl
Sil
Skid control ecu
Tems sport

ENGINE PERFORMANCE

4.3L

4.3L, Engine Performance Wiring Diagram (1 of 6) for Lexus LS 430 2003

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List of elements for 4.3L, Engine Performance Wiring Diagram (1 of 6) for Lexus LS 430 2003:

(at left kick panel) driver side j/b
(behind upper center of dash)
(right side of shift lever)
+b1
+bm
A/c system
A20
Accelerator position sensor (behind left center of dash)
Acmg
Air suspension ecu (behind right side of dash)
Anti-theft system (transponder key computer)
Batt
C12
C15
Combination meter
Computer data lines system
Cooling fans system
Cpu
Distance control ecu (behind right side of dash)
Ec (left radiator side support)
Elc
Eng+
Eng-
Engine control module (ecm) (on left front of engine compt, in protective case)
Ep1
Ep2
Epa
Eptk
Etam
Fpr
Htl2
Htr2
Igsw
Imi
Imo
J/c 10
J/c 12
J/c 13 (behind upper center of dash)
J/c 16, j/c 17
J/c 16, j/c 17 (behind upper center of dash)
J16
J17
Lcs
Mil ind
Mpx1
Mpx2
Mrel
Neo
Oxl2
Oxr2
Pnk
Ptnk
Pwr
Red
Rfc
S10 trc+
S11 sp1
S12 mpx2
S13
Short connector s1, s2
Sil
Skid control ecu (behind left side of dash)
Snow
Speedo- meter
Sta
Stp
Tach
Tam
Tbp
Trc+
Trc-
Vapor pressure sensor (below right rear of vehicle)
Vcc
Vcp1
Vcp2
Vcpa
Vpa
Vpa1
Vpa2
Vptk
Wfse

4.3L, Engine Performance Wiring Diagram (2 of 6) for Lexus LS 430 2003

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List of elements for 4.3L, Engine Performance Wiring Diagram (2 of 6) for Lexus LS 430 2003:

C/ opn relay
Data link connector 3 (below left side of dash)
Dome fuse 10a
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
E13
E16
E9 (engine harn, near engine room j/b 1)
Ec (left radiator side support)
Efi 1 fuse 30a
Efi main relay
Engine room r/b 1 (on left front of engine compt, behind headlight)
Etcs fuse 10a
F/ pmp relay
Fuel pump & fuel sender (under left rear of vehicle)
Fuel pump resistor (on left side of engine compt)
Gauge fuse 7.5a
Hot at all times
Hot in on or start
J/c 1, j/c 2 (near ecm, in protective case)
J/c 23 (rearward of left rear fender- well)
J/c 7 (below engine room j/b 1)
Mpx-b2 fuse 7.5a
Passenger side j/b (at right kick panel)
Red
Sil
Stpi
Stpo
Tac
Vsv (pressure switching valve) (below right rear of vehicle)
Wfse

4.3L, Engine Performance Wiring Diagram (3 of 6) for Lexus LS 430 2003

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List of elements for 4.3L, Engine Performance Wiring Diagram (3 of 6) for Lexus LS 430 2003:

(at left kick panel) driver side j/b
(below engine room j/b 1) j/c 7
(engine harn, under ecu box)
(generator) charging system
(on right side of transmission) park/neutral position switch
Acc
Braided
C14
E10 (engine harn, near front of battery)
Ee (side of right cyl head)
Efi 2 fuse 7.5a
Eknl
Engine control module (ecm) (on left front of engine compt, in protective case)
Engine room r/b 1 (on left front of engine compt, behind headlight)
Eoil
Eol1
F14
Fr ig fuse 7.5a
Fusible link block (on right rear of engine compt)
Hot at all times
Hot in on or start
Htl
Ign fuse 7.5a
Ignition switch
Knkl
Knkr
Left knock sensor (on left side of engine)
Lock
Mol
Nco+
Nco-
O/d direct clutch speed sensor (on left side of transmission)
Oil
Oxl1
P/n
Red
Right knock sensor (on right side of engine)
Sln+
Sln-
Slt+
Slt-
Slu+
Slu-
Sp2+
Sp2-
Sta fuse 7.5a
Start
Starter
Starter relay
Vehicle speed sensor (on transmission)

4.3L, Engine Performance Wiring Diagram (4 of 6) for Lexus LS 430 2003

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List of elements for 4.3L, Engine Performance Wiring Diagram (4 of 6) for Lexus LS 430 2003:

(above brake pedal, on bracket) stoplight switch
(at right kick panel) passenger side j/b
(below shift lever, in center console) shift lock control ecu
(on left center of engine) engine oil level sensor
(on right side of transmission) a/t indicator light switch (integral to park/neutral position switch)
At4
Atl
C10
C16
Driver side j/b
Driver side j/b (at left kick panel)
Ef (side of left cyl head)
Electronically controlled transmission solenoid (on left side of transmission)
Hot at all times
J/c 3, j/c 4 (near ecm, in protective case)
J/c 8 (behind left end of dash)
Nssd
Nssl
Red
Sln+
Sln-
Slt+
Slt-
Slu+
Slu-
Stop fuse 5a

4.3L, Engine Performance Wiring Diagram (5 of 6) for Lexus LS 430 2003

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List of elements for 4.3L, Engine Performance Wiring Diagram (5 of 6) for Lexus LS 430 2003:

(at right kick panel) passenger side j/b ecu
(dash harn, behind left side of instru- ment cluster)
(engine harn, e12
(engine harn, rear top of left cyl head)
(near ecm, in protective case) j/c 5, j/c 6
(right front of engine) right bank noise filter (ignition)
Center rear top of engine
Computer data lines system
E12
E13
E2g
Ef (side of left cyl head)
Electronically controlled transmission pattern select switch
Engine coolant temperature sensor (on front center of engine)
Engine room r/b 1 (on left front of engine compt, behind head- light)
Fuel inj 1
Fuel inj 2
Fuel inj 3
Fuel inj 4
Fuel inj 5
Fuel inj 6
Fuel inj 7
Fuel inj 8
Heated oxygen sensor (bank 1 sensor 1) (on exhaust system, on left side of engine)
Heated oxygen sensor (bank 1 sensor 2) (on exhaust system, below vehicle)
Heated oxygen sensor (bank 2 sensor 1) (on exhaust system, on right side of engine)
Heated oxygen sensor (bank 2 sensor 2) (on exhaust system, below vehicle)
Hot in on or start
Htl
Htr
Ik (right side of firewall)
Inj fuse 10a
Mass airflow meter (right side of engine compt, near air box)
Mpx-
Ox2
Pwr
Red
Snow
Tha
Vsv (acis) (on right rear of engine)
Vsv (canister closed valve) (on right side of engine compt)
Vsv (evap) (on left rear of engine)

4.3L, Engine Performance Wiring Diagram (6 of 6) for Lexus LS 430 2003

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List of elements for 4.3L, Engine Performance Wiring Diagram (6 of 6) for Lexus LS 430 2003:

(engine harn, center top of right cyl head)
(engine harn, center top rear of engine)
(engine harn, rear top of left cyl head)
(left rear of engine) left bank noise filter (ignition)
(near ecm, in protective case) j/c 5, j/c 6
A/c system
Acis
Braided
Camshaft position sensor (on front of left cyl head)
Ccv
Crankshaft position sensor (on left front of engine)
E01
E02
E03
E11
E12
E13
Ee (side of right cyl head)
Ef (side of left cyl head)
Eg2
Ene
Engine control module (ecm) (on left front of engine compt, in protective case)
Eor1
Eta
Etha
Ethw
Evg
Evvl
Evvr
G2-
Ge01
Htr
If1l
If1r
If2l
If2r
Ignition coil & igniter 1
Ignition coil & igniter 2
Ignition coil & igniter 3
Ignition coil & igniter 4
Ignition coil & igniter 5
Ignition coil & igniter 6
Ignition coil & igniter 7
Ignition coil & igniter 8
Igt1
Igt2
Igt3
Igt4
Igt5
Igt6
Igt7
Igt8
Lcki
Left camshaft timing oil control valve (on front of left cyl head)
Left vvt sensor (on left side of engine)
Me01
Mops
Ne+
Ne-
Ocr+
Ocr-
Ocv+
Ocv-
Oil pressure switch (on lower left front of engine)
Oxr1
Prg
Red
Right camshaft timing oil control valve (on front of right cyl head)
Right vvt sensor (on right side of engine)
Tha
Throttle control motor (on front of of engine, on throttle body)
Throttle position sensor (on throttle body)
Thw
Vta
Vta2
Vvl+
Vvl-
Vvr+
Vvr-

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Lexus LS 430 2003

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List of elements for Back-up Lamps Wiring Diagram for Lexus LS 430 2003:

(behind left end of dash) gateway ecu
A/c control assembly (behind right side of dash)
A11
Back-up light
Back-up light switch (park/neutral position switch)
Bck1
Bk/up
Bm (at left rear quarterpanel)
Center cluster integration panel
Engine control module (on left front of engine compt, in protective case)
Engine room 1 r/b (on left front of engine compt, behind headlight)
Fr ig fuse 7.5a
Fusible link block (on right rear of engine compt)
Hot at all times
Hot in on or start
J/c 1 & 2 (in protective case)
J/c 23 (rearward of left rear fenderwell)
J/c 24 & 25 (on left rear of luggage compt lid)
J24
J25
L12
L14
Left rear combination light
Lug j/b fuse 50a
Luggage room j/b (on left side of luggage compartment)
Luggage room j/b ecu
Mpi1
Mpl1
Mpx+
Mpx-
Mpx2
P-gnd
Red
Right rear combination light
W/ navigation
W/o navigation

Exterior Lamps Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Lexus LS 430 2003:

(at right side of shift lever)
Bubs
C12
Combination meter
Cpu
Dome fuse 10a
Driver side j/b (at left kick panel)
E13
E16
F15
Fusible link block (on right rear of engine compt)
Gateway ecu (behind left end of dash)
Gauge fuse 7.5a
High mounted stop light
Hot at all times
Hot in on or start
J/c 10 (behind upper center of dash)
J/c 12 (behind upper center of dash)
J/c 16 & 17 (behind upper center of dash)
J/c 23 (rearward of left rear fenderwell)
J/c 24 & 25 (on left rear of luggage compt lid)
J16
J17
J24
J24 c
J24 f
J25
J25 b
L12
L13
L14
Lce lp fuse 7.5a
Lce1
Left license plate light
Left rear combination light
Lug j/b fuse 50a
Luggage room j/b (on left side of luggage compartment)
Luggage room j/b ecu
Mpi2
Mpl1
Mpx+
Mpx-
Mpx-b2 fuse 7.5a
P-gnd
Passenger side j/b (at right kick panel)
Red
Right license plate light
Right rear combination light
Stop light
Stop1
Stop2
Stp1
Stp2
Stp3
Tail ind (canada)
Tail lights
Tail1
Tail2
Til1
Til2
Til3
Til4
Turn signal light
Turn signal light

Exterior Lamps Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Lexus LS 430 2003:

(at left side of dash) ig
(w/ navigation)
(w/o navigation)
Bu+
Bu-
C12
C14
Combination meter
Combination switch
Cral
Crar
Driver side j/b (at left kick panel)
Driver side j/b ecu
E13
E18
Ea (at right radiator side support)
Ec (at left radiator side support)
Engine room 1 r/b (on left front of engine compt, behind headlight)
Engine room 2 r/b (on left front of engine compt, behind headlight)
F11
Front controller
Ftal
Haz
Haz fuse 15a
Hazard switch
Hot at all times
Hot in on or start
Ih (at right side of shift lever)
Ii (at right side of shift lever)
J/c 13 (behind upper center of dash)
J/c 14 & 15 (behind upper center of dash)
J14
J15
Left front parking light
Left front side marker light
Left front turn signal light
Left signal ind
Mpx-b3 fuse 7.5a
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Passenger side j/b (at right kick panel)
Power tilt & power telescopic ecu (behind left side of dash)
Red
Right front parking light
Right front side marker light
Right front turn signal light
Right turn signal ind
Sidl
Sidr
Tail fuse 7.5a
Turn lh
Turn rh
Tx1
W/ compass
W/o compass

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 5) for Lexus LS 430 2003

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List of elements for Ground Distribution Wiring Diagram (1 of 5) for Lexus LS 430 2003:

(on left front of engine compartment, behind headlight) engine room 1 r/b
(on left rear of engine compartment) engine room 3 r/b
(on right rear of engine compartment) fusible link block
Abs & & trac & vsc actuator
Abs motor relay
Blower motor
Brake fluid level warning switch
Cooling fan ecu
E1 (engine harn, left front of engine compt, near protective case)
E4 (engine harn, behind right headlight)
E5 (engine harn, right side of engine compt)
E6 (engine harn, behind left headlight)
Ea (right radiator side support)
Eb (under fusible link block)
Ec (left radiator side support)
Ed (left firewall, top side)
Efi main relay
Engine control module
Engine hood courtesy switch
Exhaust gas sensor
Fan relay
Front height control valve
Front wiper motor
Gnd1
Gnd2
Gnd3
Gnd4
Headlight cleaner control relay
Headlight cleaner motor
Height control compressor
Height control exhaust valve
Ig1 relay
Ig2 relay
J/c 3 (near engine control module in protective case)
J/c 7 (below engine room 1 j/b & engine room 1 r/b)
Left front fog light
Left front parking light
Left front side marker light
Left front suspension control actuator
Left front turn signal light
Left headlight (high beam)
Left headlight control ecu
Right front fog light
Right front parking light
Right front side marker light
Right front suspension control actuator
Right front turn signal light
Right headlight (high beam)
Right headlight control ecu
S10
S13
Skid control ecu
Washer level sensor
Washer motor

Ground Distribution Wiring Diagram (2 of 5) for Lexus LS 430 2003

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List of elements for Ground Distribution Wiring Diagram (2 of 5) for Lexus LS 430 2003:

(dash harn, behind top right of dash) i6
(on left front of engine compt, behind headlight) engine room 2 r/b
A/c magnetic clutch & lock sensor
A24
Airbag sensor assembly
C12
C13
Combination meter
Combination switch
D-acc relay
D-ig1 relay
Data link connector 3
Defog relay
Distance control ecu
Driver side j/b (at left kick panel)
Driver side j/b ecu
E12
E12 (engine harn, top rear of engine)
E13
E13 (engine harn, top left side of engine)
E19
E20
Ee (side of right cylinder head)
Ef (side of left cylinder head)
Engine control module
Engine oil level sensor
Eo1
Eo2
Eo3
Front controller
Fuel lid opener switch
Gateway ecu
Gnd
Heated oxygen sensor (bank 1 sensor 1)
Heated oxygen sensor (bank 1 sensor 2)
Heated oxygen sensor (bank 2 sensor 1)
Heated oxygen sensor (bank 2 sensor 2)
Ig (left side of dash)
Ignition coil & ignitor 1
Ignition coil & ignitor 2
Ignition coil & ignitor 3
Ignition coil & ignitor 4
Ignition coil & ignitor 5
Ignition coil & ignitor 6
Ignition coil & ignitor 7
Ignition coil & ignitor 8
Ih (right side of shift lever)
Ij (right dash brace)
J/c 3, j/c 4 (near engine control module in protective case)
J/c 5, j/c 6 (near engine control module in protective case)
J/c 8 (behind left end of dash)
Laser radar sensor
Luggage compartment door opener switch
Me01
Multi- display
Outer mirror switch
Park/ neutral position switch
Power tilt & power telescopic ecu
Radio & player
Rheostat
Sgnd
Sln-
Steering sensor
T15
Telephone transceiver & speaker relay
Theft deterrent ecu
Transponder key computer
Un-
Unlock warning switch

Ground Distribution Wiring Diagram (3 of 5) for Lexus LS 430 2003

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List of elements for Ground Distribution Wiring Diagram (3 of 5) for Lexus LS 430 2003:

(on right rear of engine compt) fusible link block
A/c control assembly
A11
A24
A35
Absorber control switch
Air sus relay
Airbag sensor assembly
B w/o navigation
B1 (roof harn, right front of roof)
C12
C15
Central cluster integration panel
Clock
Combination meter
Console box illumination
Door lock control receiver (inner mirror)
E14
Electronically controlled transmission pattern select switch
F15
Front cigarette lighter
Glove box light 1
Glove box light 2
Gnd
Gnd3
Hazard switch
Headlight beam level control ecu
Height control switch
I4 (dash harn, behind center of dash)
I6 (dash harn, behind top right of dash)
Ii (right side of shift lever)
Ik (right dash side panel)
Left rear interior light
Left vanity light
Moon roof control ecu
Overhead j/b
P-acc relay
P-ig1 relay
Passenger side j/b (at right kick panel)
Passenger side j/b ecu
Power outlet
Right front buckle switch
Right rear interior light
Right vanity light
Shift lock control ecu
Short connector (height control)
T15
Telephone transceiver & speaker relay
Traction control switch, left seat heater switch, right seat heater switch, left climate control seat switch, right climate control seat switch, headlight cleaner switch, rear sunshade switch, rear seat reset switch
W/ navigation a

Ground Distribution Wiring Diagram (4 of 5) for Lexus LS 430 2003

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List of elements for Ground Distribution Wiring Diagram (4 of 5) for Lexus LS 430 2003:

(seat harn, under driver's seat) b5
A35
Audio & rear a/c control switch
B6 (seat harn, under driver's seat)
B8 (seat harn, in left rear seat back)
Bp (left rear passenger seat back)
Clearance sonar ecu
Climate control seat ecu (driver's seat)
D25
D27
D28
Door lock switch (luggage)
Driver door ecu
Driver seat ecu
Fuel lid opener motor
Fuel pump
Gnd
High mounted stop light
J/c 21 (forward of left rear fenderwell)
J/c 23 (rearward of left rear fenderwell)
J/c 24, j/c 25 (on left rear of luggage compt)
J/c 31 (behind left rear seat back)
L14
Left front buckle switch
Left front seat heater
Left rear buckle switch
Left rear combin- ation light
Left rear door ecu
Left rear head rest limit switch
Left rear seat ecu
Left rear seat heater
Left rear suspension control actuator
Left vibration seat ecu
Luggage compartment door closer motor
Luggage compartment door key unlock switch
Luggage room j/b (on left side of luggage compt)
Luggage room j/b ecu
Noise filter
Power seat control switch (driver's seat cushion)
Power seat control switch (driver's seat lumbar support)
Power seat motor & position sensor (rear passenger's left seat head rest top & bottom control)
Power seat position sensor (driver's seat cushion control)
Power seat position sensor (driver's seat front vertical control)
Power seat position sensor (driver's seat head rest control)
Power seat position sensor (driver's seat reclining control)
Power seat position sensor (driver's seat seat lifter control)
Power seat position sensor (driver's seat slide control)
Power seat position sensor (rear passenger's left seat slide control)
R13
Rear a/c unit
Rear height control valve
Rear seat control switch
Rear sunshade control relay
Right rear combin- ation light
Sgnd
W/ rear power seat

Ground Distribution Wiring Diagram (5 of 5) for Lexus LS 430 2003

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List of elements for Ground Distribution Wiring Diagram (5 of 5) for Lexus LS 430 2003:

A22
A35
Air suspension ecu
Audio & rear a/c control switch
B10
B11
B11 (seat harn, in right rear seat back)
B3 (body harn, right front luggage compt)
B7 (seat harn, under passenger's seat)
Bq (right rear passenger seat back)
Climate control seat ecu (front passenger's seat)
F17
Front passenger door ecu
Gnd
Ill-
Ir (under front passenger's seat)
J/c 27 (forward of right rear fenderwell)
J/c 28, j/c 29 (rearward of right rear fenderwell)
J/c 30 (rearward of right rear fenderwell)
Left rear seat heater
Navigation ecu
Power seat control switch (front passenger's seat lumbar support)
Power seat control switch (front passenger's seat)
Power seat motor & position sensor (right rear passenger's seat & head rest top & bottom control)
Power seat position sensor (right rear passenger's seat slide control)
R14
R23
Rear cigarette lighter
Rear window defogger
Right front seat heater
Right rear buckle switch
Right rear door ecu
Right rear head rest limit switch
Right rear pad wear indicator switch (right rear abs speed sensor)
Right rear seat ecu
Right rear seat heater
Right rear suspension control actuator
Right vibration seat ecu
S30
Sel1
Sel2
Sgnd
Stereo component amplifier
Stereo component tuner
T15
Telephone transceiver & speaker relay
W/ rear power seat
W/o rear power seat
W/rear power seat

HEADLIGHTS

Headlamps Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for Headlamps Wiring Diagram (1 of 2) for Lexus LS 430 2003:

(at left radiator side support) ec
Automatic light control sensor (behind upper center of dash)
Brake fluid level warning switch (on brake master cylinder reservoir)
Bu+
Bu-
Bubs
Cltb
Clte
Clts
Combination switch
Computer data lines system
Cty
D25
Data
Door lock control receiver
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
Driver side j/b ecu
E14
F11
Gnd
Head
Hot at all times
Hot in run or start
Hrly
I14
Ig (at left side of dash)
Ii (at right side of shift lever)
J14
Junction connector (behind upper center of dash)
Junction connector 14 & 15 (behind j15 upper center of dash)
Junction connector 7 (below engine room 1 j/b & engine room 1 r/b)
L14
Lbl
Left front door courtesy switch
Luggage room j/b ecu (on left side of luggage compartment)
Mpx+
Mpx-
Mpx-b
Mpx-b3 fuse 7.5a
Mpx-ig
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Parking brake switch (behind left end of dash, on parking brake mechanism)
Passenger side j/b (at right kick panel)
Pkb
Power tilt & power telescopic ecu (behind left side of dash)
Rco
Rda
Red
Rssi
S10
S11
S12
Skid control ecu (behind left side of dash)
Theft deterrent ecu (behind upper right center of dash)
Transponder key computer (behind upper center of dash)
Tx1

Headlamps Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for Headlamps Wiring Diagram (2 of 2) for Lexus LS 430 2003:

(on left front of engine compt, behind headlight)
Combination meter
Computer data lines system
Cpu
Dome fuse 10a
Driver side j/b (at left kick panel)
E10
E13
E16
Ea (at right radiator side support)
Ec (at left radiator side support)
Engine room 1 j/b (on left front of engine compt, behind headlight)
Engine room 1 r/b
Engine room 2 r/b (on left front of engine compt, behind headlight)
F15
Ffog
Fhhl
Fogl
Fogr
Fr fog fuse 15a
Front controller
Front fog ind
Gateway ecu (behind left end of dash)
Gauge fuse 7.5a
H-lp hi fuse 20a
H-lp l lwr fuse 15a
H-lp r lwr fuse 15a
Head ind (usa)
Head lp relay
High beam ind
Hlhl
Hlhr
Hot at all times
Hot in on or start
Ih (at right side of shift lever)
Ii (at right side of shift lever)
J16
J17
Junction connector (behind upper center of dash)
Junction connector 16 & 17 (behind upper center of dash)
Left front fog light
Left headlight control ecu
Left high beam headlight
Main fusible link
Mpd1
Mpd2
Mpi1
Mpi2
Mpl1
Mpl2
Mpx-b2 fuse 7.5a
Mpx1
Mpx2
Passenger side j/b (at right kick panel)
Red
Right front fog light
Right headlight control ecu
Right high beam headlight

Headlamps Leveling Wiring Diagram, with Air Suspension for Lexus LS 430 2003

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List of elements for Headlamps Leveling Wiring Diagram, with Air Suspension for Lexus LS 430 2003:

A20
A21
Air suspension ecu (behind right side of dash)
Altl
C17
Chg-
Combination meter
Combination switch
Computer data lines system
Cpu
Dome fuse 10a
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
E10
E13
E16
Engine room 2 r/b (on left front of engine compt, behind headlight)
F15
Flo
Fro2
Front controller
Gateway ecu (behind left end of dash)
Gauge fuse 7.5a
H-lp lvl fuse 5a
Hdlv
Head
Headlight beam level control ecu (behind right side of dash)
Hot at all times
Hot in on or start
Hot in run or start
Ig (at left side of dash)
Ii (at right side of shift lever)
Ik (at right side of dash)
J16
J17
Junction connector (behind upper center of dash)
Junction connector 16 & 17 (behind upper center of dash)
Left front height control sensor (inside left front wheelwell, attached to suspension control arm)
Left headlight beam level control actuator (behind left headlight)
Lh+
Lh-
Lh1
Lh2
Lh3
Lh4
Lhb
Lhe
Lhg
Lht
Mpi2
Mpl2
Mpx-b2 fuse 7.5a
Mpx1
Mpx2
Multi- display
Passenger side j/b (at right kick panel)
Passenger side j/b ecu (at right kick panel)
Pnk
Rear height control sensor (under center rear of vehicle)
Red
Rh+
Rh-
Rh1
Rh2
Rh3
Rh4
Rhb
Rhe
Rhg
Rht
Right headlight beam level control actuator (behind right headlight)
S10
S12
S13
Sbf
Sbl1
Sbl2
Sbl3
Sgf
Sgl1
Sgl2
Sgl3
Shb
Shf2
Shfl
Shg
Shr2
Shrl
Skid control ecu (behind left side of dash)
Spdl
Spdr
Wng

Headlamps Leveling Wiring Diagram, without Air Suspension for Lexus LS 430 2003

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List of elements for Headlamps Leveling Wiring Diagram, without Air Suspension for Lexus LS 430 2003:

(at right side of dash)
Altl
C17
Chg-
Combination meter
Combination switch
Computer data lines system
Cpu
Dome fuse 10a
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
E10
E13
E16
Engine room 2 r/b (on left front of engine compt, behind headlight)
F15
Flo
Fro2
Front controller
Gateway ecu (behind left end of dash)
Gauge fuse 7.5a
H-lp lvl fuse 5a
Hdlv
Head
Headlight beam level control ecu (behind right side of dash)
Hot at all times
Hot in on or start
Hot in run or start
Ig (at left side of dash)
Ii (at right side of shift lever)
J16
J17
Junction connector (behind a upper right side of dash)
Junction connector (behind upper center of dash)
Junction connector (behind upper right side of dash)
Junction connector 16 & 17 (behind upper center of dash)
Left front height control sensor (inside left front wheelwell, attached to suspension control arm)
Left headlight beam level control actuator (behind left headlight)
Lh+
Lh-
Lh1
Lh2
Lh3
Lh4
Lhb
Lhe
Lhg
Lht
Mpi2
Mpl2
Mpx-b2 fuse 7.5a
Mpx1
Mpx2
Multi- display
Passenger side j/b (at right kick panel)
Passenger side j/b ecu (at right kick panel)
Pnk
Rear height control sensor (under center rear of vehicle)
Red
Rh+
Rh-
Rh1
Rh2
Rh3
Rh4
Rhb
Rhe
Rhg
Rht
Right headlight beam level control actuator (behind right headlight)
S10
S12
S13
Sbf
Sgf
Shb
Shfl
Shg
Shrl
Skid control ecu (behind left side of dash)
Spdl
Spdr
Wng

HORN

Horn Wiring Diagram for Lexus LS 430 2003

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List of elements for Horn Wiring Diagram for Lexus LS 430 2003:

Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
Engine room 1 r/b (on left front of engine compt, behind headlight)
Engine room 2 r/b (on left front of engine compt, behind headlight)
F15
Fhor
Front controller
Horh
Horl
Horn (high)
Horn (low)
Horn fuse 10a
Horn switch (combination switch)
Hot at all times
Mpx
Mpx1
Mpx2
Mpx3
Security fuse 7.5a

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram for Lexus LS 430 2003

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List of elements for Instrument Cluster Wiring Diagram for Lexus LS 430 2003:

(at left kick panel)
(at right kick panel)
(at right side of shift lever)
(behind right side of dash)
(below left side of dash) data link connetor 3
(on lower left front of engine) oil pressure switch
A/b
A/c control assembly (behind right side of dash)
A/t 2
A/t 3
A/t 4
A/t d
A/t l
A/t n
A/t p
A/t r
A12
A21
Abs ind
Acc
Air suspension ecu w/ electronic
Air suspension)
Beam ind
Brake fluid level warning switch (on brake master cylinder reservoir)
Brake ind
C14
Center cluster integration panel
Chg- ind
Chk
Clock
Combination meter
Computer data lines
Computer data lines system
Cpu
Cruise ind
Display multi
Dome fuse 10a
Door ind
Driver side j/b
Driver side j/b (at left kick panel)
E13
E14
E16
E17
Ec (at left radiator side support)
Ef (on left cylinder head)
Electronic suspension system
Engine control module (in protective case)
Engine controls system
Engine oil level sensor
Exterior lights system
F red
F15
Front fog ind
Fsme
Fsms
Fsmv
Fsse
Fsss
Fssv
Fuel gauge
Fuel ind
Fuel sender (main) (forward of left rear fenderwell)
Fuel sender (sub) (under right rear of vehicle, forward of right rear fenderwell)
Gauge fuse 7.5a
H red
Head (usa) tail (canada)
Hot at all times
Hot in on or acc
Hot in on or start
I20
Ig+
Ih (at right side of shift lever)
Ii (at right side of shift lever)
Ill+
Ill-
Interior lights system
J/c 10 & 11 (behind upper center of dash)
J/c 16 & 17 (behind upper center of dash)
J/c 30 (rearward of right rear fenderwell)
J/c 4 (near engine control module, in protective case)
J/c16 & 17 (behind upper center of dash)
J10
J11
J14
J15
J16
J17
L13
L14
Lbl-
Left turn ind
Luggage room j/b ecu (on left side of luggage compt)
Master ind
Mil ind
Modulater
Mol
Mops
Mpx+
Mpx-
Mpx-b2 fuse 7.5a
Mpx1
Mpx2
Multi-display
Navigation, sound systems
Num
Of dash)
P-acc fuse 7.5a
P-ig fuse 7.5a
Parking brake switch (on parking brake mechanism)
Passenger side j/b
Passenger side j/b (at right kick panel)
Passenger side j/b ecu (at right kick panel)
Pbew
Pblt
Pind
Pkb
Pwr ind
Red
Right front pad wear indicator switch (right front abs speed sensor)
Right rear pad wear indicator switch (right rear abs speed sensor)
Right turn ind
Rset
S10
S11
S12
Seat belt ind
Skid control ecu (behind left side of dash)
Slip ind
Snow ind
Sp1
Speedometer
Srs ind
System
Tac
Tach
Tachometer
Tamo
Tamout
Tems
Tems sport ind
Trip odo/
Trip switch
Vsc off ind
W/ navigation
W/o navigation
Water temp gauge

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Lexus LS 430 2003:

(at right side of dash) ik
(at right side of shift lever)
(at right side of shift lever) ii
(behind upper center of dash) j/c 12
(in body harness, above center of right front door)
(in body harness, at right side of windshield header) b1
+b1
+b2
A/c control assembly (behind right side of dash)
A11
Air bag sensor assembly (behind lower center of dash)
Airbag
C12
Center cluster integration panel
Combination meter
Cspt
Cty
Dome fuse 10a
Door
Door ind
Driver side j/b (at left kick panel)
E13
E16
Engine control module (on left front of engine compt)
F13
F15
Fspt
Gauge fuse 7.5a
Gnd
Gnd1
Gnd3
Hot at all times
Hot in on or start
Ignition key cylinder light (transponder key amplifer)
Ih (at right side of shift lever)
Ii (at right side of shift lever)
Ile
J/c 10 & 11 (behind upper center of dash)
J/c 16 & 17 (behind upper center of dash)
J10
J11
J16 c
J17 c
Lcty
Led
Left rear interior light
Left step light
Left vanity light
Mpx+
Mpx-
Mpx-b
Mpx-b2 fuse 7.5a
Mpx1
Mpx2
Overhead j/b (at front of roof opening)
Passenger side j/b (at right kick panel)
Passenger side j/b ecu (at right kick panel)
Rcty
Red
Right rear interior light
Right step light
Right vanity light
Security fuse 7.5a
Skid control ecu (behind left side of dash)
W/ nav
W/o nav

Courtesy Lamps Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Lexus LS 430 2003:

(rearward of left rear fenderwell) j/c 23
Bdcy
Bdr
Cty
Ctyb
Cyl
D door fuse 25a
D25
Data
Door lock control receiver (inner mirror)
Door rr lh fuse 20a
Door rr rh fuse 20a
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
E11
F17
Front passenger door ecu (inside right front door)
G10
Gateway ecu (behind left end of dash)
Gnd
Hot at all times
Htr-
I14
J/c 21 (forward of left rear fenderwell)
J/c 27 (forward of right rear fender- well)
J10
L12
L14
Left front door courtesy light
Left front door courtesy switch
Left outer rear view mirror
Left rear door courtesy light
Left rear door courtesy switch
Left rear door ecu (inside left rear door)
Lgcy
Lglp
Luggage compartment light 1
Luggage compartment light 2
Luggage door lock switch
Luggage room j/b (on left side of luggage compt)
Luggage room j/b ecu (on left side of luggage compt)
Mpd1
Mpd2
Mpi1
Mpi2
Mpl1
Mpx-
Mpx1
Mpx2
Nca
P door fuse 25a
P-gnd
Passenger side j/b (at right kick panel)
R13
R14
Rc0
Rda
Red
Right front door courtesy light
Right front door courtesy switch
Right outer rear view mirror
Right rear door courtesy light
Right rear door courtesy switch
Right rear door ecu (inside right rear door)
Rr ecu-b fuse 7.5a
Rssi
Theft deterrent ecu (behind upper center of dash)
Transponder key computer (behind upper center of dash)

Instrument Illumination Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Lexus LS 430 2003:

(at left side of dash) ig
Anti-theft system
Ash+
Ash-
Bdr
C12
Clearance sonar switch (outer mirror switch) (w/park assist)
Coin box illumi- nation
Combination meter
Combination switch
Computer data lines system
D door fuse 25a
D24
D25
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
Driving position memory switch
E15
F10
F11
F16
F17
Front passenger door ecu (inside right front door)
G10
Gnd
Hot at all times
Hot in on or start
I18
J/c 14 & 15 (behind upper center of dash)
J/c 13 (behind upper center of dash)
J/c 21 (forward of left rear fender- well)
J/c 22 (rearward of left rear fenderwell)
J/c 23 (rearward of left rear fenderwall)
J/c 27 (foreward of right rear fenderwell)
J10
Led+
Led-
Left front inside handle illumination
Left rear ashtray illumination
Left rear door ecu (inside left rear door)
Left rear inside handle illumination
Left rear seat memory switch (w/ rear power seat)
Mpx-b3 fuse 7.5a
Mpx-ig fuse 7.5a
Mpx1
Mpx2
P door fuse 25a
Panel fuse 7.5a
Panel1
Panel2
Passenger side j/b (at right kick panel)
R12
R13
R14
R15
Rear seat control switch (w/ rear power seat)
Red
Remote control mirror switch (outer mirror switch)
Rheostat
Right front inside handle illumination
Right rear ashtray illumination
Right rear door ecu (inside right rear door)
Right rear inside handle illumination
Rr door lh fuse 20a
Rr door rh fuse 20a
Seid
Sw1
Sw2
Sw3
Tr+
Tr1
Tr2
Tr3

Instrument Illumination Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Lexus LS 430 2003:

(at right kick panel) passenger side j/b
(at right side of dash) ik
(behind upper center of dash) j/c 12 & 13
(in dash harness, behind passenger's side air bag) i6
(in dash harness, under left front of center console)
(rearward of right rear fenderwell) j/c 28 & 29
(w/o nav) (w/ nav)
A j16
A/t shift lever illumination
Absorber control switch (w/ electronic suspension)
Audio & rear a/c control switch (w/o rear power seat)
B j12
B11
Center cluster integration panel (w/o navigation)
Cigarette lighter (front)
Cigarette lighter (rear)
Clock (w/o navigation)
Console box illumination
D j13
D j28
D j29
Driver's a/c room temperature switch
E j17
E j28
Electronically controlled transmission pattern select switch
Front passenger's a/c room temperature switch
Fuel lid opener switch illumination
Glove box light 1
Glove box light 2
Hazard switch
Height control switch (w/ electronic suspension)
I16
Ii (at right side of shift lever)
J/c 16 & 17 (behind upper center of dash)
J/c 27 (foreward of right rear fenderwell)
J29 e
Mirror switch (outer mirror switch)
Multi-display (w/ navigation)
Overhead j/b (w/ garage door opener)
Radio & player
Right rear seat memory switch (w/ rear power seat)
Traction control switch, seat heater switches, climate control seat switches, headlight cleaner switch, rear sunshade switch, rear seat reset switch

MEMORY SYSTEMS

Driver"s Memory Seat Wiring Diagram for Lexus LS 430 2003

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List of elements for Driver"s Memory Seat Wiring Diagram for Lexus LS 430 2003:

(in body harness, under front of left front seat) b5
(in body harness, under rear of left front seat)
C20
Climate control seat ecu (if equipped) (under right side of driver's seat)
Computer data lines system
Csnf
Csnr
D p/seat fuse 30a
D24
D25
D27
D28
Down
Driver door ecu (inside front of left front door)
Driver seat ecu (below left side of driver's seat)
Driver side j/b (at left kick panel)
Driver's seat cushion position sensor
Driver's seat cushion power seat motor
Driver's seat front vertical position sensor
Driver's seat front vertical power seat motor
Driver's seat head rest power seat motor & position sensor
Driver's seat lifter position sensor
Driver's seat lifter power seat motor
Driver's seat reclining position sensor
Driver's seat reclining power seat motor
Driver's seat slide position sensor
Driver's seat slide power seat motor
Frv+
Frv-
Gnd
Hot at all times
Hot in on or start
I14
I17
Idl
J/c 10 (behind upper center of dash)
J/c 21 (forward of left rear fender- well)
J/c 21 (forward of left rear fenderwell)
J10
Memory seat switch
Mmry
Mpx-b1 fuse 7.5a
Mpx-ig fuse 7.5a
Mpx1
Mswe
O/p
Passenger side j/b (at right kick panel)
Pnk
Power seat control switch (driver's seat cushion)
Power seat control switch (driver's seat lumbar support)
Power seat motor (driver's seat lumbar support lower side control)
Power seat motor (driver's seat lumbar support upper side control)
Pvcc
Rcl+
Rcl-
Red
Rrv+
Rrv-
Sgnd
Sld+
Sld-
Ssfv
Ssrc
Ssrh
Ssrr
Ssrs
Ssrv
Sysb
Vcc

Memory Mirrors Wiring Diagram for Lexus LS 430 2003

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List of elements for Memory Mirrors Wiring Diagram for Lexus LS 430 2003:

(at right side of shift lever) ii
Bdr
Computer data lines system
Cpub
D door fuse 25a
D24
D25
Data
Dle
Door lock control receiver (inner mirror)
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
Driver side j/b ecu
Driving position memory switch
Engine control module (on left front of engine compartment, in protective case)
Engine controls system
F11
F16
F17
Front passenger door ecu (inside right front door)
G10
Gnd
Hot at all times
Hot in on or start
Hssr
I15
Ig (at left side of dash)
J/c 10 & 11 (behind upper center of dash)
J/c 12 & 13 (behind upper center of dash)
J/c 14 & 15 (behind upper center of dash)
J/c 21 (forward of left rear fenderwell)
J/c 27 (forward of right rear fenderwell)
J10
J11
J12
J13
J14
J15
Left front door lock control switch (power window master switch)
Left outside rear view mirror
Left/right motor
M+r
Mhr
Mind
Mmry
Mpx-b
Mpx-b1 fuse 7.5a
Mpx-b3 fuse 7.5a
Mpx-ig
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Mr+
Mr-
Msw
Mswe
Mul
Mvr
Outer mirror switch
P door fuse 25a
Passenger side j/b (at right kick panel)
Pnk
Pwe
R/e
Rco
Rda
Red
Ret
Retractable motor
Right front door lock control switch
Right outside rear view mirror
Rssi
Rtr
Sensor
Sig
Theft deterrent ecu (behind upper right center of dash)
Up/down motor
Vssr

Memory Power Tilt & Power Telescopic Wiring Diagram for Lexus LS 430 2003

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List of elements for Memory Power Tilt & Power Telescopic Wiring Diagram for Lexus LS 430 2003:

(behind left end of dash)
Com1
Com2
Computer data lines system
D24
D25
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
Driving position memory switch
Ecub
F/b1
F/b2
F11
G10
Gnd
Hot at all times
Hot in on or start
I14
Ig (at left side of dash)
Ih (at right side of shift lever)
J/c 13 (behind upper center of dash)
J/c 14 & 15 (behind upper center of dash)
J/c 9
J14
J15
Ksw
Mmry
Mpx-b3 fuse 7.5a
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Mswe
Nca
Passenger side j/b (at right kick panel)
Pnk
Power tilt & power telescopic ecu (behind left side of dash)
Red
S5v1
S5v2
Sg1
Sg2
Sin1
Sin2
Telescopic motor & position sensor (inside base of steering column)
Ti & te fuse 20a
Tilt motor & position sensor (inside base of steering column)
Transponder key computer (behind upper center of dash)
Unlock warning switch

Memory Rear Seat Wiring Diagram for Lexus LS 430 2003

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List of elements for Memory Rear Seat Wiring Diagram for Lexus LS 430 2003:

(at right rear seat back) bq
(behind upper center of dash) j/c 10 & 11
(left rear passenger's seat slide control) power seat motor
(rearward of left rear fenderwell)
B10
B10 (in body harness, under right center of rear backrest)
Bp (at left rear seat back)
Can
Computer data lines system
Cty
Down
Driver side j/b (at left kick panel)
Gnd
Hdwn
Hot at all times
Hrsw
Hup
I20
I21
Ik (at right side of dash)
Ind
J/c 23
J/c 27 (forward of right rear fenderwell)
J/c 30 (rearward of right rear fenderwell)
J/c 31 (behind left rear seat back)
J10
J11
Left rear door courtesy switch
Left rear head rest limit switch
Left rear seat memory switch
Luggage room j/b (on left side of luggage compartment)
Mpx
Mpx-
Mpx-b1 fuse 7.5a
Mpx1
Mpx2
Mswe
Passenger side j/b (at right kick panel)
Passenger side j/b ecu (at right kick panel)
Pcv2
Power seat motor & position sensor (left rear passenger's seat head rest top & bottom control)
Power seat motor & position sensor (right rear passenger's seat head rest top & bottom control)
Power seat motor (right rear passenger's seat slide control)
Power seat position sensor (left rear passenger's seat slide control)
Power seat position sensor (right rear passenger's seat slide control)
Pvcc
R12
R13
R14
R15
Rear door ecu (left) (inside left rear door)
Rear door ecu (right) (inside right rear door)
Rear seat control switch
Rear seat ecu (left) (behind left rear seat back)
Rear seat ecu (right) (behind right rear seat back)
Rear seat reset switch
Red
Right rear door courtesy switch
Right rear head rest limit switch
Right rear seat memory switch
Rr seat lh fuse 30a
Rr seat rh fuse 30a
Rrsw
Sel
Set
Sgnd
Sld+
Sld-
Ssrh
Ssrs
Ssrv
Sysb

NAVIGATION

Navigation Wiring Diagram for Lexus LS 430 2003

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List of elements for Navigation Wiring Diagram for Lexus LS 430 2003:

(behind upper center of dash) j/c 16 & 17
(rearward of right rear fenderwell) j/c 28
+b1
Acc
Aui+
Aui-
Auo+
Auo-
B12 (in body harness, near navigation ecu connectors)
Back
Combination meter
Computer data lines system
Crt fuse 7.5a
Driver side j/b (at left kick panel)
E16
E17
Fl+
Fl-
Gnd
Gnd1
Hot at all times
Hot in on or acc
Hot in on or start
Hot with l-acc realay energized
Ij (at right dash brace)
J/c 14 & 15 (behind upper center of dash)
J/c 30 (rearward of right rear fenderwell)
J14
J15
J16
J17
Left front door speaker
Luggage room j/b (on left side of luggage compt)
Macc
Mco+
Mco-
Mcvd
Mi1+
Mic-
Multi-display
N-mu
Navigation ecu (on lower right side of luggage compt)
Nca
Nvmu
P-acc fuse 7.5a
P-jg fuse 7.5a
Parking brake switch (behind left end of dash, on parking brake mechanism)
Passenger side j/b (at right kick panel)
Passenger side j/b ecu (at right kick panel)
Pbew
Pkb
Pnk
Red
Rev
Rr acc fuse 7.5a
S29
S30
Sgnd
Snse
Sound systems
Spd
Spdo
Stereo component amplifier (on right side of luggage compt, behind trim)
Sync
T14
Tel fuse 7.5a
Telephone transceiver & speaker relay (w/ lexus link: on right side of luggage compt) (w/o lexus link: on left side of luggage compt)
Tx+
Tx-

Parking Assistant Wiring Diagram for Lexus LS 430 2003

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List of elements for Parking Assistant Wiring Diagram for Lexus LS 430 2003:

(on left side of luggage compt) luggage room j/b
(rearward of left rear fenderwell) j/c 23
B4 (in body harness, at center of rear bumper)
Clearance sonar buzzer (front) (behind left side of dash)
Clearance sonar buzzer (rear) (near center of rear speaker shelf, at base of rear window)
Clearance sonar ecu (on left side of luggage compt)
Clearance sonar switch (outer mirror switch)
Clsw
Computer data lines system
Driver side j/b (at left kick panel)
E11
E13
E3 (in engine harness, behind left headlight)
Fbz
Fbz+
Fcl
Fcr
Fgnd
Fls
Frs
Gauge fuse 7.5a
Hot in on or start
Hot with l-ig1 realay energized
Interior lights system
Luggage room j/b (on left side of luggage compt)
Mgnd
Rbl
Rbr
Rbz
Rbz+
Red
Rgnd
Rr ig fuse 7.5a
Ultrasonic sensor (front left center) (behind front bumper fascia)
Ultrasonic sensor (front left side) (behind front bumper fascia)
Ultrasonic sensor (front left) (behind front bumper fascia)
Ultrasonic sensor (front right center) (behind front bumper fascia)
Ultrasonic sensor (front right side) (behind front bumper fascia)
Ultrasonic sensor (front right) (behind front bumper fascia)
Ultrasonic sensor (rear left center) (behind rear bumper fascia)
Ultrasonic sensor (rear left) (behind rear bumper fascia)
Ultrasonic sensor (rear right center) (behind rear bumper fascia)
Ultrasonic sensor (rear right) (behind rear bumper fascia)

PASSIVE RESTRAINTS

Electric Tension Reducer Wiring Diagram for Lexus LS 430 2003

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List of elements for Electric Tension Reducer Wiring Diagram for Lexus LS 430 2003:

A24
A25
Air bag
Air bag sensor assembly (behind lower center of dash, on transmission tunnel)
Bkll
Bklr
Dbkl
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
Gauge fuse 7.5a
Hot in on or start
Ik (at right side of dash)
J/c 14 (behind upper center of dash)
J/c 23 (rearward of left rear fenderwell)
Left front buckle switch
Left tension reducer solenoid (near base of left "b" pillar)
Mpx2
P-ig fuse 7.5a
Passenger side j/b (at right kick panel)
Passenger side j/b ecu
Rbe+
Right front buckle switch
Right tension reducer solenoid (near base of right "b" pillar)

Power Shoulder Belt Anchorage Wiring Diagram for Lexus LS 430 2003

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List of elements for Power Shoulder Belt Anchorage Wiring Diagram for Lexus LS 430 2003:

(inside front of left front door)
B/anc
Bdr
Bes
Computer data lines system
Cpub
D b/anc fuse 5a
D24
D25
Dbm+
Dbm-
Down
Driver door ecu
Driver side j/b (at left kick panel)
Driver side j/b ecu
Dsdn
Dse
Dsup
F16
F17
Front passenger door ecu (inside right front doo)
Gnd
Gnd1
Hot at all times
Hot in on or start
I15
Ig (at left side of dash)
Ii (at right side of shift lever)
Ik (at right side of dash)
J/c 21 (forward of left rear fenderwell)
J/c 27 (forward of right rear fenderwell)
J10
Left front shoulder belt adjust switch
Mpx-
Mpx-b1 fuse 7.5a
Mpx-ig fuse 7.5a
Mpx1
Mpx2
P b/anc fuse 5a
P door fuse 25a
Passenger side j/b (at right kick panel)
Passenger side j/b ecu
Pbm+
Pbm-
Psdn
Pse
Psup
Red
Right front shoulder belt adjust switch
Shoulder belt anchor motor & position sensor (left) (near center of left "b" pillar)
Shoulder belt anchor motor (right) (near center of right "b" pillar)
Sig

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 5) for Lexus LS 430 2003

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List of elements for Power Distribution Wiring Diagram (1 of 5) for Lexus LS 430 2003:

(at right kick panel) passenger side j/b
(see headlights system)
Abs 1 fuse 40a
Abs 2 fuse 40a
Air conditioning system
Air conditioning system & body computer system
Air sus fuse 40a
Alt fuse 140a
Alt-s fuse 5a
Am 2 fuse 30a
Anti-lock brake system & cruise control system
Anti-theft system, body computer system & horns system
Anti-theft system, body computer system, door locks system & power windows system
Anti-theft system, body computer system, door locks system, mirrors system, passive restraints system, power windows system & seats system
Battery
Battery fuse 30a
Body computer system
Body computer system & exterior lights system
Body computer system & headlights system systems
Body computer system, exterior lights system, headlights system, instrument cluster system, interior lights system, memory system, mirrors system, trunk, tailgate, fuel doors system & wiper/washer system
C12
C13
Crt fuse 7.5a
Cruise control system
Cruise control system, engine controls system & transmission systems
D-j/b fuse 80a
D/c cut fuse 20a
Defog fuse 40a
Defogger system
E16
Efi 1 fuse 30a
Efi 2 fuse 7.5a
Efi main relay
Electronic suspension system
Engine controls system
Engine room j/b 1 (on left front of engine compt, behind headlight)
Engine room r/b 1
Etcs fuse 10a
Fan fuse 50a
Fan relay
Fl main
From ignition switch (diagram 3 of 5)
Fusible link block
H-lp hi fuse 20a
Haz fuse 15a
Headlamp relay
Heater fuse 50a
Horn fuse 10a
I10
I21
Ig2 fuse 7.5a
Ig2 relay
Lug j/b fuse 50a
Mirrors system & passive restraints system
Mpx-b
Mpx-b1 fuse 7.5a
Mpx-b2 fuse 7.5a
Mpx-b3 fuse 7.5a
Navigation system
Nca
P-j/b fuse 80a
Passenger side j/b ecu
R/b fuse 60a
Radio 1 fuse 7.5a
Red
Seats system
Sound system
Starter
Starting/ charging system
To dome fuse (diagram 2 of 5)
To driver side j/b (d-acc relay) (diagram 4 of 5)
To engine room j/b 1 (r/b 1, h-lp cln fuse, 30a) (diagram 2 of 5)
To engine room j/b 1 (r/b 1, h-lp l lwr, fuse 15a) (diagram 2 of 5)
To engine room j/b 1 (r/b 1, ign fuse, 7.5a) (diagram 2 of 5)
To ignition switch (diagram 3 of 5)
To junction connector j3 (diagram 2 of 5)
To luggage room j/b (diagram 5 of 5)
To passenger side j/b (p door fuse, 25a) (diagram 3 of 5)
W/ compass
W/o compass

Power Distribution Wiring Diagram (2 of 5) for Lexus LS 430 2003

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List of elements for Power Distribution Wiring Diagram (2 of 5) for Lexus LS 430 2003:

(rb 1, ig2 relay) (diagram 1 of 5)
A/c ig fuse 7.5a
Air conditioning system
Air conditioning system, cooling fans system, cruise control system, defogger system, exterior lights system, mirrors system, navigation system, seats system, starting/charging system, transmissions system & wiper/washer system
Anti-theft system, body computer system, exterior lights system & headlights system
Body computer system & headlights system
Body computer system & wiper/ washer system
Body computer system & wiper/washer system
Cruise control system, engine controls system & transmissions system
Dome fuse 10a
E13
Ec (left radiator side support)
Engine controls system & starting/ charging system
Engine room j/b 1
Engine room j/b 1 (on left front of engine compt, behind headlight)
Engine room r/b 1
Engine room r/b 1 (on left front of engine compt, behind headlight)
Fr fog fuse 15a
Fr ig fuse 7.5a
From driver side j/b (d-ig1 relay) (diagram 4 of 5)
From engine room j/b 1 (r/b 1, headlamp relay) (diagram 1 of 5)
From engine room j/b 1 (r/b 1, ig2 relay) (diagram 1 of 5)
From engine room j/b 1 j
From fr fog fuse (diagram 2 of 5)
From fusible link block (r/b fuse, 60a) (diagram 1 of 5)
From passenger side j/b (mpx-b1 fuse, 7.5a) (diagram 1 of 5)
H-lp cln fuse 30a
H-lp l lwr fuse 15a
H-lp r lwr fuse 15a
Ig1 relay
Ign fuse 7.5a
Inj fuse 10a
J/c 3 (near engine control module, in protective case)
J/c 7 (below engine room room j/b 1 & engine room r/b 1)
Passenger side j/b (at right kick panel)
Red
Tail fuse 7.5a
To ig1 relay (diagram 2 of 5)
Washer fuse 20a
Wip fuse 30a
Wiper/ washer system

Power Distribution Wiring Diagram (3 of 5) for Lexus LS 430 2003

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List of elements for Power Distribution Wiring Diagram (3 of 5) for Lexus LS 430 2003:

20a
Acc
Air conditioning system, body computer system, instrument cluster system, mirrors system, navigation system, power tops system, seats system, warning system & wiper/washer system
Air conditioning system, instrument cluster system, navigation system & sound system
Am1
Am2
Anti-theft system, body computer system, door locks system, interior lights system, mirrors system, passive restraints system & power tops system
B/anc
C17
D door fuse 25a
Door lock system interior light system anti-theft system power window system
E17
Engine controls system, starting/ charging system & transmissions system
Engine room j/b 1 (on left front of engine compt, behind headlight)
Engine room r/b 1
F11
From driver side j/b (am1 fuse, 7.5a) (diagram 4 of 5)
From driver side j/b (d-acc relay) (diagram 4 of 5)
From driver side j/b (d-ig1 relay) (diagram 4 of 5)
From fusible link block (am2 fuse, 30a) (diagram 1 of 5)
From fusible link block (p-j/b fuse, 80a) (diagram 1 of 5)
Front cigarette lighter
Fusible link block (on right rear of engine compt)
G10
G302 (right side of shift lever)
H-lp lvl fuse 5a
Headlights system
Ig1
Ig2
Ignition switch
Ik (right side side panel)
J10
Junction connectors j/c 12 & j/c 13 (behind upper center of dash)
Lock
Navigation system & sound system
P b/anc fuse 5a
P door fuse 25a
P rr-ig fuse 10a
P s/htr fuse 15a
P-acc fuse 7.5a
P-acc relay
P-cig fuse 15a
P-ig fuse 7.5a
P-ig1 relay
Passenger side j/b (at right kick panel)
Passenger side j/b ecu
Pnk
Red
Rr door lh fuse 20a
Rr door rh fuse
Seats system
St2
Sta fuse 7.5a
Start
Starter relay
Tel fuse 7.5a
To passenger side j/b (ig2 fuse 7.5a) (diagram 1 of 5)

Power Distribution Wiring Diagram (4 of 5) for Lexus LS 430 2003

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List of elements for Power Distribution Wiring Diagram (4 of 5) for Lexus LS 430 2003:

(right side side panel) ik
A/c fuse 7.5a
Abs-ig fuse 7.5a
Air conditioning system
Air conditioning system & body computer system
Airsus fuse 20a
Am1 fuse 7.5a
Anti-theft system, body computer system, defogger system, door locks system, mirror system, passive restraints system & power windows system
Anti-theft system, body computer system, door locks system & power windows system
Anti-theft system, body computer system, door locks system, mirrors system, power windows system & shift interlock system
B/anc
Body computer system
Body computer system & horns system
Body computer system, cruise control system, electronic suspension system, engine controls system, exterior lights system, seats system, shift interlock system & transmission system
Body computer system, garage door system & interior lights system
Cruise control system
Cruise control system, electronic suspension system, engine controls system & transmission system
D b/anc fuse 5a
D p/seat fuse 30a
D rr-ig fuse 10a
D s/htr fuse 15a
D-acc fuse 7.5a
D-acc relay
D-cig fuse 15a
D-ig1 relay
Driver side j/b (at left kick panel)
Driver side j/b ecu
E10
E11
E17
Electronic suspension system
F11
F12
F15
F16
F17
F18
From d s/htr p fuse 15a (diagram 4 of 5)
From fusible link block (d-j/b fuse, 80a) (diagram 1 of 5)
From security q fuse 7.5a (diagram 4 of 5)
G10
G202 (left side of dash)
Gauge fuse 7.5a
I15
I17
J/c 30 (rearward of right rear fenderwell)
J10
Memory system
Mpx-ig fuse 7.5a
Navigation system
Obd fuse 7.5a
Panel fuse 7.5a
Passive restraints system & body computer system
Pnk
Power outlet
Pwr outlet fuse 15a
Rear cigarette lighter
Red
Seats system
Security fuse 7.5a
Shift interlock system
Stop fuse 5a
Ti & te fuse 20a
To engine room j/b 1 (r/b 1, ig1 relay) (diagram 2 of 5)
To gauge fuse 7.5a (diagram 4 of 5)
To ignition switch (diagram 3 of 5)
To j/c 12 & j/c 13 (diagram 3 of 5)
To panel fuse 7.5a (diagram 4 of 5)
To passenger side j/b (p-acc relay) (diagram 3 of 5)

Power Distribution Wiring Diagram (5 of 5) for Lexus LS 430 2003

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List of elements for Power Distribution Wiring Diagram (5 of 5) for Lexus LS 430 2003:

Acc
Air conditioning system & body computer system
Amp fuse 30a
Body computer system & interior lights system
Body computer system, exterior lights system & interior lights system
C10
C11
Cellular telephone system
Coil
Contact
E13
E19
F10
From fusible link block (lug j/b fuse, 50a) (diagram 1 of 5)
From rr s/shade r fuse 15a (diagram 5 of 5)
Fuel opn fuse 10a
Fuel opn(p)
J/c 23 (rearward of left rear fenderwell)
L-acc relay
L-ig1 relay
L-o/c (p)
Lce lp fuse 7.5a
Luggage room j/b (on left side of luggage compartment)
Luggage room j/b ecu
Navigation system
Noise filter
P p/seat fuse 30a
P-gnd
Power tops system
Rr a/c fuse 7.5a
Rr acc fuse 7.5a
Rr ecu-b fuse 7.5a
Rr ig fuse 7.5a
Rr s/htr fuse 20a
Rr s/shade fuse 15a
Rr s/shade relay
Rr seat lh fuse 30a
Rr seat rh fuse 30a
S roof fuse 25a
Seats system
Sound system
To fuel opn fuse 10a (diagram 5 of 5)

POWER DOOR LOCKS

Power Door Locks Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for Power Door Locks Wiring Diagram (1 of 2) for Lexus LS 430 2003:

A1+
A1-
Anti-theft system
Bdr
Bl (at left rear floor partition panel)
Bn (at right rear floor partition panel)
Cps1
Cps2
Cps3
Cpse
Cpub
Cty
D24
D25
Dbls
Dle
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
F11
F16
F17
Front passenger door ecu (inside right front door)
Full
Ground
Half
Hot in on or start
I15
Ill+
Junction connector 21 (forward of left rear fenderwell)
Junction connector 27 (forward of right rear fenderwell)
Keye
Kul
Left front door courtesy switch
Left front door lock motor
Lsw
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Mul
Pnk
Pole
Power window master switch
Pwe
Pws
Red
Right front door courtesy switch
Right front door lock control switch
Right front door lock motor
Sig
Warning system

Power Door Locks Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for Power Door Locks Wiring Diagram (2 of 2) for Lexus LS 430 2003:

A1+
A1-
Anti-theft system
Bdr
Bl (at left rear floor partition panel)
Bn (at right rear floor partition panel)
Bo (at right rear quarterpanel)
Cps1
Cps2
Cps3
Cpse
Cpub
Cty
D door fuse 25a
Dbls
Dlel
Driver side j/b (at left kick panel)
Full
G10
Ground
Half
Hot at all times
I10
I22
J10
J11
J12
J13
Junction connector 10 &11 (behind upper center of dash)
Junction connector 12 & 13 (behind upper center of dash)
Junction connector 21 (forward of left rear fenderwell)
Junction connector 27 (forward of right rear fenderwell)
Junction connector 30 (rearward of right rear fenderwell)
Left rear door courtesy switch
Left rear door ecu (inside left rear door)
Left rear door lock motor
Lh rr door fuse 20a
Lsw
Mpx-b1 fuse 7.5a
Mpx1
Mpx2
P door fuse 25a
Passenger side j/b (at right kick panel)
Pole
R13
R14
Red
Rh rr door fuse 20a
Right rear door courtesy switch
Right rear door ecu (inside right rear door)
Right rear door lock motor
Sel1
Sig

POWER MIRRORS

Power Mirrors Wiring Diagram for Lexus LS 430 2003

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List of elements for Power Mirrors Wiring Diagram for Lexus LS 430 2003:

D25
Driver door ecu (inside front of left front door)
Ec+
Ec-
Eci+
Eci-
F14
F16
F17
Front passenger door ecu (inside right front door)
Gnd
Gnd5
Hot in on or start
I12
Ig1
Ii (at right side of shift lever)
Inner mirror
J/c 14 (behind upper center of dash)
Left outside rear view mirror
Overhead j/b (at front of roof opening)
P-ig fuse 7.5a
Passenger side j/b (at right kick panel)
Right outside rear view mirror

POWER SEATS

Climate Control Seats Wiring Diagram for Lexus LS 430 2003

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List of elements for Climate Control Seats Wiring Diagram for Lexus LS 430 2003:

(forward
(under right front seat)
Blr wtr lh
Blr wtr rh
Climate control seat switch
Computer data lines system
D s/htr fuse 15a
Driver climate control seat ecu (under right side of driver's seat)
Driver seat climate controller (seat back)
Driver seat ecu (below left side of driver's seat)
Driver side j/b (at left kick panel)
Fenderwell)
Front passengers climate control seat ecu (under front passenger's seat)
G j14
G j15
Hot in on or start
Idl
Ik (at right side of dash)
Ind
J/c 14 & 15 (behind upper center of dash)
J/c 21
Lh cush thrm
Lind
Lv5
Lvg
Lvs
Mpx1
Of left rear
P s/htr fuse 15a
P-ig fuse 7.5a
Passenger seat climate controller (seat back)
Passenger side j/b (at right kick panel)
Pnk
Red
Rh cush thrm
Rind
Rlid
Rrid
Rsid
Rv5
Rvg
Rvs
Tb5
Tbs
Tdb+
Tdb-
Ted
Ted lh/cush
Ted rh/cush

Driver"s Lumbar Wiring Diagram for Lexus LS 430 2003

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List of elements for Driver"s Lumbar Wiring Diagram for Lexus LS 430 2003:

(forward of left rear fenderwell)
D p/seat fuse 30a
Driver side j/b (at left kick panel)
Hot at all times
J/c 21
J10
Power seat control switch (driver's seat lumbar support)
Power seat motor (driver's seat lower side lumbar support control)
Power seat motor (driver's seat upper side lumbar support control)
Red

Heated Seats Wiring Diagram, Front for Lexus LS 430 2003

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List of elements for Heated Seats Wiring Diagram, Front for Lexus LS 430 2003:

(forward of left rear fenderwell)
D s/htr fuse 15a
Driver seat heater
Driver side j/b (at left kick panel)
G j14
G j15
Hot in on or start
Ik (at right side of dash)
Ir (under right front seat)
J/c 14 & 15 (behind upper center of dash)
J/c 21
P s/htr fuse 15a
P-ig fuse 7.5a
Passenger seat heater
Passenger side j/b (at right kick panel)
Seat heater switch
Thl
Thr

Heated Seats Wiring Diagram, Rear for Lexus LS 430 2003

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List of elements for Heated Seats Wiring Diagram, Rear for Lexus LS 430 2003:

B10 (w/ rear power seats)
B11 (w/o rear power seats)
B9 (w/ rear power seats) b11 (w/o rear power seats)
Bp (at left rear seat back)
G j14
G j15
Hil
Hir
Hot in on or start
Hot with l-ig1 relay energized
Ik (at right side of dash)
Indc
J/c 14 & 15 (behind upper center of dash)
J/c 27 (forward of right rear fenderwell)
Left rear seat heater
Luggage room j/b (on left side of luggage compt)
P-ig fuse 7.5a
Passenger side j/b (at right kick panel)
Power seats
Rear seat heater switch
Right rear seat heater
Rr s/htr fuse 20a
Seat heater switch
W/ rear power seats
W/o rear
W/o rear power seats

Passenger"s Power Seat Wiring Diagram for Lexus LS 430 2003

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List of elements for Passenger"s Power Seat Wiring Diagram for Lexus LS 430 2003:

Down
Front
Front passenger's power seat control switch
Front passenger's power seat sub control switch
Head rest
Hot at all times
Ir (under right front seat)
Lifter
Luggage room j/b (on left side of luggage compt)
Lumbar
P p/seat fuse 30a
Power seat control switch (front passenger's seat lumbar support)
Power seat motor (front passenger's seat front lifter control)
Power seat motor (front passenger's seat front vertical control)
Power seat motor (front passenger's seat head rest control)
Power seat motor (front passenger's seat lumbar support control)
Power seat motor (front passenger's seat reclining control)
Power seat motor (front passenger's seat slide control)
Rear
Reclining
Red
Slide
Vertical

Rear Vibrating Seats Wiring Diagram for Lexus LS 430 2003

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List of elements for Rear Vibrating Seats Wiring Diagram for Lexus LS 430 2003:

B10
Bp (at left rear seat back)
Bq (at right rear seat back)
D rr-ig fuse 10a
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
Front passenger door ecu (inside right front door)
G j10
Gnd1
Hot at all times
Hot in on or start
I14
I20
J/c 10 & 11 (behind upper center of dash)
J/c 31 (behind left rear seat back)
J11 g
Left rear door ecu (inside left rear door)
Left rear seat ecu (behind left rear seat back)
Left vibration seat ecu (behind left rear seat back)
Left vibrator (behind left rear seat back)
Mpx
Mpx-b1 fuse 7.5a
Mpx1
Mpx2
P rr-ig fuse 10a
Passenger side j/b (at right kick panel)
Right rear door ecu (inside right rear door)
Right rear seat ecu (behind right rear seat back)
Right vibration seat ecu (behind right rear seat back)
Right vibrator (behind right rear seat back)
Stop
Strt
Sysb
Vib+
Vib-
Vibe
Vibration switch (rear seat control switch)

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagram for Lexus LS 430 2003

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List of elements for Power Top/Sunroof Wiring Diagram for Lexus LS 430 2003:

Cls
Combination meter
Cpu
Cty
D25
Data
Dome fuse 10a
Door lock control receiver (inner mirror)
Down
Driver door ecu (inside front of left front door)
Driver side j/b (at left kick panel)
Dwn
E11
E13
E16
F15
F17
F18
Gateway ecu (behind left side of dash)
Gauge fuse 7.5a
Gnd
Hot at all times
Hot in on or start
I14
Ig3
Ii (at right side of shift lever)
Ik (at right side of dash)
J/c 10 & 12 (behind upper center of dash)
J/c 14 (behind upper center of dash)
J/c 16 & 17 (behind upper center of dash)
J10
J12
J16
J17
Left front door courtesy switch
Left rear door courtesy switch
Left rear door ecu (inside left rear door)
Luggage room j/b (on left side of luggage compt)
Moon roof control ecu (at front of roof opening)
Mpd1
Mpd2
Mpi2
Mpx
Mpx-b2 fuse 7.5a
Mpx1
Mpx2
Opn
Overhead j/b (at front of roof opening)
P-ig fuse 7.5a
Passenger side j/b (at right kick panel)
R13
R14
Rc0
Rda
Red
Right front door courtesy switch
Right front door ecu (inside right front door)
Right rear door courtesy switch
Right rear door ecu (inside right rear door)
Rssi
S/roof fuse 25a
Theft deterrent ecu (behind upper right center of dash)
Transponder key computer (behind upper center of dash)

POWER WINDOWS

Power Windows Wiring Diagram (1 of 3) for Lexus LS 430 2003

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List of elements for Power Windows Wiring Diagram (1 of 3) for Lexus LS 430 2003:

(forward of left rear fenderwell) junction connector 21
(inside front of left front door) driver door ecu
+b1
+b2
Acc
Auto
Bdr
Bl (at left rear floor partition panel)
Bzr
Bzr2
Bzr3
Bzrg
Cpub
Cty
D door fuse 25a
D-acc fuse 7.5a
D24
D25
Data
Ddn
Door lock control receiver (inner mirror)
Driver side j/b (at left kick panel)
Dt1
Dt2
Dt3
Dup
F11
F17
F18
G10
Gnd
Hot at all times
Hot in on or acc
Hot in on or start
I14
I15
I19
I21
I22
Ih (at right side of shift lever)
Ii (at right side of shift lever)
J/c 12, j/c 13 (behind upper center of dash)
J10
J11
J12
J13
J14 j/c 14, j/c 15 (behind upper center of dash)
J15
Junction connector 10, junction connector 11 (behind upper center of dash)
Keyless buzzer (near base of "a" pillar)
Keyless buzzer on/off switch
Left front door courtesy switch
Left front power window motor
Lmt
Mdn
Mpx-ig fuse 7.5a
Mpx1
Mpx2
Mup
Passenger side j/b (at right kick panel)
Pls
Power window master switch
Pwe
Pws
Rc0
Rda
Red
Rssi
Sc1
Sc2
Sc3
Security fuse 7.5a
Sgnd
Sig
Theft deterrent ecu (behind upper right center of dash)
Trans- ponder key computer (behind upper center of dash)
W/l
Wls1
Wlsw

Power Windows Wiring Diagram (2 of 3) for Lexus LS 430 2003

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List of elements for Power Windows Wiring Diagram (2 of 3) for Lexus LS 430 2003:

Auto
Bdr
Bn (at right rear floor partition panel)
Cpub
Cty
E11
E18
F16
F17
Front passenger door ecu (inside right front door)
Gateway ecu (behind left end of dash)
Gnd
Hot at all times
I10
I13
J10
J10 j/c 10, j/c 11 (behind upper center of dash)
J11
Junction connector 27 (forward of right rear fenderwell)
Lmt
Mdn
Mpd1
Mpd2
Mpx-b1 fuse 7.5a
Mpx1
Mpx2
Mup
P door fuse 25a
Passenger side j/b (at right kick panel)
Pct
Pls
Pwe
Red
Right front door courtesy switch
Right front power window control switch
Right front power window motor
Sgnd
Sig
Wls1

Power Windows Wiring Diagram (3 of 3) for Lexus LS 430 2003

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List of elements for Power Windows Wiring Diagram (3 of 3) for Lexus LS 430 2003:

(inside left rear door) left rear door ecu
Auto
Bdr
Bl (at left rear floor partition panel)
Bn (at right rear floor partition panel)
Bo (at right rear quarterpanel)
Cpub
Cty
Gnd
Hot at all times
Junction connector 21 (forward of left rear fenderwell)
Junction connector 27 (forward of right rear fenderwell)
Junction connector 30 (rearward of right rear fenderwell)
Left rear door courtesy switch
Left rear power window control switch
Left rear power window motor
Left rr door fuse 20a
Lmt
Mdn
Mpx1
Mpx2
Mup
Passenger side j/b (at right kick panel)
Pct
Pcti
Pcto
Pls
Pwe
R12
R13
R14
R15
Red
Right rear door courtesy switch
Right rear door ecu (inside right rear door)
Right rear power window control switch
Right rear power window motor
Right rr door fuse 20a
Sel1
Sgnd
Sig

Rear Window Sun Shade Wiring Diagram for Lexus LS 430 2003

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List of elements for Rear Window Sun Shade Wiring Diagram for Lexus LS 430 2003:

(at right side of firewall) ik
Bm (at left rear quarterpanel)
Bp (at left rear seat back)
Ecu
Fsw
Hot at all times
J/c 23 (rearward of left rear fenderwell)
J/c 26 (near center of rear speaker shelf)
L14
Lmt
Luggage room j/b (on left side of luggage compt)
Luggage room j/b ecu
Luggage room j/b ecu (on left side of luggage compt)
P-gnd
Rear sunshade control relay (below center of rear speaker shelf)
Rear sunshade switch
Rear sunshade switch (rear seat control switch) (w/ rear power seat)
Rev
Rr s/shade fuse 15a
Rr s/shade relay
Rsc
Rss
Rsw
W/ rear pwr seat and/or electronic modulated air suspension
W/o rear pwr seat and/or electronic modulated air suspension

RADIO

Radio Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for Radio Wiring Diagram (1 of 2) for Lexus LS 430 2003:

Acc
Amp fuse 30a
Atx+
Atx-
C10
E17
Gateway ecu (behind left end of dash)
Gnd
Gtx+
Gtx-
Hot at all times
Hot in on or acc
Hot with l-acc relay energized
Ij (at right dash brace)
J14
J15
J28
J29
Junction connector 14 & 15 (behind upper center of dash)
Junction connector 28 & 29 (rearward of right rear fenderwell)
Junction connector 30 (rearward of right rear fenderwell)
Luggage room j/b (on left side of luggage compt)
Multi- display
Mute
Nca
P-acc fuse 7.5a
Passenger side j/b (at right kick panel)
Radio & player
Radio 1 fuse 7.5a
Red
Rr acc fuse 7.5
Rr ecu-b fuse 7.5
Sgnd
Stereo component tuner (on lower right side of luggage compartment)
Tel fuse 7.5a
Tx+
Tx-
Txs+
Txs-
W/ navigation
W/ rear audio controller

Radio Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for Radio Wiring Diagram (2 of 2) for Lexus LS 430 2003:

+b2
7 speaker
Acc
Audio & rear a/c control switch (w/ rear audio controller)
Aui+
Aui-
Auo+
Auo-
Bp (at left rear seat back)
C12
Combination meter
Fl+
Fl-
Fr+
Fr-
Gnd
J16
J17
Junction connector 16 & 17 (behind upper center of dash)
Junction connector 30 (rearward of right rear fenderwell)
Left front door speaker
Left front tweeter
Left rear door speaker
Left rear tweeter (9 speaker)
Ml+
Ml-
Mmut
Mr+
Mr-
Mtx+
Mtx-
Mute
N-mu
Navigation ecu (on lower right side of luggage compartment)
Nvmu
Pnk
Red
Right front door speaker
Right front tweeter
Right rear door speaker
Right rear tweeter (9 speaker)
Rl+
Rl-
Rr+
Rr-
Rtx+
Rtx-
S28
S29
S30
Sp+
Sp-
Spd
Spdo
Spi+
Spi-
Stereo component amplifier (on right side of luggage compt, behind trim)
T14
T15
Telephone transceiver & speaker relay (w/ link system: on right side of luggage compartment) (w/o link system: on left side of luggage compartment)
Tmut
Tx+
Tx-
W/ navigation
W/o navigation
Wfl+
Wfl-
Wfr+
Wfr-
Woofer

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for Lexus LS 430 2003

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List of elements for Shift Interlock Wiring Diagram for Lexus LS 430 2003:

Acc
D-acc fuse 7.5a
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
F18
Gauge fuse 7.5a
Hot at all times
Hot in acc or on
Hot in on or start
Ih (at right side of shift lever)
Ik (at right side of dash)
J/c 11 (behind upper center of dash)
Key interlock solenoid
Kls+
Red
Shift lock control ecu (below shift lever, in center console)
Stop fuse 5a
Stoplight switch (above brake pedal, on bracket)
Stp
Stpi
Unlock warning switch

STARTING/CHARGING

Charging Wiring Diagram for Lexus LS 430 2003

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List of elements for Charging Wiring Diagram for Lexus LS 430 2003:

Alt fusible link 140a
Alt-s fusible link 5a
Battery
Battery ground
C j16
C j17
Charge indicator
Combination meter
Computer data lines system
Cpu
Driver side j/b (at left kick panel)
Engine control module (on left front of engine compartment in protective case)
Engine room 1 r/b (on left front of engine compt, behind headlight)
Fr ig fuse 7.5a
Fusible link block (on right rear of engine compartment)
Gauge fuse 7.5a
Generator
Hot in on or start
Ih (at right side of shift lever)
Junction connector 1 & junction connector 2 (near engine control module, in protective case)
Junction connector 16 & junction connector 17 (behind upper center of dash)
Mpx1
Nca
Red

Starting Wiring Diagram for Lexus LS 430 2003

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List of elements for Starting Wiring Diagram for Lexus LS 430 2003:

Acc
Am2
Am2 fuse 30a
Battery
Battery ground
Control module (on left front of engine compt, in protective case)
E10
E2 (in engine harness, near ecu box)
Ee (on right cylinder head)
Engine room 1 r/b (on left front of engine compt, behind headlight)
Engine sta
Fusible link block (on right rear of engine compt)
Ignition switch
Junction connector 5 & junction connector 6 (near engine control module, in protective case)
Lock
Nca
Park/neutral position switch (on right side of transmission)
St2
Sta fuse 7.5a
Start
Starter
Starter relay

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Lexus LS 430 2003:

(at right side of firewall) ik
(near lower rear of left rear door opening) left rear side air bag sensor
+sl
+sr
-sl
-sr
A23
A24
A25
Air bag sensor assembly (behind lower center of dash, on transmission tunnel)
Air bag squib (steering wheel pad)
Anti-theft system
D2+
D2-
Driver side j/b (at left kick panel)
Escl
Escr
Esl
Esr
Fsr+
Fsr-
Gsw
Hot in on or start
Icl+
Icl-
Icr+
Icr-
Ig1
Ig2
Ig2 fuse 7.5a
J/c 23 (at left rear quarter panel)
Lbe+
Left air bag curtain shield squib
Left front buckle switch (in left front seat belt buckle)
Left front pretensioner
Left rear pretensioner
Left side air bag squib
Lsp+
Lsp-
Mpx-ig fuse 7.5a
Mpx1
Mpx2
P2+
P2-
Passenger side j/b (at right kick panel)
Pl+
Pl-
Plr+
Plr-
Pnk
Pr+
Pr-
Prr+
Prr-
Rbe+
Red
Right curtain shield air bag squib
Right front buckle switch (in right front seat belt buckle)
Right front pretensioner (near base of right "b" pillar)
Right front side air bag sensor (near base of right "b" pillar)
Right rear pretensioner (near base of right "c" pillar)
Right rear side air bag sensor (near lower rear of right rear door opening)
Right side air bag squib
Rl+
Rl-
Rr+
Rr-
Sfl+
Sfl-
Sfr+
Sfr-
Sil
Ssl+
Ssl-
Ssr+
Ssr-
Vucl
Vucr
Vupl
Vupr

Supplemental Restraints Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Lexus LS 430 2003:

(at right side of shift lever) ih
(right side of shift lever) ii
+sl
+sr
-sl
-sr
A/c control assembly
A11
Air bag
Air bag squib (front passenger air bag asssembly)
C12
Center cluster integration panel
Combination meter
Cpu
Data link connector 3 (partial) (below left side of dash)
Dbkl
Driver side j/b (at left kick panel)
Driver side j/b ecu (at left kick panel)
E10
Engine control module (on left front of engine compartment, in protective case)
Engine room 2 r/b (on left front of engine compartment, behind headlight)
Esl
F13
F15
Front controller
Gateway ecu (behind left end of dash)
Gauge fuse 7.5a
Hot in on or start
J16
J17
Junction connector (behind upper center of dash)
Junction connector 13 (behind upper center of dash)
Left front air bag sensor (on left front of engine compartment)
Left front side air bag sensor (near base of left "b" pillar)
Mpi1
Mpi2
Mpl2
Mpx +
Mpx -
Mpx-
Mpx1
Mpx2
Passenger side j/b (at right kick panel)
Passenger side j/b ecu
Right front air bag sensor (on right front of engine compartment)
Skid control ecu (behind left side of dash)
Solid state
Srs
Ssl+
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A/T Wiring Diagram (1 of 2) for Lexus LS 430 2003

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List of elements for A/T Wiring Diagram (1 of 2) for Lexus LS 430 2003:

(engine harn, left side of engine compt, under engine room j/b 1)
+b1
+bm
2002-03
Accelerator position sensor (behind left center of dash)
Batt
C15
Combination meter
Computer data lines system
Data link connector 3 (below left side of dash)
Driver side j/b (behind left kick panel)
Driver side j/b ecu (left kick panel)
Ec (radiator left side support)
Ect pwr
Ect snow
Efi 1 fuse 30a
Efi main relay
Electronically controlled transmission pattern select switch
Engine control module (ecm) (left front of engine compt, in protective case)
Engine room r/b 1 (left front of engine compt, behind headlight)
Epa
Eptk
Etcs fuse 10a
F15
Fr ig fuse 7.5a
Gauge fuse 7.5a
Hot at all times
Hot in on or start
Hot in start
Ign fuse 7.5a
Igsw
Ii (right side of shift lever)
Ik (right dash side panel)
J/c 1, j/c 2 (near ecm) j2
J/c 13 (upper center of dash)
J/c 16, j/c 17 (upper center of dash)
J/c 3 (near ecm)
J16
J16 j/c 16, j/c 17 (upper center of dash)
J17
Mil
Mpx-
Mpx1
Mpx2
Mrel
Passenger side j/b (behind right kick panel)
Passenger side j/b ecu (behind right kick panel)
Pnk/nlk
Pwr
Red
Short connector sc1, sc2 (near ecm)
Sil
Snow
Speedo
Sta
Sta fuse 7.5a
Stop fuse 5a
Stoplight switch (above brake pedal, on bracket)
Stp
Stpi
Stpo
Tac
Tach
Vcpa
Vpa
Vpa2
Vptk
Wfse
Wsfe

A/T Wiring Diagram (2 of 2) for Lexus LS 430 2003

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List of elements for A/T Wiring Diagram (2 of 2) for Lexus LS 430 2003:

(behind right kick panel) passenger side j/b
(left side of transmission) electronically controlled transmission solenoid
(right side of transmission) (integral to park/neutral position switch) a/t indicator light switch
At4
Atl
Braided
C10
C16
E01
E02
E03
Ee (side of right cylinder head)
Ef (side of left cylinder head)
Engine control module (ecm) (left front of engine compt, in protective case)
Engine coolant temperature sensor (front center of engine)
Eoil
Eta
Ethw
Ge01
J/c 4 (near ecm)
J/c 5 (near ecm)
Me01
Nca
Nco+
Nco-
Nssd
Nssl
O/d direct clutch speed sensor (left side of transmission)
Oil
Red
Shift lock control ecu (in center console, below shift lever)
Sln+
Sln-
Slt+
Slt-
Slu+
Slu-
Sp2+
Sp2-
Throttle control motor (on throttle body)
Throttle position sensor (on throttle body)
Thw
Vehicle speed sensor (on transmission)
Vta
Vta2

TRUNK, TAILGATE, FUEL DOOR

Fuel Door Release Wiring Diagram for Lexus LS 430 2003

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List of elements for Fuel Door Release Wiring Diagram for Lexus LS 430 2003:

(behind upper center of dash) j/c 14 & 15
Bu+
Bu-
Bubs
Combination switch
Driver side j/b (at left kick panel)
Driver side j/b ecu
E20
Fuel
Fuel lid opener motor (on left side of luggage compt, behind left rear fenderwell)
Fuel lid opener switch
Fuel opn fuse 10a
Fuel opn(o)
Fuel opn(p)
Gnd
Hot at all times
Ig (at left side of dash)
J/c 23 (rearward of left rear fenderwell)
J14
J15
L14
Luggage room j/b (on left side of luggage compartment)
Luggage room j/b ecu
Mpx+
Mpx-b
Mpx-b3 fuse 7.5a
Mpx1
Mpx2
P-gnd
Passenger side j/b (at right kick panel)
Power tilt & power telescopic ecu (behind left side of dash)
Red
Tx1