All Wiring Diagrams for Toyota MR2 2003 – Wiring diagrams for cars

AIR CONDITIONING

Manual A/C Wiring Diagram for Toyota MR2 2003

List of elements for Manual A/C Wiring Diagram for Toyota MR2 2003:

(at left rear of luggage compartment)
(at right kick panel) ih
(behind left corner of dash)
(in dash harness, behind lower center of dash) i8
(in dash harness, behind right center of dash) i10
(on left front strut tower) bl
(on rear of engine) eb
(on right front strut tower)
A/c comp relay
A/c condenser fan motor (on front of vehicle, on condenser)
A/c magnetic clutch & lock sensor (on lower left side of engine, on a/c compressor)
A/c switch
A/c thermistor (behind right side of dash, on hvac housing)
A/c triple pressure switch (on right side of front compartment, beside headlight)
Acmg
Blower resistor (behind right side of dash)
Blower motor (behind right end of dash)
Blower switch
C10
C11
C12
Cds fan fuse 30a
Combination meter
Def
Defogger system
Dual press
Engine control module (behind driver's seat, on panel)
Engine room r/b (in left side of engine compt, on firewall)
Fan
Fan 1 relay
Fan 2 relay
Fan 3 relay
Fan-ig fuse 7.5a
Fusible link block (in left front side of engine compartment)
Gnd
Hot at all times
Hot in on or start
Htr fuse 10a
Htr fuse 40a
Htr relay
Ie (at left kick panel)
If (behind left center of dash, on brace)
Interior lights system
J/b 6 (behind center of dash)
L a/c
Lcki
Off
Pre
R def
R/b 3
R/b 3 (behind left side of dash)
R/b 4 (in front compartment, on left front fenderwell)
R/b 4 (in front compt, on left front fenderwell)
Radiator fan motor
Rdi fan fuse 30a
Red
S a/c
Single press

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram for Toyota MR2 2003

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List of elements for Anti-lock Brakes Wiring Diagram for Toyota MR2 2003:

(in body harness, at left front of luggage compt)
(on left front strut tower) bl
+bm
+bs
Abs
Abs 1 fuse 30a
Abs 2 fuse 50a
Abs ind
B2 (in body harness, at left front of luggage compt)
Bm (on left front strut tower)
C10
C11
Combination meter
D/g
Data link connector (dlc) 3 (below left end of dash)
Ecu-ig fuse 7.5a
Engine control module (behind driver's seat, on panel)
Fl+
Fl-
Flo
Fr+
Fr-
Fro
Gauge fuse 7.5a
Gnd1
Gnd2
Hot at all times
Hot in on or start
Ig1
Ih (at right kick panel)
J/b 6 (behind center of dash)
Junction connector
Junction connector 4 (behind right end of dash)
Left front abs speed sensor (on left front wheel hub/spindle assembly)
Left rear abs speed sensor (on left rear wheel hub/ spindle assembly)
Parking brake switch (at base of parking brake lever)
Pkb
Pnk
R/b 3 (behind left corner of dash)
R/b 4 (in front compt, on left front fenderwell)
Red
Right front abs speed sensor (on right front wheel hub/spindle assembly)
Right rear abs speed sensor (on right rear wheel hub/spindle assembly)
Rl+
Rl-
Rlo
Rr+
Rr-
Rro
Sil
Skid control ecu with actuator (in front compt, on left front fenderwell)
Sp1
Speedometer
Spfl
Spfr
Sprl
Sprr
Stop fuse 15a
Stoplight switch (above brake pedal, on bracket)
Stp
Tra
Transmission control ecu (manual) (behind driver's seat, on panel)

ANTI-THEFT

Anti-theft Wiring Diagram for Toyota MR2 2003

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List of elements for Anti-theft Wiring Diagram for Toyota MR2 2003:

(in body harn, at left door sill) b7
A/c switch
Batt
Code
Ea (on left rear strut tower)
Efi main relay
Efi1 fuse 15a
Engine control module (behind driver's seat, on panel)
Engine room r/b (in left side of engine compt, on firewall)
Fusible link block (in left front side of engine compt)
Gnd
Hot at all times
If (behind left center of dash, on brace)
Imld
J/b 6 (behind center of dash)
Ksw
Mrel
Rxck
Security indicator light
Transponder key amplifier (behind left side of dash, near ignition key cylinder)
Txct
Unlock warning switch

BODY CONTROL MODULES

Body Control Modules Wiring Diagram for Toyota MR2 2003

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List of elements for Body Control Modules Wiring Diagram for Toyota MR2 2003:

Act+
Act-
Auto
Bdr1
Bdr2
Body ecu (behind left side of instrument cluster)
D p/w fuse 20a
Dcty
Ddn
Dmdn
Dmup
Door fuse 15a
Door locks & warning systems
Door locks system
Gauge fuse 7.5a
Hot at all times
Hot in on start
Ie (at left kick panel)
Ksw
Lswd
Lswp
P p/w fuse 20a
Pcty
Power windows system
Pwe
R/b 3 (behind left corner of dash)
Red
Ul1
Ul2
Ul3

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram for Toyota MR2 2003

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List of elements for Computer Data Lines Wiring Diagram for Toyota MR2 2003:

(in front compt, on left front fenderwell) skid control ecu with
A/b
Actuator
B12
B7 (in body harness, at left door sill)
Bat
C10
Center air bag sensor assembly (behind center of dash, forward of gear shifter)
Combination meter
D/g
Data link connector (dlc) 3 (below left end of dash)
Eb (on rear of engine)
Engine control module (behind driver's seat, on panel)
Hot at all times
Ie (at left kick panel)
J/b 6 (behind center of dash)
Junction connector 1 (behind upper right side of dash)
Obd fuse 7.5a
Power steering ecu (on left side of front compt)
R/b 3 (behind left corner of dash)
Sil
Transmission control ecu (behind driver's seat, on panel)

COOLING FAN

Cooling Fan Wiring Diagram for Toyota MR2 2003

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List of elements for Cooling Fan Wiring Diagram for Toyota MR2 2003:

(in body harness, at left quarterpanel) b12
A/c condenser fan motor (on front of vehicle, on condenser)
A/c triple pressure switch (on right side of front compartment, beside headlight)
Bi (on right front strut tower)
Bl (on left front strut tower)
Cds fan fuse 30a
Engine control module (behind driver's seat, on panel)
Engine controls system
Engine coolant temperature sensor (on rear of cylinder head)
Fan
Fan 1 relay
Fan 2 relay
Fan 3 relay
Fan-ig fuse 7.5a
Hot at all times
Hot in on or start
I8 (in dash harness, behind lower center of dash)
R/b 3 (behind left corner of dash)
R/b 4 (in front compt, on left front fenderwell)
Radiator fan motor
Rdi fan fuse 30a
Single press
Thw

CRUISE CONTROL

Cruise Control Wiring Diagram (1 of 2) for Toyota MR2 2003

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List of elements for Cruise Control Wiring Diagram (1 of 2) for Toyota MR2 2003:

(in left side of engine compartment, on firewall) engine room r/b
+bm
Acc
B10
B10 (in body harness, at left quarterpanel)
B7 (in body harness, at left door sill)
Batt
Cancel
Ccs
Cl+
Cl-
Cruise
Cruise control switch (combination switch)
E01
E02
E03
Ea (on left rear strut tower)
Eb (on rear of engine)
Ec (on rear of engine)
Ecc
Efi 1 fuse 15a
Efi main relay
Engine control module (behind driver's seat, on panel)
Etcs fuse 15a
Evg
Fusible link block (in left front side of engine compt)
Ge01
Harness, behind instrument cluster)
Hot at all times
Ig2 fuse 15a
Ig2 relay
Ignition switch
Igsw
J/c 3 & j/c 4 (behind right end of dash)
Lock
Me01
Mpx1
Mpx2
Mrel
Nsw
Red
Resume/ accel
Set/ coast
Sil
Spd
St1-
Start
Stoplight switch (above brake pedal, on bracket)
Stp
Tha
Throttle control motor (on top rear of engine)
Vpa
Vpa2
Vta
Vta2

Cruise Control Wiring Diagram (2 of 2) for Toyota MR2 2003

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List of elements for Cruise Control Wiring Diagram (2 of 2) for Toyota MR2 2003:

(in front of engine compt) accel position sensor
(on throttle body) throttle position sensor
B12
C10
C11
C12
Combination meter
Cruise ind
Data link connector (dlc) 3 (below left end of dash)
E2g
Eb (on rear of engine)
Gauge fuse 7.5a
Harness, at left quarterpanel)
Hot at all times
Hot in on or start
Ie (at left kick panel)
J/b 6 (behind center of dash)
Mass airflow meter (on left side of engine compt, on air intake duct)
Neutral start switch (near rear of engine)
R/b 3 (behind left corner of dash)
Sil
Speedometer
Stop fuse 15a
Tha

DEFOGGERS

Defoggers Wiring Diagram for Toyota MR2 2003

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List of elements for Defoggers Wiring Diagram for Toyota MR2 2003:

Bk (near right door striker)
C11
Combination meter
Def fuse 25a
Diode (idel-up) (behind upper center of dash)
Gauge fuse 7.5a
Gnd
Hot at all times
Hot in on or start
I/up fuse 7.5a
Ie (at left kick panel)
If (behind left center of dash, on brace)
J/b 6 (behind center of dash)
Junction connector 3 & 4 (behind right end of dash)
Noise filter (rear window defogger) (behind left end of dash)
R-def
R/b 3 (behind left corner of dash)
Rear window defogger
Rear window defogger relay (behind left end of dash, near r/b 3)
Rear window defogger switch (a/c switch)
Short connector (rear window defogger) (in rear of right quarterpanel)

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Toyota MR2 2003

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List of elements for Electronic Power Steering Wiring Diagram for Toyota MR2 2003:

Bl (on left front strut tower)
Bm (on left front strut tower)
C10
C11
Combination meter
Data link connector (dlc) 3 (below left end of dash)
Ecu-ig fuse 7.5a
Efi
Ehps fuse 50a
Ehps relay
Engine control module (behind driver's seat, on panel)
Gauge fuse 7.5a
Harness, behind intrument cluster)
Hot at all times
Hot in on or start
Idup
Ie (at left kick panel)
Igb
Ih (at right kick panel)
J/b 6 (behind center of dash)
Mrly
Pgnd
Power steering ecu (on left side of front compt)
Power steering warning light
Psct
R/b 3 (behind left corner of dash)
R/b 4 (in front compt, on left front fenderwell)
Sil
Spd

ENGINE PERFORMANCE

1.8L

1.8L, Engine Performance Wiring Diagram (1 of 3) for Toyota MR2 2003

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List of elements for 1.8L, Engine Performance Wiring Diagram (1 of 3) for Toyota MR2 2003:

(behind driver's seat)
(dash harn, behind upper center of dash) i4
(driver's door sill) b7
(under right center pillar)
A/c system
Abs
Acc
Acmg
B7 (driver's door sill)
Batt
C10
C11
C12
Circuit opening relay
Code
Combination meter
Cooling fans system
Ea (left rear cylinder head)
Efi 1 fuse 15a
Efi 2 fuse 7.5a
Efi main relay
Electronic power steering system
Engine control module (behind driver's seat, on panel)
Engine room r/b (on left side of firewall)
F/ps
Fan
Fuel pump (in fuel tank)
Fusible link block (in left front corner of engine compt)
Gauge fuse 7.5a
Gnd
Hot at all times
Hot in on or start
Hot in start
If (left instrument panel brace)
Ig2 fuse 15a
Ig2 relay
Ignition switch
Igsw
Imld
Instrument cluster system
J/b 6 (behind center of dash)
Ksw
Lcki
Lock
Malf ind
Mpx1
Mpx2
Mrel
Nsw
Power steering system (power steering ecu)
Pre
Psct
Ptnk
R/b 3 (behind left corner of dash)
Rxck
Security indicator light (a/c switch)
Sil
Skid control ecu (on left front fenderwell)
Spd
St fuse 7.5a
Sta
Start
Starting/ charging system (st relay)
Std
Stp
Tach
Tbp
Tra
Transmission system
Transponder key amplifier (behind left side of dash, near ignition key cyl)
Txct
Unlock warning switch (center of dash)
Vsv (pressure switching valve) (under rear of vehicle)
W/ sequential m/t

1.8L, Engine Performance Wiring Diagram (2 of 3) for Toyota MR2 2003

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List of elements for 1.8L, Engine Performance Wiring Diagram (2 of 3) for Toyota MR2 2003:

(behind driver's seat)
(engine harn, left center of firewall)
(engine harn, left front of engine compt)
(in left quarter panel) j/c 5
(on bracket, above brake pedal) stoplight switch
(under right rear of vehicle) vapor pressure sensor
B10
B10 (behind driver's seat)
B12
Center airbag sensor assembly (behind center of dash)
D j/c 3
Data link connector 3 (partial) (under left end of dash)
Duty
E4 (engine harn, center of fire- wall)
Eb (left engine block)
Ec (left engine block)
Etcs fuse 15a
F j/c 4
Fusible link block (in left front corner of eng compt)
Gnd
Gsw2
Hot at all times
Idle air control valve (front of engine compt)
Ignition coil & igniter 1 (top of cylinder head)
Ignition coil & igniter 2 (top of cylinder head)
Ignition coil & igniter 3 (top of cylinder head)
Ignition coil & igniter 4 (top of cylinder head)
Injector 1
Injector 2
Injector 3
Injector 4
J/b 6 (behind center of dash)
J/c 3, j/c 4 (behind right end of dash)
Nca
Nca nca
Noise filter (ignition) (on rear of cylinder head)
Ptnk
R/b 3 (behind left corner of dash)
Short connector (srs no. 2) (behind left end of dash)
Sil
Stop fuse 15a
Vcc
Visc
Vsv (canister closed valve) (left rear of engine compt)
W/ sequential m/t
W/o sequential m/t

1.8L, Engine Performance Wiring Diagram (3 of 3) for Toyota MR2 2003

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List of elements for 1.8L, Engine Performance Wiring Diagram (3 of 3) for Toyota MR2 2003:

(in front of eng compt) accel position sensor
(left front of engine compt) vsv (evap)
(left rear of cylinder head) camshaft position sensor
(left side of eng compt, on air intake duct) mass airflow meter
(left side of engine) crankshaft position sensor
(on rear of cylinder head) engine coolant temp sensor
(on throttle body) throttle position sensor
+bm
B10
B12
B12 (behind driver's seat)
Camshaft timing oil control valve (on left front of cylinder head)
Can+
Can-
Ccv
Cl+
Cl-
Csmt
E01
E02
E03
E2g
Eb (left engine block)
Ec (left engine block)
Engine control module (behind driver's seat, on panel)
Evg
Evp1
Generator
Geo1
Heated oxygen sensor (bank 1, sensor 1) (on exhaust system)
Heated oxygen sensor (bank 1, sensor 2) (on exhaust system)
Heated oxygen sensor (bank 2, sensor 1) (on exhaust system)
Ht1a
Ht1b
Ht2a
Igf
Igt1
Igt2
Igt3
Igt4
Knk1
Knock sensor (left side of engine block)
Meo1
Mops
Nca
Nca nca
Ne+
Ne-
Neo
Ocv+
Ocv-
Oil pressure switch (on left side of engine)
Ox1a
Ox1b
Ox2a
Red
Rso
Splice b10 & b12 - (behind driver's seat)
Tha
Throttle control motor (top rear of engine)
Thw
Transmission system
Vpa
Vpa2
Vta
Vta2
W/ sequential m/t
W/o sequential m/t

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Toyota MR2 2003

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List of elements for Back-up Lamps Wiring Diagram for Toyota MR2 2003:

(in body harness, behind left seat) b8
B12
B12 (in body harness, at left quarterpanel)
Back-up light switch (on transmission)
Back-up light switch 2 (sequential m/t) (on transmission)
Ea (on left rear strut tower)
Ed (on right rear strut tower)
Gauge fuse 7.5a
Hot in on or start
Left back-up light
Left rear combination light
R/b 3 (behind left corner of dash)
Right back-up light
Right rear combination light
Rsw
Transmission control ecu (behind driver's seat, on panel)

Exterior Lamps Wiring Diagram for Toyota MR2 2003

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List of elements for Exterior Lamps Wiring Diagram for Toyota MR2 2003:

(at left kick panel) ie
(in body harness, at left quarterpanel)
(in dash harness, behind lower center of dash) i8
(in dash harness, behind upper right side of dash) i9
B11
B5 (in body harness, at right quarterpanel)
Bi (on right
Bi (on right front strut tower)
Bl (on left
Bl (on left front strut tower)
C10
C14
Combination meter
Combination switch
E j3
E j4
Ea (on left
Ea (on left rear strut tower)
Ed (on right rear strut tower)
Front strut tower)
Fusible link block (in left front side of engine compartment)
Haz fuse 15a
Hazard switch
Head
High mount stop light
Hot at all times
Hot in on or start
I12
I12 (in dash harness, behind right side of dash)
Ih (at right kick panel)
J/c 3 & 4 (behind right end of dash)
J3 d
Left front parking light
Left front side marker light
Left front turn signal light
Left license plate light
Left rear combin- ation light
Light control switch
Off
R/b 3 (behind left corner of dash)
Rear strut tower)
Right front parking light
Right front side marker light
Right front turn signal light
Right license plate light
Right rear combin- ation light
Stop
Stop fuse 15a
Stoplight switch (above brake pedal, on bracket)
Tail
Tail 1 fuse 20a
Tail 2 fuse 10a
Tail relay
Turn
Turn fuse 7.5a
Turn signal flasher relay (behind left side of dash, left of instrument cluster)
Turn signal indicator lights
Turn signal switch

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 2) for Toyota MR2 2003

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List of elements for Ground Distribution Wiring Diagram (1 of 2) for Toyota MR2 2003:

(in front compt, on left front fenderwell) r/b 4
(in front compt, on right front fenderwell) r/b 5
(left front wheelwell) b2
(on left side of firewall, in engine compt) engine room r/b
A/c dual pressure switch
A/c magnetic clutch & lock sensor
A/c single pressure switch
Auto antenna relay
B1 (luggage room harn, right front wheelwell)
B10
B10 (engine harn, left rear wheelwell)
B12 (engine harn, left rear wheel well)
B4 (luggage room harn, left front wheelwell)
B6 (floor harn, right rear wheelwell)
Bi (right front cylinder head)
Bj (right front cylinder head)
Bk (under right center pillar)
Bl (left front cylinder head)
Bm (left front cylinder head)
Bn (under left center pillar)
Brake fluid warning switch
Clutch start switch
Combination switch
Data link connector
Daytime running light relay
Drl relay 4
E1 (fusible link block)
E3 (engine harn, top left of engine)
E4 (engine harn, on top of engine)
E5 (floor harn, right rear wheel- well)
Ea (left rear cylinder head)
Eb (left engine block)
Ec (left engine block)
Ed (right rear cylinder head)
Efi main relay
Engine control module
Fan relay 2
Front wiper motor
Fuel pump
Heated oxygen sensor (bank 1 sensor 1)
Heated oxygen sensor (bank 1 sensor 2)
Heated oxygen sensor (bank 2 sensor 1)
High mounted stop light
Hydraulic power unit
Idle air control valve
Ig2 relay
Ignition coil & igniter 1
Ignition coil & igniter 2
Ignition coil & igniter 3
Ignition coil & igniter 4
Left buckle switch & tension reducer
Left front fog light
Left front parking light
Left front side marker light
Left front turn signal light
Left headlight (low)
Left license plate light
Left rear combination light
Neutral start switch
Power steering ecu
Radiator fan motor
Rear window defogger
Right buckle & seat belt warning occupant detection sensor
Right front fog light
Right front parking light
Right front side marker light
Right front turn signal light
Right headlight (low)
Right license plate light
Right rear combination light
Shift lever position sensor
Shift lock control ecu
Short connector (right rear of passenger compt)
Skid control ecu w/ actuator
Trans- mission control ecu
Transmission control ecu
W/ sequential m/t

Ground Distribution Wiring Diagram (2 of 2) for Toyota MR2 2003

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List of elements for Ground Distribution Wiring Diagram (2 of 2) for Toyota MR2 2003:

(behind left corner of dash) r/b 3
A/c switch
Acc relay
Blower resistor
Blower switch
Body ecu
C10
C11
Center air bag sensor assembly
Cigarette lighter
Clock
Com- bination meter
Combination meter
Combination switch
Data link con- nector
Door lock control switch
Heater relay
I1 (i/p harn, left kick panel)
I3 (i/p harn, top left of dash)
I5 (in dash harn, behind upper center of dash)
I9 (i/p harn, top right of dash)
Ie (left kick panel)
If (left instrument panel brace)
Ig (right instrument panel brace)
Ig1 relay
Ih (right kick panel)
J/b 6 (behind center of dash)
Left door motor door key lock & unlock switch & door unlock detection switch
Left power window control switch
Noise filter (rear window defogger)
Passenger air bag manual on/off switch
Radio & player
Remote control mirror switch
Rheostat
Right door motor door key lock & unlock switch & door unlock detection switch
Short connector (under left side of dash)
Transponder key amplifier
Turn signal flasher relay
Unlock warning switch
Window lock switch

HEADLIGHTS

Headlights Wiring Diagram for Toyota MR2 2003

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List of elements for Headlights Wiring Diagram for Toyota MR2 2003:

(behind left corner of dash) r/b 3
(in dash harness, behind lower center of dash)
(in dash harness, behind lower center of dash) i8
(in front compartment, on right front fenderwell) r/b 5
(in front compt, on left front fenderwell) r/b 4
(in left front side of engine compartment) fusible link block
Bi (on right front strut tower)
Bl (on left front strut tower)
Brake fluid level warning switch (in front compt, on brake master cylinder reservoir)
Brk
C10
C11
C14
Chg-
Combination meter
Combination switch
Daytime running light relay (behind upper left side of dash)
Dim relay
Dimmer switch
Diode (drl) (behind left center of dash)
Diode (idle-up) (behind upper center of dash)
Drl
Drl 1 fuse 7.5a
Drl 4 relay
Ecu-b fuse 10a
Flash
Fr fog fuse 15a
Fr fog relay
Front fog light switch
Gauge fuse 7.5a
Generator
H-lp
Harness, behind center of dash)
Head
Head relay
High
High beam ind
Hot at all times
Hot in on or start
I/up fuse 7.5a
Ie (at left kick panel)
Ih (at right kick panel)
Ind
J/b 6 (behind center of dash)
Junction connector 3 & 4 (behind right end of dash)
Left front foglight
Left headlight (high)
Left headlight (low)
Left lwr head fuse 10a
Left upr head fuse 10a
Light control switch
Low
Main fuse 40a
Off
Parking brake switch (at base of parking brake lever)
Pkb
R/b 5 (in front compt, on right front fenderwell)
Red
Red red
Right front foglight
Right headlight (high)
Right headlight (low)
Right lwr head fuse 10a
Right upr head fuse 10a
Tail

HORN

Horn Wiring Diagram for Toyota MR2 2003

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List of elements for Horn Wiring Diagram for Toyota MR2 2003:

Combination switch
Engine room r/b (in left side of engine compt, on firewall)
Fusible link block (in left front side of engine compt)
Horn fuse 10a
Horn relay
Horn switch
Hot at all times
Left horn
Right horn

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram for Toyota MR2 2003

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List of elements for Instrument Cluster Wiring Diagram for Toyota MR2 2003:

(in dash harness,
(on left front strut tower) bl
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
Abs ind
Acc
Air conditioning system
Am2
Anti-lock brakes system
B10
B11
B12
B13
B14
B15
B16
B17
B18
Behind instrument cluster)
Brake fluid level warning switch (in front compt, on brake master cylinder reservoir)
Brake ind
Buzzer
C10
C11
C12
Charge ind
Clock
Combination meter
Cruise control system
Cruise ind
D j4
Defogger system
Dome fuse 10a
Door ind
Ecu-b fuse 10a
Electronic power steering system
Engine control module (behind driver's seat, on panel)
Engine controls system
Exterior lights system
Fuel gauge
Fuel ind
Fuel pump & fuel sender (in fuel tank)
Gauge fuse 7.5a
Headlights system
High beam ind
Hot at all times
Hot in acc or on
Hot in on or start
Hot w/tail relay energized
Ie (at left kick panel)
If (behind left center of dash, on brace)
Ig2
Ignition switch
Ih (at right kick panel)
Interior lights system
J/b 6 (behind center of dash)
J3 f
Junction connector 3 & 4 (behind right end of dash)
Junction connector 4 (behind right end of dash)
Left turn ind
Lock
Malfunction ind lamp
Meter illumination
Mpx1
Mpx2
Odo/ trip
Oil ind
P/s ind
Panel fuse 7.5a
Power steering ecu (on left side of front compt)
R/b 3 (behind left corner of dash)
Radio 2 fuse 7.5a
Red
Right turn ind
Seat belt ind
Sequential manual transmission
Sequential manual transmission shift position
Spd
Speedometer
Srs ind
Start
Tach
Tachometer
Temperature gauge
Warning system
Warning systems

INTERIOR LIGHTS

Courtesy Lamp Wiring Diagram for Toyota MR2 2003

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List of elements for Courtesy Lamp Wiring Diagram for Toyota MR2 2003:

B7 (in body harness, at left door sill)
C10
C11
Combination meter
Diode (door courtesy) (behind upper center of dash)
Dome fuse 10a
Door
Door ind
Dswd
Ecu-b fuse 10a
Hot at all times
I4 (in dash harness, behind instrument cluster)
Ie (at left kick panel)
Ih (at right kick panel)
Interior light
Junction connector 3 & 4 (behind right end of dash)
Left door courtesy switch
Off
R/b 3 (behind left corner of dash)
Red
Right door courtesy switch
Solid state
Transmission control ecu (sequential m/t) (behind driver's seat, on panel)

Instrument Illumination Wiring Diagram for Toyota MR2 2003

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List of elements for Instrument Illumination Wiring Diagram for Toyota MR2 2003:

A/c switch
C10
C11
C12
Combination meter
Floor console)
Front fog light switch
Hazard switch
Head
Hot at all times
I3 (in dash harness, behind instrument cluster)
Ie (at left kick panel)
Ih (at right kick panel)
Illumination
J/b 6 (behind center of dash)
Light control switch (combination switch)
Off
Panel fuse 7.5a
R/b 3 (behind left corner of dash)
Radio & player
Rheostat
Shift lock control ecu (sequential m/t) (below
Solid state
Tail
Tail 1 fuse 20a
Taillight relay

PASSIVE RESTRAINTS

Passive Restraints Wiring Diagram for Toyota MR2 2003

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List of elements for Passive Restraints Wiring Diagram for Toyota MR2 2003:

(at left kick panel)
Bk (near right door striker)
Buckle switch (left) & tension reducer (under driver's seat)
Buzzer
C10
C11
Combination meter
Ecu-b fuse 10a
Gauge fuse 7.5a
Gnd
Hot at all times
Hot in on or start
If (behind left center of dash, on brace)
Ih (at right kick panel)
J/b 6 (at base of right door opening)
J/c 6 (at base of right door opening)
Left tension reducer solenoid (at left quaterpanel)
Passenger's seat belt warning light (a/c switch)
R/b 3 (behind left corner of dash)
Right buckle switch & occupant detection sensor
Seat belt ind

POWER ANTENNA

Power Antenna Wiring Diagram for Toyota MR2 2003

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List of elements for Power Antenna Wiring Diagram for Toyota MR2 2003:

(on right rear of vehicle, on power antenna assembly)
Acc
Ant
Ant+
Auto antenna motor (on right rear of vehicle)
Auto antenna relay
Bk (near right door striker)
Down
Gauge fuse 7.5a
Gnd
Hot at all times
Hot in acc or on
Hot in on or start
J/b 6 (behind center of dash)
R/b 3 (behind left corner of dash)
Radio & player
Radio 1 fuse 15a
Radio 2 fuse 7.5a

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 2) for Toyota MR2 2003

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List of elements for Power Distribution Wiring Diagram (1 of 2) for Toyota MR2 2003:

Alt fuse 100a
Alt-s fuse 7.5a
Am2 fuse 15a
B7 (engine harn, left door sill)
Battery
C/open relay
Daytime running light relay, combination meter
Dim relay
Dome fuse 10a
Drl 1 fuse 7.5a
Drl 4 relay
Ecu-b fuse 10a
Ecu-b1 fuse 25a
Efi main relay
Efi1 fuse 15a
Efi2 fuse 7.5a
Engine control module
Engine controls system
Engine room r/b (on left side of firewall, in eng compt)
Etcs fuse 15a
From fusible a link block (diagram 1 of 2)
From splice b7 (diagram 2 of 2)
Fuel pump
Fusible link block (in left front corner of engine compt)
Generator
Haz fuse 15a
Hazard switch
Head relay
Horn fuse 10a
Horn relay
Hpu fuse 30a
Hpu relay
Htr fuse 40a
Htr relay
Hydraulic power unit
Ig2 fuse 15a
Ig2 relay
Interior light, combination meter clock
Left headlight
Lh lwr head fuse 10a
Lh upr head fuse 10a
Main fuse 40a
R/b 3 (behind left corner of dash)
R/b 5 (on right front fenderwell)
Radio & player, auto antenna relay
Radio1 fuse 15a
Red
Rh lwr head fuse 10a
Rh upr head fuse 10a
Right headlight
Smt-ig fuse 10a
St fuse 7.5a
St relay
Starter
Stm-b fuse 10a
To fusible link block (diagram 1 of 2)
To ignition switch (diagram 2 of 2)
To r/b 3 (diagram 2 of 2)
To r/b 4 (diagram 2 of 2)
Transmission control ecu
Transponder key amplifier

Power Distribution Wiring Diagram (2 of 2) for Toyota MR2 2003

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List of elements for Power Distribution Wiring Diagram (2 of 2) for Toyota MR2 2003:

A j/c 3
A/c switch (passenger air bag manual on/off indicator)
Abs mtr relay
Abs sol relay
Abs1 fuse 30a
Abs2 fuse 50a
Ac switch, radio & player, hazard switch, combination meter, clock, shift lock control ecu
Acc
Acc fuse 25a
Acc relay
Am1
Am1 fuse 7.5a
Am2
B7 (engine harn, left door sill)
Body ecu
C j/c 4
C/opn relay, ig2 relay, combination meter, center air bag sensor assembly
Cds fan fuse 30a
Center air bag sensor assembly
Cig fuse 15a
Cigarette lighter
Clock, remote control mirror switch, radio & player, auto antenna relay, combination meter
Combination meter
Combination meter, generator, daytime running light relay, back-up light switch, body ecu, left tension reducer solenoid, auto antenna relay, rear window defogger relay
D pw fuse 20a
Data link connector 3
Def fuse 25a
Diode (idle up) (behind upper center of dash)
Door fuse 15a
Ecu-ig fuse 7.5a
Ehps fuse 50a
Ehps relay
Ehps relay, power steering ecu, abs ecu
Fan 1 relay
Fan 2 relay, fan 1 relay
Fan 3 relay
Fan-ig fuse 7.5a
From fusible link block (alt fuse) (diagram 1 of 2)
From fusible link block (am2 fuse) (diagram 1 of 2)
From r/b 3 (ig1 relay) (diagram 2 of 2)
Front wiper motor, front wiper & washer switch
Gauge fuse 7.5a
Hazard switch
Htr fuse 10a
Htr relay, a/c switch, a/c comp relay
I/up fuse 7.5a
Ie (left kick panel)
If (left instrument panel brace)
Ig1
Ig1 relay
Ig2
Ignition switch
J/b 6 (behind center of dash)
J/c 3, j/c 4 (right end of dash
License plate lights, rear combination lights, front side marker lights, front parking lights
Lock
Obd fuse 7.5a
P pw fuse 20a
Panel fuse 7.5a
Pnk
R/b 3 (behind left corner of dash)
R/b 4 (on left front fenderwell)
Radio2 fuse 7.5a
Rdi fan fuse 30a
Rear window defogger
Rear window defogger relay (behind left end of dash)
Red
Srs fuse 7.5a
St relay
St2
Start
Stop fuse 15a
Stoplight switch
Tail relay
Tail1 fuse 20a
Tail2 fuse 10a
To fuse smt-ig (diagram 1 of 2)
To r/b 3 (ecu-ig fuse) (diagram 2 of 2)
Turn fuse 7.5a
Washer fuse 10a
Washer motor
Wiper fuse 20a

POWER DOOR LOCKS

Power Door Locks Wiring Diagram for Toyota MR2 2003

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List of elements for Power Door Locks Wiring Diagram for Toyota MR2 2003:

(in dash harness, near left kick panel) i1
(in dash harness, near left kick panel) i2
Act+
Act-
Body ecu (behind left side of instrument cluster)
Dcty
Door fuse 15a
Door lock control switch lock
Gauge fuse 7.5a
Hot at all times
Hot in on or start
I2 (in dash harness, near left kick panel)
Ie (at left kick panel)
If (behind left center of dash, on brace)
Ih (at right kick panel)
Junction block 6 (behind center of dash)
Junction connector 3 & 4 (behind right j3 end of dash)
Ksw
Left door courtesy switch
Left door lock motor, door key lock & unlock switch & door unlock detection switch
Lswd
Lswp
Pcty
R/b 3 (behind left corner of dash)
Red
Right door courtesy switch
Right door lock motor, door key lock & unlock switch & door unlock detection switch
Ul1
Ul2
Ul3
Unlk
Unlock warning switch

POWER MIRRORS

Power Mirrors Wiring Diagram for Toyota MR2 2003

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List of elements for Power Mirrors Wiring Diagram for Toyota MR2 2003:

Down
Hot in acc or on
I2 (in dash harness, near left kick panel)
Ie (at left kick panel)
J/b 6 (behind center of dash)
Left
Left remote control mirror
Operation switch
R/b 3 (behind left corner of dash)
Radio 2 fuse 7.5a
Remote control mirror switch
Right
Right remote control mirror
Select switch

POWER WINDOWS

Power Windows Wiring Diagram for Toyota MR2 2003

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List of elements for Power Windows Wiring Diagram for Toyota MR2 2003:

(at left kick panel) ie
Auto
Auto down
Bdr1
Bdr2
Body ecu (behind left side of instrument cluster)
D p/w fuse 20a
Ddn
Dmdn
Dmup
Down
Gauge fuse 7.5a
Hot at all times
Hot in on or start
Ih (at right kick panel)
Left power window control switch
Left power window motor
P p/w fuse 20a
Pwe
R/b 3 (behind left corner of dash)
Red
Right power window control switch
Right power window motor
Under front of center console)
Window lock switch

RADIO

Radio Wiring Diagram for Toyota MR2 2003

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List of elements for Radio Wiring Diagram for Toyota MR2 2003:

Acc
Ant
Auto antenna relay (on right rear of vehicle, on power antenna assembly)
Fl+
Fl-
Fr+
Fr-
Gnd
Hot at all times
Hot in on or acc
Ig (behind right center of dash, on brace)
Ill
Interior lights system
J/b 6 (behind center of dash)
Left front door speaker
Left tweeter speaker
Pnk
R/b 3 (behind left corner of dash)
Radio & player
Radio fuse 15a
Radio fuse 7.5a
Right front door speaker
Right tweeter speaker

STARTING/CHARGING

Charging Wiring Diagram for Toyota MR2 2003

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List of elements for Charging Wiring Diagram for Toyota MR2 2003:

Alt fuse 100a
Alt-s fuse 7.5a
Battery
Battery ground
C10
C11
C12
Charge ind
Combination meter
Engine control module (behind driver's seat, on panel)
Fusible link block (in left front side of engine compt)
Gauge fuse 7.5a
Generator
Hot in run or start
Ih (at right kick panel)
Mpx1
Mpx2
Nca
R/b 3 (behind left corner of dash)
Red/

Starting Wiring Diagram for Toyota MR2 2003

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List of elements for Starting Wiring Diagram for Toyota MR2 2003:

Acc
Am2 fuse 15a
Battery
Battery ground
Bi (on right front strut tower)
Clutch start switch (above brake pedal, on bracket)
E1 (in engine harness, at left front of engine compt)
Engine control module (behind driver's seat, on panel)
Fusible link block (in left front side of engine compt)
Ignition switch
M/t
Main fuse 40a
Nca
Off
Red
Sequential m/t
St fuse 7.5a
Sta
Start
Starter
Starter relay
Std

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram for Toyota MR2 2003

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List of elements for Supplemental Restraints Wiring Diagram for Toyota MR2 2003:

(at left kick panel) ie
(at right kick panel) ih
(near right door striker) bk
+sl
+sr
-sl
-sr
Acc
Air bag squib (steering wheel pad)
Am2
C10
C11
Center air bag sensor assembly (behind center of dash, forward of gear shifter)
Combination meter
Data link connector (dlc) 3 (partial) (below left end of dash)
Engine control module (behind driver's seat, on panel)
F/ps
Gauge fuse 7.5a
Gsw2
Hot at all times
Hot in on or start
Ig1
Ig2
Ignition switch
J/b 6 (behind center of dash)
J/c 1 (behind upper right side of dash)
J/c 6 (at base of right door opening)
Lbe+
Left buckle switch & tension reducer (under driver's seat)
Left front air bag sensor (on left side of front compartment, beside left headlight assembly)
Left pretensioner (in left quarter panel)
Lock
Off
Passenger air bag manual on/off indicator (part of a/c switch)
Passenger air bag manual on/off switch
Passenger's air bag assembly (air bag squib)
Pl+
Pl-
Pr+
Pr-
R/b 3 (behind left corner of dash)
Right front air bag sensor (on right side of front compartment, beside right headlight assembly)
Right pretensioner (in right quarter panel)
Short connector (srs 1) (partial) (behind left end of dash)
Short connector (srs 2) (behind left end of dash)
Sil
Solid state
Srs
Srs fuse 7.5a
Start