ENGINE PERFORMANCE – Lexus SC 430 2003 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L

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

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

• (behind dash, right of steering column) transponder key amplifier
• (behind right side of dash) j/c 13
• (under steering column) ih
• +b1
• +bm
• A/c system
• Accel pedal position sensor (behind left center of dash)
• Acmg
• B16
• Batt
• C12
• C15
• Ccs
• Center j/b (behind right center of dash)
• Combination meter
• Computer data lines system
• Cooling fans system
• Cpu
• Cruise control system
• Data link connector 3 (behind left side of dash)
• Driver side j/b (behind left kick panel)
• E5 (near ecm)
• Ect pwr
• Ect snow
• Ed (rear of left fender)
• Efii
• Efio
• Eng+
• Eng-
• Engine control module (ecm) (at left side of engine compt, in ecu box)
• Ep1
• Ep2
• Epa
• Eptk
• Etam
• Fpr
• Htl2
• Htr2
• Igsw
• Imi
• Imo
• J/c 9 (behind top left end of dash)
• Mil ind
• Mpx1
• Mpx2
• Mrel
• Neo
• Oxl2
• Oxr2
• Pnk
• Pre
• Ptnk
• Red
• Rfc
• Sil
• Skid control ecu (behind left end of dash)
• Speedometer
• Sta
• Stp
• Tac
• Tach
• Tachometer
• Tam
• Tbp
• Trc+
• Trc-
• Vapor pressure sensor (under left rear of vehicle)
• Vcc
• Vcp1
• Vcp2
• Vcpa
• Vpa
• Vpa1
• Vpa2
• Vptk
• Wfse
• Wsfe

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

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

• (behind left kick panel) driver side j/b ecu
• (in ecu box) j/c 4, j/c 5
• (on top of brake pedal bracket) stoplight switch
• Cir opn relay
• D-ig fuse 10a
• Driver side j/b (behind left kick panel)
• Ed (rear of left fender)
• Efi fuse 25a
• Efi relay
• Engine room r/b 1 (on right side of engine compt, behind strut tower)
• Engine room r/b 2 (on left side of engine compt, behind strut tower)
• Etcs fuse 15a
• F/ pmp relay
• Fuel pump & sender (in fuel tank)
• Fuel pump resistor (left rear of engine compt)
• Hot at all times
• Hot in on or start
• J/c 17 (left quarter panel)
• J/c 2 (in engine room r/b 2)
• Red
• Stop fuse 5a
• Stpi
• Stpo
• Vsv (vapor pressure sensor) (under left rear of vehicle)

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

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

• (behind left kick panel) driver side j/b
• (engine harn, in ecu box)
• (generator) charging system
• (in engine room r/b 2) j/c 2
• (on left side of engine compt, behind strut tower) engine room r/b 2
• (on transmission) park/neutral position switch
• Acc
• Braided
• C14
• Ed (rear of left fender)
• Efi 2 fuse 10a
• Eknl
• Engine control module (ecm) (at left side of engine compt, in ecu box)
• Eoil
• Eol1
• F14
• Hot at all times
• Htl
• Ignition switch
• Knkl
• Knkr
• Left knock sensor (on top center of engine)
• Lock
• Mol
• Nco+
• Nco-
• O/d direct clutch speed sensor (on trans)
• Oil
• Oxl1
• P/n
• Red
• Right knock sensor (on top center of engine)
• Short pin 1
• Short pin 2
• Sln+
• Sln-
• Slt+
• Slt-
• Slu+
• Slu-
• Sp2+
• Sp2-
• Start
• Starter fuse 7.5a
• Starter relay
• Vehicle speed sensor (electronically controlled transmission) (on trans)

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

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

• (behind right kick panel) passenger side j/b
• (on right front of engine) engine oil level sensor
• (on transmission) a/t indicator light switch (integral to park/neutral position switch)
• (under center console, near selector lever) shift lock control ecu
• At4
• Atl
• Braided
• C10
• C16
• Driver side j/b
• Eb (right side of cyl head)
• Ec (left side of cyl head)
• Electronically controlled transmission solenoid (in transmission)
• Engine room r/b 2 (on left side of engine compt, behind strut tower)
• Hot in on or start
• Ign fuse 5a
• Inj fuse 10a
• J/c 4, j/c 5 (in ecu box)
• J/c 7 (in ecu box)
• J/c 9, j/c 10 (behind top left end of dash)
• J10
• Level
• Nssd
• Nssl
• Red
• Sln+
• Sln-
• Slt+
• Slt-
• Slu+
• Slu-
• Temp

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

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

• (engine wire harn, near breakout to fuel inj 5)
• (in ecu box) j/c 6
• (on top right side of engine) noise filter (ignition right bank)
• (right side kick panel) passenger side j/b ecu
• Braided
• E2 (engine wire harn, near breakout to ground eb)
• E2g
• Ec (left side of cyl head)
• Electronically controlled transmission pattern select switch
• Engine coolant temperature sensor (on top right side of engine)
• 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 left side of engine, in exhaust manifold)
• Heated oxygen sensor (bank 1 sensor 2) (on exhaust system, near catalytic conv)
• Heated oxygen sensor (bank 2 sensor 1) (on right side of engine, in exhaust manifold)
• Heated oxygen sensor (bank 2 sensor 2) (on exhaust system, near catalytic conv)
• Ih (under steering column)
• Mass airflow (maf) meter (on right side of engine compt, in air intake duct)
• Mpx-
• Pnk
• Pwr
• Snow
• Tha
• Vsv (acis) (on top right rear of engine)
• Vsv (canister closed valve) (on right side of engine)
• Vsv (evap) (on top rear of engine)

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

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

• (at top left rear of engine) noise filter (ignition left bank)
• (engine wire harn, near breakout to fuel inj 5)
• (engine wire harn, near breakout to ground eb)
• (in ecu box) j/c 6
• A/c system
• Acis
• Braided
• Camshaft position sensor (on left front of engine)
• Ccv
• Crankshaft position sensor (on left front of engine)
• E01
• E02
• E03
• Eb (right side of cyl head)
• Eb (side of right cyl head)
• Ec (left side of cyl head)
• Eg2
• Ene
• Engine control module (ecm) (at left side of engine compt, in ecu box)
• 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 top left side of engine)
• Left vvt sensor (on top left side of engine)
• Me01
• Mops
• Ne+
• Ne-
• Ocr+
• Ocr-
• Ocv+
• Ocv-
• Oil pressure switch (on left front side of engine)
• Oxr1
• Pnk
• Prg
• Red
• Right camshaft timing oil control valve (on top right side of engine)
• Right vvt sensor (on top right side of engine)
• Tha
• Throttle control motor (on throttle body)
• Throttle control sensor (on throttle body)
• Thw
• Vta
• Vta2
• Vvl+
• Vvl-
• Vvr+
• Vvr-