ENGINE PERFORMANCE – Lexus SC 430 2008 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L

4.3L, Engine Performance Wiring Diagram (1 of 6) for Lexus SC 430 2008

List of elements for 4.3L, Engine Performance Wiring Diagram (1 of 6) for Lexus SC 430 2008:

• (behind left kick panel) driver side j/b ecu
• (on top of brake pedal bracket) stop light switch
• +b1
• Accel position sensor (behind left center of dash)
• Acmg
• Air conditioning system
• B13
• B16
• Bat
• Batt
• Canh
• Canl
• Center j/b (behind right center of dash)
• Combination meter
• Computer data lines system
• Cooling fans system
• D12
• Data link connector 3 (behind left side of dash)
• Ect pwr ind
• Ect snow ind
• Engine control module (ecm) (at left side of engine compt, in ecu box)
• Epa
• Epa2
• Fpr
• Ht1b
• Ht2b
• Ig+
• Igsw
• Ih (under steering column)
• Imi
• Imo
• Mil ind
• Mpmp
• Mpx+b
• Mrel
• O1b-
• O2b-
• Ox1b
• Ox2b
• Pnk
• Ppnp
• Pr2
• Red
• Rfc
• S6 mpx1
• Skid control ecu (behind left end of dash)
• Sp1
• Spd
• Speedometer
• Sta
• Stp
• Stpi
• Stpo
• Tac
• Tach
• Tachometer
• Tam
• Vcp2
• Vcpa
• Vpa
• Vpa2
• Vpmp

4.3L, Engine Performance Wiring Diagram (2 of 6) for Lexus SC 430 2008

List of elements for 4.3L, Engine Performance Wiring Diagram (2 of 6) for Lexus SC 430 2008:

• (left side of dash, behind gauge assembly) transponder key computer
• 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
• Efii
• Efio
• 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, forward of strut tower)
• Etcs fuse 15a
• F/ pmp relay
• F16
• Fuel pump & sender (in fuel tank)
• Fuel pump resistor (at left rear of engine compt)
• Hot at all times
• Hot in on or start
• Ign fuse 5a
• J/c 17 (left rear of luggage compt)
• J/c 2 (in engine room r/b 2)
• J/c 3 (in engine room r/b 2) a
• Obd fuse 7.5a
• Red
• Stop fuse 5a

4.3L, Engine Performance Wiring Diagram (3 of 6) for Lexus SC 430 2008

List of elements for 4.3L, Engine Performance Wiring Diagram (3 of 6) for Lexus SC 430 2008:

• (in engine room r/b 2) j/c 2
• (on left side of engine compt, forward of strut tower) engine room r/b 2
• Acc
• Efi 2 fuse 10a
• Ekn2
• Eknk
• Engine control module (ecm) (at left side of engine compt, in ecu box)
• Hot at all times
• Ignition switch
• Knk1
• Knk2
• Knock sensor (bank 1) (on top center of engine)
• Knock sensor (bank 2) (on top center of engine)
• Lock
• Mol
• Mops
• Nca
• Nsw
• Oil pressure switch (on left front side of engine)
• Red
• Short pin 1
• Short pin 2
• Sp2+
• Sp2-
• Start
• Starter fuse 7.5a
• Starter relay
• Vehicle speed sensor (electronically controlled transmission) (on transmission)

4.3L, Engine Performance Wiring Diagram (4 of 6) for Lexus SC 430 2008

List of elements for 4.3L, Engine Performance Wiring Diagram (4 of 6) for Lexus SC 430 2008:

• (behind left kick panel) driver side j/b
• (behind right kick panel) passenger side j/b
• (left side of engine compt) j/c 23
• (on right front of engine) engine oil level sensor
• (on transmission) park/neutral position switch
• C14
• Canister pressure sensor
• Canister pump module (rear of vehicle chassis)
• Eb (right side of cylinder head)
• Ec (left side of cylinder head)
• F14
• F15
• Gnd
• Ih (under steering column)
• J/c 24 (left side of engine compt)
• J/c 4 & 5 (in ecu box)
• J/c 4 (in ecu box)
• Leak detection pump
• Level
• Nca
• P/n
• Sgnd
• Temp
• Vcc
• Vent valve
• Vout

4.3L, Engine Performance Wiring Diagram (5 of 6) for Lexus SC 430 2008

List of elements for 4.3L, Engine Performance Wiring Diagram (5 of 6) for Lexus SC 430 2008:

• (injector 1, 2, 4, 6 & 8: top right side of engine) (injector 3, 5 & 7: top left side of engine) fuel injectors
• (left side of engine compt) j/c 23
• (on top rear of engine)
• E2g
• Engine coolant temperature sensor (on top right side of engine)
• Engine room r/b 2 (on left side of engine compt, forward of strut tower)
• 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 converter)
• 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 converter)
• Hot in on or start
• Inj fuse 10a
• J/c 23 (left side of engine compt)
• Mass airflow (maf) meter (on right side of engine compt, in air intake duct)
• Nca
• Tha
• Vsv (acis) (on top right rear of engine)
• Vsv (purge)

4.3L, Engine Performance Wiring Diagram (6 of 6) for Lexus SC 430 2008

List of elements for 4.3L, Engine Performance Wiring Diagram (6 of 6) for Lexus SC 430 2008:

• (left side of engine compt) j/c 23 & 24
• (right side of cylinder head) eb
• (top left side of engine)
• (top right side of engine)
• +bm
• A a
• Acis
• Air conditioning system
• Camshaft position sensor (on left front of engine)
• Crankshaft position sensor (on left front of engine)
• E01
• E02
• E03
• E2g
• Eb (right side of cylinder head)
• Engine control module (ecm) (at left side of engine compt, in ecu box)
• G2-
• Ge01
• Ht1a
• Ht2a
• Igf
• Igf1
• Igf2
• 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
• Igt
• Igt1
• Igt2
• Igt3
• Igt4
• Igt5
• Igt6
• Igt7
• Igt8
• Inj 1
• Inj 2
• Inj 3
• Inj 4
• Inj 5
• Inj 6
• Inj 7
• Inj 8
• J/c 23 (left side of engine compt)
• J23
• J24
• Lcki
• Left camshaft timing oil control valve (top left side of engine)
• Left vvt sensor (on top left side of engine)
• Me01
• Nca
• Ne+
• Ne-
• O1a-
• O2a-
• Oc1+
• Oc1-
• Ocr+
• Ocr-
• Ox1a
• Ox2a
• Prg
• Red
• Right camshaft timing oil control valve (on top right side of engine)
• Right vvt sensor (on top right side of engine)
• Starting/charging system
• Tha
• Throttle body assembly (top center of engine)
• Thw
• Vta
• Vta1
• Vta2
• Vv1+
• Vv1-
• Vv2+
• Vv2-