Diagram sections — 33 (68 total)
AIR CONDITIONING ANTI-LOCK BRAKES ANTI-THEFT BODY CONTROL MODULES COMPUTER DATA LINES COOLING FAN CRUISE CONTROL DEFOGGERS ELECTRONIC POWER STEERING ENGINE PERFORMANCE EXTERIOR LIGHTS GROUND DISTRIBUTION HEADLIGHTS HORN INSTRUMENT CLUSTER INTERIOR LIGHTS MEMORY SYSTEMS NAVIGATION PASSIVE RESTRAINTS POWER ANTENNA POWER DISTRIBUTION POWER MIRRORS POWER SEATS POWER TOP/SUNROOF POWER WINDOWS RADIO SHIFT INTERLOCK STARTING/CHARGING SUPPLEMENTAL RESTRAINTS TRANSMISSION TRUNK, TAILGATE, FUEL DOOR WARNING SYSTEMS WIPER/WASHER
AIR CONDITIONING Automatic A/C Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Automatic A/C Wiring Diagram (1 of 2) for Lexus SC 430 2005: 76 (behind center of dash) air foot control servo motor (in engine 4 harness, near breakout to positive battery cable) e1 (under steering column) A/c control assembly (behind center of dash) A/c room temperature sensor (behind center of dash) A/c thermistor (behind center of dash) A10 Acc Aif Air Amcdr Amcpa Amhdr Amhpa Aod Aof Automatic light control sensor & a/c solar sensor (behind upper right side of dash) Blower motor (behind lower right side of dash) Blower motor controller (behind right side of dash) Blw C11 Cls Computer data lines system Dgs Driver side j/b (behind left kick panel) Emop Emt1 Engine room 1 r/b (on right side of engine compt, behind strut tower) Exhaust gas sensor (at left front of engine compt) Exterior lights system F11 Fan 2 fuse 40a Fan fuse 40a Ft2cl Ft2op Gas Gnd Hazd Heater fuse 10a Heater fuse 50a Hot at all times Hot in on or start Ill+ Instrument panel j/b (behind upper center of dash) Interior lights system Junction connector 14 (behind right side of dash) Mpx+ Mpx- Mpx-ig fuse 7.5a Multi- display Open Opn Pnk Power tops system Re1 Re2 Red Reos S5-1 S5-2 Sg-1 Sg-2 Sg-3 Sg-4 Sw1 Sw2 Swe Tilt Tp1 Tpdr Tpo Tppa Tsdr Tsl Tspa Tsr Automatic A/C Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Automatic A/C Wiring Diagram (2 of 2) for Lexus SC 430 2005: 58 (in a/c sub 2 wire harness, near connector for driver's side air mix control servo motor) (on left side of engine compt, forward of strut tower) engine room 2 r/b (right side kick panel) passenger side j/b ecu A/c ambient temperature sensor (center of front bumper, behind grille) A/c comp relay A/c fuse 5a A/c magnetic clutch & lock sensor (on a/c compressor) A/c triple pressure switch (a/c dual & single pressure switch) (upper left radiator support) Acmg Air bag Air inlet control servo motor (behind right side of dash) Air mix control servo motor (driver side) (behind left center side of dash) Air mix control servo motor (passenger side) (behind right center side of dash) Air vent mode servo motor (behind center of dash) C13 Computer data lines system Cooling fan ecu (in front of engine compt, near cooling fan assembly) Driver side j/b (behind left kick panel) E17 Ec (left side of cylinder head) Ed (rear of left fender) Engine control module (at left side of engine compt, in ecu box) Engine coolant temperature sensor (top right side of engine) Etam Ethw F11 Fan relay Gnd Gnd (vz) Gnd(m) Gnd(s) Hot at all times Hot in acc or on Htr relay Ii (on left side dash brace) Junction connector 1 Junction connector 3 (in engine room 2 r/b) Junction connector 7 (in ecu box) Junction connector 8 (behind left end of dash) Lcki M+(m) M+(s) M-(m) M-(s) Mcool Mhot Mpos 1 Mpos 2 Mpos 6 Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Pre Radio 2 fuse 10a Rfc Tam Thw Vz (gnd)
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Lexus SC 430 2005: 65 (at left front wheel assembly) left front abs speed sensor (at right front wheel assembly) right front abs speed sensor (on left side dash brace) ii (rear of left fender) ed Abs 1 fuse 60a Abs 2 fuse 40a Abs mtr relay Abs sol relay Ast Brake actuator (left rear of engine compartment) Brake fluid level warning switch (in brake fluid reservoir) Driver side j/b (behind left kick panel) Ee (rear of left fender) Eng+ Eng- Engine control module (at left side of engine compt, in ecu box) Engine room 1 j/b (on right side of engine compt, behind strut tower) Engine room 1 r/b (on right side of engine compt, behind strut tower) Engine room 2 r/b (on left side of engine compt, forward of strut tower) Fl+ Fl- Fr+ Fr- Fss Gnd1 Gnd2 Gnd3 Gnd4 Hot at all times Junction connector 8 (behind left end of dash) Lbl lbl Master cylinder pressure sensor (at left rear corner of engine compt) Mr1 Mr2 Mt+ Mt- Mtt Nca Neo Pmc Pnk Pps solenoid (at right front of engine) R1+ R2+ Red Sa1 Sa2 Sa3 Sflh Sflr Sfrh Sfrr Short pin 3 Skid control ecu (behind left end of dash) Sol+ Sol- Srlh Srlr Srrh Srrr Str Trc motor relay Trc+ Trc- Vcm Anti-lock Brakes Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Lexus SC 430 2005: 74 (behind left side of dash) parking brake switch (behind upper center of dash) instrument panel j/b (left side of steering column) ig +bi +bo Abs ind Abs-ig fuse 7.5a Bat Brake ind Center j/b (behind right center of dash) Combination meter Computer data lines system Csw D-ig fuse 10a D/g D20 Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) E10 E14 E16 Engine room 2 r/b (on left side of engine compt, forward of strut tower) Ess Flo Ggnd Gl1 Gl2 Gyaw Headlights system Hot at all times Hot in on or start Hot in run or start Ig+ Ig1 Ig2 Ign fuse 5a Ih (under steering column) Junction connector 13 (behind right side of dash) Junction connector 2 (in engine room 2 r/b) Left rear abs speed sensor (at left rear wheel assembly) Mpx- b2 fuse 7.5a Mpx1 Mpx2 Nca Passenger side j/b (behind right kick panel) Pkb Pnk Red Right rear abs speed sensor (at right rear wheel assembly) Rl+ Rl- Rr+ Rr- Skid control ecu (behind left end of dash) Slip ind Sp1 Ss1 Ss1+ Ss1- Steering sensor (on steering column) Stop fuse 5a Stoplight switch (on top of brake pedal bracket) Stp Trig Vgs Vsc ind Vsc off ind Vsc off switch Vsc warning buzzer (behind left side of dash) Vys Yaw Yaw rate sensor (under rear of center console) Yaw2 Yss
ANTI-THEFT Anti-theft Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Anti-theft Wiring Diagram (1 of 2) for Lexus SC 430 2005: 73 (behind right side of dash) junction connector 13 Bdr Bl (under driver's seat) C16 Computer data lines system Cpse Cpub Cty D-door fuse 25a D17 D18 D19 Dle Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) E17 E18 Engine room 1 r/b (on right side of engine compt, behind strut tower) F11 F17 Gnd H1 h1 Hot at all times Hot in on or acc Hot in on or start I15 I21 Ill Instrument panel j/b (behind upper center of dash) J/c 18 (right rear of luggage compt) Kul L22 L24 Lcm+ Lct Lcte Lcty Left door courtesy switch Left door lock control switch (power window master switch) Left door lock motor, door key lock & unlock switch, & door unlock detection switch (in left front door) Lsw Luggage compartment door detection switch (in luggage compt, near lock assembly) Luggage compartment door lock motor (in luggage compt, near lock assembly) Luggage room j/b (at left rear corner of luggage compt) Luggage room j/b ecu (at left rear corner of luggage compt) Mpx+ Mpx- Mpx-b1 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 Mul P-door fuse 25a P10 P11 Passenger door ecu (in right door) Passenger side j/b (behind right kick panel) Pnk Pwe Pws Radio 2 fuse 10a Red Right door courtesy switch Right door lock control switch Right door lock motor & door unlock detection switch (in right front door) S17 S18 Security fuse 7.5a Sig Sliding roof control ecu (in left rear of luggage compt) Tail fuse 7.5a Wls1 Wlsw Anti-theft Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Anti-theft Wiring Diagram (2 of 2) for Lexus SC 430 2005: 94 (16-19 not used) (25-28 not used) (34-40 not used) (6-12 not used) (at front center of engine compt) engine hood courtesy switch (behind left kick panel) driver side j/b (behind right kick panel) passenger side j/b (left side of dash, behind gauge assembly) transponder key computer (on left side dash brace) ii (under steering column) ih +b1 +b2 Acc Agnd Air bag Ant1 Ant2 B11 B20 Bzr Bzr2 C10 C16 Center j/b (behind right center of dash) Cncl Code Computer data lines system Cpub Cra relay D19 Data Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) Ed (rear of left fender) Efii Efio Engine control module (at left side of engine compt, in ecu box) Engine room 1 r/b (on right side of engine compt, behind strut tower) Engine room 2 r/b (on left side of engine compt, forward of strut tower) Exterior lights system F17 Front controller Gnd Haz Hdcy Head lp relay Headlights system Horn fuse 10a Horn relay Horn-rly Horns system Hot at all times Hot in on or start Hrly Ig2 Ign fuse 5a Ih (under steering column) Ile Imi Imo Ind Interior lights system J10 Junction connector 2 (in engine room 2 r/b) Junction connector 3 (in engine room 2 r/b) Junction connector 9 & 10 (behind top left end of dash) Ksw Main fuse 50a Main luggage compartment door opener switch Mpx- Mpx1 Mpx2 Park/neutral position switch (on transmission) Passenger side j/b (behind right kick panel) Passenger side j/b ecu (right side kick panel) Pnk Rco Rda Red Rssi Rxck Security indicator light Sh- Tail-rly Theft deterrent ecu (behind left end of dash) Theft deterrent horn (at right front of engine compt) Transponder key amplifier (behind dash, right of steering column) Transponder key coil Turn- haz fuse 15a Txct Unlock warning switch (behind left side of dash) Vc12 Wireless door lock buzzer (left rear of engine compt) Wireless door lock control receiver (on center of roof header)
BODY CONTROL MODULES Driver Side J/B ECU Wiring Diagram for Lexus SC 430 2005 List of elements for Driver Side J/B ECU Wiring Diagram for Lexus SC 430 2005: 79 Acc Am1 fuse 5a Anti-lock brakes system Anti-theft system Bklr Bu+ Bu- Cltb Clte Clts Cncl Computer data lines system Dbil Dbkl Driver side j/b (behind left kick panel) Driver side j/b ecu E17 Engine controls system Engine room 1 r/b (on right side of engine compt, behind strut tower) Exterior lights system Fuel Gnd Gnd2 Haz Hdcl Hdcy Hdlo Head Headlights system Hot at all times Hot in run or start Hrly Ig (left side of steering column) Ignition switch Ii (on left side dash brace) Instrument cluster system Interior lights system Junction connector 13 (behind right side of dash) Lock Mirrors system Mpx-b Mpx-b3 fuse 7.5a Mpx-ig Mpx-ig fuse 7.5a Mpx1 Mpx2 Mpx3 Msw Panel fuse 5a Panel1 Panel2 Passenger side j/b (behind right kick panel) Passenger side j/b ecu Passive restraint system Pnk R/e Red Ret Run off 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 Turn-haz fuse 15a Warning system Wiper/washer system Front Controller Wiring Diagram for Lexus SC 430 2005 List of elements for Front Controller Wiring Diagram for Lexus SC 430 2005: 31 Computer data lines system Driver side j/b (behind left kick panel) Ed (rear of left fender) Engine room 1 r/b (on right side of engine compt, behind strut tower) Engine room 2 r/b (on left side of engine compt, forward of strut tower) Exterior lights system Ffog-rly Fhhi(1) Fhhi(2) Fmb3 Fmig Front controller Gnd H-lp upr fuse 20a Headlights system Hlhl Hlhr Horn-rly Horns system Hot at all times Hot in on or start Junction connector 3 (in engine room 2 r/b) Mpx-b3 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Tail-rly Wiper/washer system Wsh-rly Wslv Luggage Room J/B ECU Wiring Diagram for Lexus SC 430 2005 List of elements for Luggage Room J/B ECU Wiring Diagram for Lexus SC 430 2005: 50 Bck1 Bk/up Bubs Computer data lines system Def Defogger system Driver side j/b (behind left kick panel) Engine room 1 r/b (on right side of engine compt, behind strut tower) Exterior lights system F12 F13 Fuel opn fuse 10a Fuel opn(o) Fuel opn(p) Hic Hot at all times Hot in on or start Interior lights system J/c 13 (behind right side of dash) J/c 17 (left rear of luggage compartment) L-o/c(p) L22 L23 L24 Lce1 Lcm+ Lcty Lgcy Luggage room j/b (at left rear corner of luggage compt) Luggage room j/b ecu Mpx+ Mpx- Mpx-b Mpx-b3 fuse 7.5a Mpx-ig Mpx-ig fuse 7.5a P-gnd Passenger side j/b (behind right kick panel) Pnk Red Rr j/b fuse 50a Stop1 Stop2 Stp1 Stp3 Tail 1 Tail 2 Til1 Til2 Trunk, tailgate, fuel doors system Passenger Side J/B ECU Wiring Diagram for Lexus SC 430 2005 List of elements for Passenger Side J/B ECU Wiring Diagram for Lexus SC 430 2005: 49 Acc Air conditioning system Airbag Am1 fuse 5a Back Bkll Computer data lines system Driver side j/b (behind left kick panel) Driver side j/b ecu circuit E17 F11 Fspt Gnd Gnd1 Hdlv Headlights system Hot at all times Hot in on or start Ig (left side of steering column) Ignition switch Ih (under steering column) Ile Instrument panel j/b (behind upper center of dash) Interior lights system Lock Mpx- Mpx-b Mpx-b2 fuse 7.5a Mpx-ig Mpx-ig fuse 7.5a Navigation system Off Passenger side j/b (behind right kick panel) Passenger side j/b ecu (right side kick panel) Passive restraint system Pbil Pwr Red Run S/m S/s Snow Start Transmissions system Warning system Wip Wiper fuse 30a Wiper/washer system Wng
COMPUTER DATA LINES Data Link Connector Wiring Diagram for Lexus SC 430 2005 List of elements for Data Link Connector Wiring Diagram for Lexus SC 430 2005: 32 (left side of steering column) ig (under steering column) ih A21 Air bag sensor assembly (under front of center console) B16 B18 Bat C15 Center j/b (behind right center of dash) Combination meter D/g D20 Data link connector (dlc) 3 (behind left side of dash) Driver side j/b (behind left kick panel) Ec (left side of cylinder head) Engine control module (at left side of engine compt, in ecu box) F16 Gateway ecu (behind right side of dash) Hot at all times J/c 13 (behind right side of dash) J/c 4 & 5 (in ecu box) J/c 7 (in ecu box) J/c 9 & 10 (behind top left end of dash) J10 M5 tc Multi- display Obd fuse 7.5a Sil Skid control ecu (behind left end of dash) Tac Tach Wfse High/Low Bus Wiring Diagram for Lexus SC 430 2005 List of elements for High/Low Bus Wiring Diagram for Lexus SC 430 2005: 91 A/c control assembly (behind center of dash) A10 A21 Acc Air Air bag sensor assembly (under front of center console) Atx+ Atx- Bag Batt Bu+ Bu- Bubs C10 C11 Center j/b (behind right center of dash) Combination meter Combination switch D17 D20 Data link connector (dlc) 3 (behind left side of dash) Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) Driver's power seat ecu (under driver's seat) E10 E16 E17 Engine control module (at left side of engine compt, in in ecu box) Engine room 2 r/b (on left side of engine compt, forward of strut tower) F11 F13 F16 F18 Front passenger's power seat ecu (under driver's seat) Gateway ecu (behind right side of dash) Gnd Gtx+ Gtx- Hot at all times Hot in on or start Hot in on or acc Ig (left side of steering column) Ih (under steering column) Instrument panel j/b (behind upper center of dash) J/c 13 (behind right side of dash) J/c 9 & 10 (behind top left end of dash) J10 L24 Luggage room j/b ecu (at left rear corner of luggage compt) Mpd1 Mpd2 Mpi1 Mpi2 Mpl1 Mpl2 Mpx Mpx+ Mpx- Mpx-b2 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx1 front controller Mpx2 Mpx3 Multi- display P21 P23 Passenger door ecu (in right door) Passenger mpx- Passenger side j/b (behind right kick panel) Pnk Radio & player Radio 2 fuse 10a Red S18 Side j/b ecu Sil Skid control ecu (behind left end of dash) Sliding roof control ecu (in left rear of luggage compt) Theft deterrent ecu (behind left end of dash) Tilt & telescopic ecu (behind left end of dash) Tire pressure monitor receiver (behind center of dash, below radio) Transponder key computer (left side of dash, behind gauge assembly) Tx1 Tx1+ Tx1- Txs+ Txs- W/ navigation Wfse
COOLING FAN Cooling Fan Wiring Diagram for Lexus SC 430 2005 List of elements for Cooling Fan Wiring Diagram for Lexus SC 430 2005: 30 A/c triple pressure switch (a/c dual & single pressure switch (at upper left radiator support) C11 C13 Cooling fan ecu (in front of engine compt, near cooling fan assembly) Driver side j/b (behind left kick panel) Ed (rear of left fender) Engine control module (at left side of engine compt, in ecu box) Engine coolant temperature sensor (on top right side of engine) Engine room 1 r/b (on right side of engine compt, behind strut tower) Engine room 2 r/b (on left side of engine compt, forward of strut tower) Ethw Fan 2 fuse 40a Fan fuse 40a Fan relay Gnd(m) Gnd(s) Heater fuse 10a Hot at all times Hot in on or start Ii (on left side dash brace) Junction connector 1 (in engine room 2 r/b) Junction connector 3 (in engine room 2 r/b) Junction connector 8 (behind left end of dash) M+(m) M+(s) M-(m) M-(s) Pre Rfc Thw
CRUISE CONTROL Cruise Control Wiring Diagram for Lexus SC 430 2005 List of elements for Cruise Control Wiring Diagram for Lexus SC 430 2005: 95 (behind left side of dash) data link connector (dlc) 3 (under center console, near selector lever) shift lock control ecu +b1 +bm Accel pedal position sensor (behind left center of dash) At4 Batt C10 C15 Cancel Ccs Center j/b (behind right center of dash) Combination meter Combination switch Computer data lines system Controlled transmission) (on transmission) Cruise Cruise control switch Cruise ind D-ig fuse 10a Driver side j/b (behind left kick panel) Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) E01 E02 E03 E19 Eb (right side of cylinder head) Ec (left side of cylinder head) Ecc Ed (rear of left fender) Efi fuse 25a Efi relay Eng+ Eng- Engine control module (at left side of engine compartment, in ecu box) Engine room 1 r/b (on right side of engine compartment, behind strut tower) Engine room 2 r/b (on left side of engine compartment, forward of strut tower) Engine room 2 r/b (on left side of engine compt, forward of strut tower) Epa Eptk Eta Etcs fuse 15a F15 Ge01 Hot at all times Hot in on or start Ign fuse 5a Igsw Ih (under steering column) Junction conn- ector 2 (in engine room 2 r/b) Junction connector 2 (in engine room 2 r/b) Junction connector 3 (in engine room 2 r/b) Junction connector 4 (in ecu box) Junction connector 7 (in ecu box) Junction connector 9 (behind top left end of dash) Junction connectors 4 & 5 (in ecu box) j5 Me01 Mpx1 Mpx2 Mrel Neo Nssd Park/ neutral position switch (on transmission) Passenger side j/b (behind right kick panel) Pnk Red Res/ acc Set/ coast Shield Sil Skid control ecu (behind left end of dash) Sp1 Sp2+ Sp2- Speedometer St1- Stop fuse 5a Stop light switch (on top of brake pedal bracket) Stp Stpi Stpo T26 T27 Throttle control motor & sensor (on throttle body) Trc+ Trc- Vcpa Vehicle speed sensor (electronically Vpa Vpa2 Vptk Vta Vta2 Wfse
DEFOGGERS Heated Mirrors Wiring Diagram for Lexus SC 430 2005 List of elements for Heated Mirrors Wiring Diagram for Lexus SC 430 2005: 35 (behind (under driver's seat) bl Bdr Computer data lines system Cpub D-door fuse 25a D17 D19 Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Engine room 1 r/b (on right side of engine compt, behind strut tower) F11 Gnd Hot at all times Hot in on or start Htr+ Htr- I15 Instrument panel j/b (behind upper center of dash) J/c 18 (right rear of luggage compt) Left remote control mirror Luggage room j/b (at left rear corner of luggage compt) Mirror Mirror heater Mpx- b1 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 P-door fuse 25a P11 Passenger door ecu (in right door) Passenger side j/b (behind right kick panel) Right remote control mirror heater Right side of dash) j/c 13 Sig Rear Defogger Wiring Diagram for Lexus SC 430 2005 List of elements for Rear Defogger Wiring Diagram for Lexus SC 430 2005: 28 A/c control assembly (behind center of dash) A10 Acc Bn (at left quarterpanel) Computer data lines system Def Defog fuse 30a Defog relay Dome fuse 7.5a E13 E17 Gnd Hot at all times Hot in acc or on Ih (under steering column) Instrument panel j/b (behind upper center of dash) L24 Luggage room j/b (at left rear corner of luggage compt) Luggage room j/b ecu (at left rear corner of luggage compt) Mpx+ Mpx- Noise filter (rear window defogger) (at left front corner of luggage compt) Passenger side j/b (behind right kick panel) R12 R13 Radio 2 fuse 10a Rear window defogger (in rear window) Red
ELECTRONIC POWER STEERING Electronic Power Steering Wiring Diagram for Lexus SC 430 2005 List of elements for Electronic Power Steering Wiring Diagram for Lexus SC 430 2005: 41 +bi +bo Abs-ig fuse 7.5a Bat Center j/b (behind right center of dash) Combination meter D/g Data link connector (dlc) 3 (behind left side of dash) Driver side j/b (behind left kick panel) E10 E14 E16 Ed (rear of left fender) Ee (rear of left fender) Ess Gnd1 Gnd2 Gnd3 Gnd4 Hot at all times Hot in on or start Ig1 Ih (under steering column) J10 Junction connector 13 (behind right side of dash) Junction connector 9 & 10 (behind top left end of dash) Mpx-b2 fuse 7.5a Mxp1 Passenger side j/b (behind right kick panel) Pnk Pps solenoid (at right front of engine) Red Sil Skid control ecu (behind left end of dash) Sol+ Sol- Sp1 Ss1+ Ss1- Steering sensor (on steering column) Trig
ENGINE PERFORMANCE
4.3L 4.3L, Engine Performance Wiring Diagram (1 of 6) for Lexus SC 430 2005 List of elements for 4.3L, Engine Performance Wiring Diagram (1 of 6) for Lexus SC 430 2005: 73 (behind right side of dash) j/c 13 (left side of dash, behind gauge assembly) transponder key computer (near eng control module) (under steering column) ih +b1 +bm A/c system Accel 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) 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) 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 S6 sli 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 Vcpa Vpa Vpa2 Vptk Wfse Wsfe 4.3L, Engine Performance Wiring Diagram (2 of 6) for Lexus SC 430 2005 List of elements for 4.3L, Engine Performance Wiring Diagram (2 of 6) for Lexus SC 430 2005: 25 (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 Bp (left quarter panel) 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, forward of 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 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 2005 List of elements for 4.3L, Engine Performance Wiring Diagram (3 of 6) for Lexus SC 430 2005: 46 (behind left kick panel) driver side j/b (generator) charging system (in engine room r/b 2) j/c 2 (near eng control module) (on left side of engine compt, forward of 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 (bank2) (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 (bank1) (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 2005 List of elements for 4.3L, Engine Performance Wiring Diagram (4 of 6) for Lexus SC 430 2005: 32 (behind left kick panel) driver side j/b (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 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, forward of 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 2005 List of elements for 4.3L, Engine Performance Wiring Diagram (5 of 6) for Lexus SC 430 2005: 32 (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 2005 List of elements for 4.3L, Engine Performance Wiring Diagram (6 of 6) for Lexus SC 430 2005: 80 (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 Gnd Htr If1l If1r If2l If2r Igf 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 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 position sensor (on throttle body) Thw Vta Vta2 Vvl+ Vvl- Vvr+ Vvr-
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Lexus SC 430 2005 List of elements for Back-up Lamps Wiring Diagram for Lexus SC 430 2005: 49 A/c control assembly (behind center of dash) A10 Air bag sensor assembly (under front of center console) B j4 B j5 Back- up light switch (on transmission) Bck1 Bk/up Bl (under driver's seat) C11 Combination meter Combination switch D-ig fuse 10a Drive side j/b (behind left kick panel) Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) E10 Engine control module (at left side of engine compt, in ecu box) Engine room 1 r/b (on right side of engine compt, behind strut tower) Engine room 2 r/b (on left side of engine compt, forward of strut tower) F13 Front controller Gateway ecu (behind right side of dash) Hot at all times Hot in on or start J/c 17 (left rear of luggage compt) Junction connector 4 & 5 (in ecu box) L22 L24 Left back- up light Luggage room j/b (at left rear corner of luggage compartment) Luggage room j/b ecu Mpi1 Mpi2 Mpl1 Mpl2 Mpx+ Mpx- Mpx1 Mpx2 P-gnd Passenger side j/b (behind right kick panel) Passenger side j/b ecu Red Right back- up light Rr j/b fuse 50a Skid control ecu (behind left end of dash) Tilt & telescopic ecu (behind left end of dash) Tire pressure monitor receiver (behind center of dash, below radio) Exterior Lamps Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Lexus SC 430 2005: 68 (on left side of engine compt, forward of strut tower) engine room 2 r/b (rear of left fender) ed Bl (under driver's seat) Bubs C11 C16 Center j/b (behind right center of dash) Combination switch Computer data lines system Cra relay D10 D20 Driver side j/b (behind left kick panel) Engine room 1 r/b (on right side of engine compt, behind strut tower) Fmb3 Fmig Front controller Gnd High mounted stop light Hot at all times Hot in on or start Ig (left side of steering column) Instrument panel j/b (behind upper center of dash) Junction connector (behind right side of dash) Junction connector 1 (in engine room 2 r/b) Junction connector 14 (behind right side of dash) Junction connector 17 (left rear of luggage compt) Junction connector 3 (in engine room 2 r/b) Junction connector 8 (behind left end of dash) L22 L23 L24 Lce lp fuse 7.5a Lce1 Left front parking light Left rear combination light Left rear side marker light Left stop light License plate light Luggage room j/b (at left rear corner of luggage compartment) Luggage room j/b ecu Mpx+ Mpx- Mpx-b3 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 P-gnd Passenger side j/b (behind right kick panel) Red Right front parking light Right rear combination light Right rear side marker light Right stop light Rr j/b fuse 50a Stop1 Stop2 Stp1 Stp3 Tail fuse 7.5a Tail light Tail-rly Tail1 Tail2 Til1 Til2 Turn signal light Tx1 Exterior Lamps Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Lexus SC 430 2005: 47 (under steering column) ih +ig A/c control assembly (behind center of dash) Bu+ Bu- Center j/b (behind right center of dash) Combination meter Computer data lines system D-ig fuse 10a Driver side j/b (behind left kick panel) Driver side j/b ecu E13 E18 Ed (rear of left fender) Engine room 1 r/b (on right side of engine compt, behind strut tower) F15 Haz Hazard switch Hot at all times Hot in on or start Ig+ Ih (under steering column) Junction connector 12 (behind right side of dash) Junction connector 13 (behind right side of dash) Junction connector 14 (behind right side of dash) Junction connector 3 (in engine room 2 r/b) Left front turn signal light Left turn Left turn ind Mpx+ Mpx+b Mpx- Mpx-b2 fuse 7.5a Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Rear lights ind Red Right front turn signal light Right turn Right turn ind Stop fuse 5a Stop light switch (on top of brake pedal bracket) Stpi Tail ind (canada) Turn signal flasher relay (behind left side of dash, above steering column) Turn- haz fuse 15a
GROUND DISTRIBUTION Ground Distribution Wiring Diagram (1 of 3) for Lexus SC 430 2005 List of elements for Ground Distribution Wiring Diagram (1 of 3) for Lexus SC 430 2005: 74 (if equipped) multi- display (if equipped) seat heater switch A/c control assembly A/c triple pressure switch (a/c single pressure switch) A10 A21 Acc relay Air bag sensor assembly Audio door control switch B10 B11 B20 B21 B22 Brake actuator Brake fluid level warning switch C11 C13 Center j/b (behind right center of dash) Cigarette lighter Combi- nation switch Combination meter D10 D16 D17 D18 D19 D20 Data link connector Driver side j/b (behind left kick panel) Driver side j/b ecu E12 E14 E20 Electronically controlled transmission pattern select switch F j9 F14 F15 F16 F17 F18 Fuel lid opener switch Gateway ecu Glove box light switch H j10 Headlight beam level control ecu Ig (left side of steering column) Ig1 relay Ih (under steering column) Ii (on left side dash brace) Ij (on right side dash brace) Inner mirror J/c j11 (behind center of dash, below radio) J/c j9 & j10 (behind top left end of dash) Left vanity light Luggage compartment door opener main switch Luggage compartment door opener switch Mirror retractor switch, headlight cleaner switch & security indicator light Passenger side j/b (behind right kick panel) Passenger side j/b ecu Personal light, garage door opener Power outlet Radio & player Right vanity light Shift lock control ecu Steering sensor Theft deterrent ecu Tilt & telescopic ecu Tire pressure monitor receiver Tire select switch Trans- ponder key computer Turn signal flasher relay Unlock warning switch & key interlock solenoid Vsc off switch Ground Distribution Wiring Diagram (2 of 3) for Lexus SC 430 2005 List of elements for Ground Distribution Wiring Diagram (2 of 3) for Lexus SC 430 2005: 73 (on left side of engine compt, forward of strut tower) engine room 2 r/b A/c magnetic clutch & lock sensor A/c triple pressure switch (a/c dual pressure switch) Blower motor Brake actuator C10 Combi- nation switch Controller Cooling fan ecu D j4 Data link connector Driver side j/b (behind left kick panel) E j9 E19 E2 (in engine wire harness, near breakout to ground eb) E3 (in engine wire harness, near breakout to fuel injector 5) Ea (rear of right fender) Eb (right side of cylinder head) Ec (left side of cylinder head) Ed (rear of left fender) Ee (rear of left fender) Efi relay Engine control module Engine hood courtesy switch Engine oil level sensor Engine room 1 r/b (on right side of engine compartment, behind strut tower) Exhaust gas sensor Fan relay Front controller Front wiper motor Headlight cleaner control relay Heated oxygen sensor (bank 1 sensor 1) Heated oxygen sensor (bank 1 sensor 2) Heated oxygen sensor (bank 1 sensor 2) shield Heated oxygen sensor (bank 2 sensor 1) Heated oxygen sensor (bank 2 sensor 2) Heated oxygen sensor (bank 2 sensor 2) shield If (at left kick panel) Ig2 relay 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 Ik (at right kick panel) J/c j14 J/c j3 (in engine room 2 r/b) J/c j4 & j5 (in ecu box) J/c j7 (in ecu box) J/c j8 J/c j9 & j10 (behind top left end of dash) J10 Left front fog light Left front parking light Left front side marker light Left front turn signal light Left headlight (high) Left headlight control ecu Park/neutral position switch, a/t indicator light switch & back-up light switch Right front fog light Right front parking light Right front side marker light Right front turn signal light Right headlight (high) Right headlight control ecu Shield e Shield e j5 Skid control ecu Washer level sensor Washer motor Ground Distribution Wiring Diagram (3 of 3) for Lexus SC 430 2005 List of elements for Ground Distribution Wiring Diagram (3 of 3) for Lexus SC 430 2005: 61 (if equipped) navigation amplifier Auto antenna control relay B3 (in body harness, near breakout to telephone computer) Bl (under driver's seat) Bm (under passenger's seat) Bn (at left quarterpanel) Bo (near stereo component amplifier) Bp (at left quarterpanel) Bq (at right quarterpanel) D19 Driver door ecu Fuel lid opener motor Fuel pump High mounted stop light J/c j17 J/c j18 J/c j19 (below left front seat) J/c j20 (below left front seat) J/c j21 (below right front seat) J/c j22 (below right front seat) L24 Left back-up light Left buckle switch Left rear combi- nation light Left rear side marker light Luggage room j/b (at left rear corner of luggage compt) Luggage room j/b ecu Lumbar support control switch (driver's seat) Lumbar support control switch (front passenger's seat) Navigation ecu P11 P21 P22 P23 P24 Passenger door ecu Power seat control switch (driver's seat) Power seat control switch (front passenger's seat) Power seat ecu (driver's seat) Power seat ecu (front passenger's seat) Power seat position sensor (driver's seat front vertical control) Power seat position sensor (driver's seat lifter control) Power seat position sensor (driver's seat reclining control) Power seat position sensor (driver's seat slide control) Power seat position sensor (front passenger's seat front vertical control) Power seat position sensor (front passenger's seat lifter control) Power seat position sensor (front passenger's seat reclining control) Power seat position sensor (front passenger's seat slide control) R13 Rear window defogger Right back-up light Right buckle switch & occupant detection sensor Right rear combi- nation light Right rear side marker light S18 S19 S22 Seat heater controller (driver's seat) Seat heater controller (front passenger's seat) Sliding roof control ecu Stereo component amplifier
HEADLIGHTS Headlamps Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Headlamps Wiring Diagram (1 of 2) for Lexus SC 430 2005: 66 (behind left kick panel) driver side j/b Automatic light control sensor (behind upper right side of dash) Bu+ Bu- Bubs C12 C16 Center j/b (behind right center of dash) Cltb Clte Clts Combination meter Combination switch Computer data lines system D-ig fuse 10a D10 D20 Driver side j/b (behind left kick panel) Driver side j/b ecu E14 E16 F11 F15 Fr fog fuse 15a Front fog ind Gateway ecu (behind right side of dash) Gnd Gnd2 Head Head indicator (except canada) High beam indicator Hot at all times Hot in on or start Hrly Ig (left side of steering column) Ig+ Ih (under steering column) Ii (on left side dash brace) Instrument panel j/b (behind upper center of dash) Junction connector 13 (behind right side of dash) L24 Luggage room j/b ecu (at left rear corner of luggage compartment) Mpd1 Mpd2 Mpi1 Mpi2 Mpl1 Mpl2 Mpx+ Mpx+b Mpx- Mpx-b Mpx-b2 fuse 7.5a Mpx-b3 fuse 7.5a Mpx-ig Mpx-ig fuse 7.5a Mpx1 Mpx2 Parking brake switch (behind left side of dash) Passenger side j/b (behind right kick panel) Pkb Red Skid control ecu (behind left end of dash) Tail fuse 7.5a Tilt & telescopic ecu (behind left end of dash) Tx1 Headlamps Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Headlamps Wiring Diagram (2 of 2) for Lexus SC 430 2005: 36 (on left side of engine compartment, forward of strut tower) engine room 2 r/b (on right side of engine compartment, behind strut tower) engine room 1 r/b Cra relay E10 Ed (rear of left fender) Exterior lights system Ffog-rly Fhhi(1) Fhhi(2) Fmb3 Fmig Front controller Front fog relay Gnd H-lp l lwr fuse 15a H-lp r lwr fuse 15a H-lp upr fuse 20a Head lp relay Hlhl Hlhr Hot at all times Junction connector 14 (behind right side of dash) Junction connector 3 (in engine room 2 r/b) Junction connector 8 (behind left end of dash) Left front fog light Left headlight (high) Left headlight control ecu (behind left headlight) Main fuse 50a Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Red Right front fog light Right headlight (high) Right headlight control ecu (behind right headlight) Tail-rly Headlamps Leveling Wiring Diagram for Lexus SC 430 2005 List of elements for Headlamps Leveling Wiring Diagram for Lexus SC 430 2005: 62 Airbag Beam level indicator C17 Combination meter Computer data lines system D-ig fuse 10a Driver side j/b (behind left kick panel) E16 F15 Flo Front height control sensor (forward of left front strut tower) Gnd H-lp lvl fuse 5a Hdlv Headlight beam level control ecu (behind left end of dash) Hot at all times Hot in on or start Ig (left side of steering column) Ig+ Ih (under steering column) Junction connector 1 (in engine room 2 r/b) Junction connector 13 (behind right side of dash) Left headlight beam level control actuator (behind left headlight) Lh+ Lh- Lh1 Lh2 Lh3 Lh4 Lhe Lhg Lht Mlcom Mpx+ Mpx- Mpx-b2 fuse 7.5a Mpx1 Mpx2 Mrcom Passenger side j/b (behind right kick panel) Passenger side j/b ecu Pnk Rear height control sensor (under left rear of vehicle) Red Rh+ Rh- Rh1 Rh2 Rh3 Rh4 Rhe Rhg Rht Right headlight beam level control actuator (behind right headlight) Sbf Sgf Shfl Shrl Skid control ecu (behind left end of dash) Sp1 Spdl Wng
HORN Horn Wiring Diagram for Lexus SC 430 2005 List of elements for Horn Wiring Diagram for Lexus SC 430 2005: 23 Combination switch Computer data lines system Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) Ed (rear of left fender) Engine room 1 r/b (on right side of engine compt, behind strut tower) Engine room 2 r/b (on left side of engine compt, forward of strut tower) Front controller Gnd Horn fuse 10a Horn relay Horn rly Horn switch Hot at all times Junction connector 3 (in engine room 2 r/b) Left horn (behind grille) Mpx Mpx1 Mpx2 Mpx3 Pnk Right horn (behind grille) Security fuse 7.5a
INSTRUMENT CLUSTER
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Lexus SC 430 2005: 66 A/c control assembly (behind center of dash) A10 Air bag C10 Center j/b (behind right center of dash) D19 D20 Data Dbil Dome fuse 7.5a Door Driver side j/b (behind left kick panel) Driver's side j/b ecu E10 E13 E16 Engine control module (at left side of engine compt, in ecu box) Engine room 2 r/b (on left side of engine compartment, forward of strut tower) Front controller Fspt Gateway ecu (behind right side of dash) Gnd Gnd1 Hot at all times Ig (left side of steering column) Ignition key cylinder light Ih (under steering column) Ile Instrument panel j/b (behind upper center of dash) J/c 13 (behind right side of dash) J/c 18 (right rear of luggage compt) J/c 9 & 10 (behind top left end of dash) J10 Left foot light Left vanity light Map Mpd1 Mpd2 Mpi1 Mpi2 Mpl1 Mpl2 Mpx Mpx+ Mpx- Mpx-b Mpx-b2 fuse 7.5a Mpx-b3 fuse 7.5a Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Passenger side j/b ecu Pbil Personal light Rco Rda Red Right buckle switch (in right front seat belt buckle) Right foot light Right scuff plate light Right vanity light Rssi Theft deterrent ecu (behind left end of dash) Tire pressure monitor receiver (behind center of dash, below radio) Transponder key computer (left side of dash, behind gauge assembly) Wireless door lock control receiver (on center of roof header) Courtesy Lamps Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Lexus SC 430 2005: 61 (in left front seat belt buckle) left buckle switch (under driver's seat) Air bag sensor assembly (under front of center console) Bdr Bl (under driver's seat) Combination meter Combination switch Cty Ctyb Cyl D-door fuse 25a D-ig fuse 10a Door ind Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Engine room 1 r/b (on right side of engine compartment, behind strut tower) F12 F13 F15 F18 Gnd Gnd d19 Hot at all times Hot in on or start Ig+ Ih (under steering column) J/c 13 (behind right side of dash) J/c 17 (left rear of luggage compt) J/c 18 (right rear of luggage compt) J/c 20 (below left front seat) L22 L24 Left door courtesy light Left door courtesy switch Left luggage compartment light Left scuff plate light Lgcy Luggage room j/b (at left rear corner of of luggage compartment) Luggage room j/b ecu Mpx+ Mpx+b Mpx- Mpx-b Mpx1 Mpx2 Mpx2 d17 P-door fuse 25a P-gnd P11 Passenger door ecu (in right door) Passenger side j/b (behind right kick panel) Pnk Power seat ecu (driver's seat) Power seat ecu (front passenger's seat) (under front passenger's seat) Red Right door courtesy light Right door courtesy switch Right luggage compartment light Skid control ecu (behind left end of dash) Sliding roof control ecu (in left rear of luggage compt) Tilt & telescopic ecu (behind left end of dash) Instrument Illumination Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Lexus SC 430 2005: 71 A/c control assembly (behind center of dash) A/t shift lever illumination A10 Audio door control switch B j9 B19 Bu+ Bu- Center j/b (behind right center of dash) Cigarette lighter Combination switch D j10 D10 D18 D20 Driver side j/b (behind left kick panel) Driver side j/b ecu E10 E15 Electronically controlled transmission pattern select switch Engine control module (at left side of engine compt, in ecu box) Engine room 2 r/b (on left side of engine compartment, forward of strut) F10 F11 Front controller Gateway ecu (behind right side of dash) Gnd Gnd2 Hot at all times Hot in on or start Ig (left side of steering column) Ih (under steering column) Ii (on left side dash brace) Instrument panel j/b (behind upper center of dash) J/c 13 (behind right side of dash) J/c 9 & 10 (behind top left end of dash) Mpd1 Mpd2 Mpi1 Mpi2 Mpl1 Mpl2 Mpx+ a10 Mpx- a9 Mpx-b3 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 Multi- display (w/ navi- gation) Panel fuse 5a Panel1 Panel2 Passenger side j/b (behind right kick panel) Pnk Radio & player Red Remote control mirror switch Rheostat Seat heater switch (if equipped) Sw1 Sw2 Sw3 Tilt & telescopic ecu (behind left end of dash) Tire pressure monitor receiver (behind center of dash, below radio) Tr+ Tr1 Tr2 Tr3 Transponder key computer (left side of dash, behind gauge assembly) Tx1 Vsc off switch Instrument Illumination Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Lexus SC 430 2005: 59 Air bag Air bag sensor assembly (under front of center console) Bdr Bl (under driver's seat) Bubs Combination meter D-door fuse 25a D-ig fuse 10a Dle Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) E14 E16 Engine room 1 r/b (on right side of engine compartment, behind strut tower) F13 F15 F18 Glove box light Glove box light switch Gnd Gnd d19 Hot at all times Hot in on or start Ig (left side of steering column) Ig+ Ih (under steering column) J/c 13 (behind right side of dash) J/c 17 (left rear of luggage compt) J/c 18 (right rear of luggage compt) L24 Luggage room j/b (at left rear corner of luggage compartment) Luggage room j/b ecu Mpx Mpx+ Mpx+b Mpx- Mpx-b2 fuse 7.5a Mpx1 Mpx1 d17 Mpx2 P-door fuse 25a P-gnd P11 Passenger door ecu (in right door) Passenger side j/b (behind right kick panel) Passenger side j/b ecu Pnk Power seat ecu (driver's seat) (under driver's seat) Power seat ecu (front passenger's seat) (under front passenger's seat) Power window master switch Pwe Pws Red Right door lock control switch Right power window control switch Skid control ecu (behind left end of dash) Sliding roof control ecu (in left rear of luggage compt) Theft deterrent ecu (behind left end of dash) Wls1
MEMORY SYSTEMS Memory Systems Wiring Diagram (1 of 3) for Lexus SC 430 2005 List of elements for Memory Systems Wiring Diagram (1 of 3) for Lexus SC 430 2005: 79 (if equipped) mirror retractor switch (under a2 Bdr Computer data lines system Cpub D-door fuse 25a D-ig fuse 10a D17 D18 D19 De2 Defogger system Dm+r Dmhr Dmvr Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Driver side j/b ecu Driving position memory switch (driver's seat) Dvc Engine control module (at left side of engine compt, in ecu box) Engine room 1 r/b (on right side of engine compt, behind strut tower) F11 Gnd Hot at all times Hot in on or start Hssr I15 I17 I19 I22 Ii (on left side dash brace) Ill+ Ill- Instrument panel j/b (behind upper center of dash) Interior lights system J/c 13 (behind right side of dash) J/c 18 (right rear of luggage compt) J/c 4 & 5 (in ecu box) J5 b Left remote control mirror Lt/rt m Luggage room j/b (left rear corner of luggage compt) Mirrors system Mpx-b Mpx-b1 fuse 7.5a Mpx-b3 fuse 7.5a Mpx-ig Mpx-ig fuse 7.5a Mpx1 Mpx2 Mr+ Mr- Mry Msw Mswe P-door fuse 25a P11 Park/neutral position switch (on transmission) Passenger door ecu (in right door) Passenger side j/b (behind right kick panel) Pe2 Pm+r Pmhr Pmvr Pnk Pvc R/e Red Remote control mirror switch Ret Retrac m Right remote control mirror Seat) bl Sensor Sig Up/dn m Vssr W/mirror retractor Memory Systems Wiring Diagram (2 of 3) for Lexus SC 430 2005 List of elements for Memory Systems Wiring Diagram (2 of 3) for Lexus SC 430 2005: 64 (under driver's seat) driver's seat reclining motor (under driver's seat) driver's seat slide motor Bl (under driver's seat) Center j/b (behind right center of dash) Computer data lines system D p/seat fuse 30a Driver side j/b (behind left kick panel) Driver's power seat control switch Driver's power seat ecu (under driver's seat) Driver's seat front vertical control sensor (under driver's seat) Driver's seat front vertical motor (under driver's seat) Driver's seat lifter control sensor (under driver's seat) Driver's seat lifter motor (under driver's seat) Driver's seat lumbar support control motor (in driver's seat back) Driver's seat lumbar support control switch Driver's seat reclining control sensor (under driver's seat) Driver's seat slide control sensor (under driver's seat) Ecub Ecue Fdwn Frv+ Frv- Fup G10 Gnd Hot at all times Ih (under steering column) Ii (on left side dash brace) J/c 19 (below left front seat) J/c 20 (below left front seat) J10 Ksw Ldwn Lft+ Lft- Lup Mpx1 Mpx2 P21 P22 Pvcc Rcl+ Rcl- Rclf Rclr Red Sgnd Sld+ Sld- Sldf Sldr Ssfv Ssrr Ssrs Ssrv Sysb Tem+ Tem- Ti & te fuse 15a Tilt & telescopic ecu (behind left end of dash) Tim+ Tim- Transponder key computer (left side of dash, behind gauge assembly) Unlock warning switch (behind left side of dash) Memory Systems Wiring Diagram (3 of 3) for Lexus SC 430 2005 List of elements for Memory Systems Wiring Diagram (3 of 3) for Lexus SC 430 2005: 48 Bm (under passenger's seat) Computer data lines system Fdwn Front passenger's power seat control switch Front passenger's seat front vertical control sensor (under right front seat) Front passenger's seat front vertical motor (under right front seat) Front passenger's seat lifter control sensor (under right front seat) Front passenger's seat lifter motor (under right front seat) Front passenger's seat lumbar support control motor (in front passenger's seat back) Front passenger's seat lumbar support control switch Front passenger's seat reclining control sensor (under right front seat) Front passenger's seat reclining motor (under right front seat) Front passenger's seat slide control sensor (under right front seat) Front passenger's seat slide motor (under right front seat) Frv+ Frv- Fup Gnd Hot at all times J/c 21 (below right front seat) J/c 22 (below right front seat) Ldwn Lft+ Lft- Lup Mpx1 Mpx2 P p/seat fuse 30a P23 P24 Passenger side j/b (behind right kick panel) Passenger's power seat ecu (under driver's seat) Pvcc Rcl+ Rcl- Rclf Rclr Red Sgnd Sld+ Sld- Sldf Sldr Ssfv Ssrr Ssrs Ssrv Sysb
NAVIGATION Navigation Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Navigation Wiring Diagram (1 of 2) for Lexus SC 430 2005: 72 (in body harness, near breakout to rear woofer) (under steering column) ih Acc Aui+ Aui- Auo+ Auo- B13 B18 Bo (near stereo component amplifier) Center j/b (behind right center of dash) Computer data lines system D11 D18 D20 Data link connector (dlc) 3 (behind left side of dash) E10 E11 E17 Engine room 1 r/b (on right side of engine compt, behind strut tower) G10 Gnd Gnd1 Hot at all times Hot in on or acc Hot in on or start Ig (left side of steering column) Instrument cluster system Instrument panel j/b (behind upper center of dash) J/c 12 (behind right side of dash) J/c 15 (above right rear wheel) J/c 18 (right rear of luggage compartment) J/c 9 & 10 (behind top left end of dash) J10 Left door speaker (squawker & tweeter) Mic+ Mic- Mtx+ Mtx- Mut2 N-mu Nav+ Nav- Navi Navigation amplifier (at right rear corner of luggage compartment) Navigation ecu (at right rear corner of luggage compt) Navo Nca P-ig fuse 10a Passenger side j/b (behind right kick panel) Passenger side j/b ecu Pnk Radio 1 fuse 30a Radio 2 fuse 10a Red Rev S23 Snse Sp+ Sp- Spd Stereo component amplifier (at right rear corner of luggage compt) Sync Tdx+ Tdx- Tfl+ Tfl- Tv fuse 5a Tx+ Tx- Voi+ Voi- Navigation Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Navigation Wiring Diagram (2 of 2) for Lexus SC 430 2005: 39 +b1 Acc Air conditioning system Atx+ Atx- Close Computer data lines system Driver side j/b (behind left kick panel) E16 Engine room 2 r/b (on left side of engine compartment, forward of strut tower) Gnd1 Hot in start Ivo+ Ivo- Mco+ Mco- Multi-display Navigation door & tilt control Nca Open Open/ close Parking brake switch (behind left side of dash) Pkb Pnk Radio & player Red Sgnd Sld Spd St1 Starter fuse 7.5a Sync Tilt Tx+ Tx- Tx1+ Tx1- Txs+ Txs-
PASSIVE RESTRAINTS Passive Restraints Wiring Diagram for Lexus SC 430 2005 List of elements for Passive Restraints Wiring Diagram for Lexus SC 430 2005: 23 A21 A22 Air bag Air bag sensor assembly (at center of dash, below radio) Bkll Bklr Bl (under driver's seat) D-ig fuse 10a Dbkl Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) E11 Hot in on or start J/c 18 (right rear of luggage compt) J/c 20 (below left front seat) Left buckle switch (in left front seat belt buckle) Left tension reducer solenoid (at base of left "b" pillar) Mpx2 Passenger side j/b (right side kick panel) Passenger side j/b ecu Rbe+ Right buckle switch (in right front seat belt buckle) Right tension reducer solenoid (at base of right "b" pillar)
POWER ANTENNA Power Antenna Wiring Diagram for Lexus SC 430 2005 List of elements for Power Antenna Wiring Diagram for Lexus SC 430 2005: 21 Anta Auto antenna control relay (at right side of luggage compt) Center j/b (behind right center of dash) E13 E17 Engine room 1 r/b (on right side of engine compt, behind strut tower) Hot at all times Hot in acc or on Hot in on or start Instrument panel j/b (behind upper center of dash) J/c 12 (behind right side of dash) J/c 15 (above right rear wheel) J/c 18 (right rear of luggage compt) J/c 9 (behind top left end of dash) P-ig fuse 10a Passenger side j/b (behind right kick panel) R1 antb R3 ant Radio & player Radio 1 fuse 30a Radio 2 fuse 10a
POWER DISTRIBUTION Power Distribution Wiring Diagram (1 of 3) for Lexus SC 430 2005 List of elements for Power Distribution Wiring Diagram (1 of 3) for Lexus SC 430 2005: 64 (rear of right fender) ea Abs 1 fuse 60a Abs 2 fuse 40a Acc Air conditioning system Alt fuse 140a Alt-s fuse 5a Am1 fuse 5a Am2 fuse 30a Anti-lock brakes system Battery C13 Cooling fans system Cruise control, engine controls & transmissions systems Cruise control, transmissions, engine controls, anti-theft & anti-lock brakes systems D-door fuse 25a D/c cut fuse 15a Driver side j/b (behind left kick panel) E17 Efi fuse 25a Efi relay Engine controls system Engine room 1 r/b (on right side of engine compartment, behind strut tower) Engine room 2 r/b (on left side of engine compartment, forward of strut tower) Etcs fuse 15a Exterior lights, door locks, anti-theft & body computer systems Fan 2 fuse 40a Fan fuse 40a From ignition switch (diagram 1 of 3) H-lp upr fuse 20a Headlamp relay Headlights & body computer systems Heater fuse 50a Horn fuse 10a Horns, door locks, anti-theft & body computer systems Ig2 fuse 7.5a Ig2 main fuse 20a Ig2 relay Ign fuse 5a Ignition switch Inj fuse 10a Interior lights, defogger, power windows, mirrors power tops, door locks & anti-theft systems Lock Main fuse 50a Navigation, sound & power antenna systems Off P-door fuse 25a Passenger side j/b (behind right kick panel) Pnk Radio 1 fuse 30a Short pin 1 Short pin 2 Start Starter fuse 7.5a Starter relay Starting/ charging system Starting/charging & engine controls systems To driver side j/b (diagram 3 of 3) To engine room 2 r/b (diagram 1 of 3) To passenger side j/b (diagram 2 of 3) To rr j/b fuse (diagram 2 of 3) To tail fuse (diagram 3 of 3) Transmissions, engine controls, starting/charging & navigation systems Turn-haz fuse 15a Power Distribution Wiring Diagram (2 of 3) for Lexus SC 430 2005 List of elements for Power Distribution Wiring Diagram (2 of 3) for Lexus SC 430 2005: 71 (not used) A/c fuse 5a Acc relay Accy Air conditioning & instrument cluster systems Air conditioning, instrument cluster, body computer, navigation, power antenna, sound, door locks, anti-theft, power windows, defogger, shift interlock & warning systems Body computer & exterior lights systems C10 C12 C17 Cig fuse 15a Cigarette lighter Defog fuse 30a Defog relay Defogger system Dome fuse 7.5a E13 E16 E17 Engine controls, mirrors, seats, power windows, power tops, door locks, anti-theft & body computer systems Engine room 1 r/b (on right side of engine compartment, behind strut tower) F11 From driver side j/b h (diagram 3 of 3) From engine f room 1 r/b (diagram 1 of 3) From engine room 1 r/b (diagram 1 of 3) From ignition switch (diagram 1 of 3) Fuel opn fuse 10a G10 Garage door opener, body computer, sound, defogger, anti-theft, door locks & interior lights systems Gnd H-lp cln fuse 30a H-lp lvl fuse 5a Headlights system Headlights, exterior lights, wiper/washer & body computer systems Headlights, interior lights, body computer, mirrors, exterior lights, wiper/washer, memory & trunk, tailgate, fuel doors systems I10 I19 I21 Ig (left side of steering column) Ig1 relay Ii (on left side dash brace) J/c 11 (behind center of dash, below radio) Lce-lp fuse 7.5a Lgg left fuse 20a Lgg right fuse 20a Luggage room j/b (at left rear corner of luggage compartment) Luggage room j/b ecu Mpx-b1 fuse 7.5a Mpx-b2 fuse 7.5a Mpx-b3 fuse 7.5a Navigation system P p/seat fuse 30a P-ig fuse 10a P-tray fuse 20a Passenger side j/b (behind right kick panel) Passenger side j/b ecu Pnk Power tops system Radio 2 fuse 10a Red Roof left fuse 20a Roof right fuse 20a Rr j/b fuse 50a Seat htr fuse 20a Seats system Sound, navigation, seats, shift interlock, mirrors & power antenna systems To driver side j/b (diagram 3 of 3) Tv fuse 5a Washer fuse 20a Wiper/ washer system Wiper/washer system Power Distribution Wiring Diagram (3 of 3) for Lexus SC 430 2005 List of elements for Power Distribution Wiring Diagram (3 of 3) for Lexus SC 430 2005: 64 (not used) Abs-ig fuse 7.5a Acc relay Accy Air conditioning & cooling fans systems Air conditioning system Air conditioning, headlights, interior lights, mirrors, body computer, memory, power tops, exterior lights, anti-theft, door locks, wiper/washer & power windows systems Anti-lock brakes system Body computer & wiper/washer systems Body computer system Body computer, door locks, power windows & anti-theft systems C11 C16 Computer data lines & engine controls systems Cruise control, engine controls, transmissions, body computer, shift interlock, exterior lights & anti-lock brakes systems D p/seat fuse 30a D-ig fuse 10a Driver side j/b (behind left kick panel) Driver side j/b ecu E10 E11 Exterior lights, starting/charging, cruise control, mirrors, wiper/washer, power tops & transmissions systems F11 F12 F15 F16 F17 Fr fog fuse 15a From fuse am1 (diagram 1 of 1) From ignition switch (diagram 1 of 3) From passenger side j/b (diagram 2 of 3) G10 Gnd Headlights & body computer systems Headlights, exterior lights, door locks, anti-theft & body computer systems Heater fuse 10a Horns & body computer systems I15 I16 I17 Ig1 relay Ii (on left side dash brace) J10 Memory & seats systems Memory systems Mpx-ig Mpx-ig fuse 7.5a Obd fuse 7.5a Panel fuse 5a Panel1 Passive restraints & body computer systems Passive restraints system Pnk Power outlet Power windows, power tops, mirrors, defogger, body computer, anti-theft & door locks systems Pwr outlet fuse 15a Red Security fuse 7.5a Stop fuse 5a Tail fuse 7.5a Ti & te fuse 15a To passenger side j/b (diagram 2 of 3) Wiper fuse 30a Wiper/washer & body computer systems
POWER MIRRORS Electrochromic Mirror Wiring Diagram for Lexus SC 430 2005 List of elements for Electrochromic Mirror Wiring Diagram for Lexus SC 430 2005: 29 Center j/b (behind right center of dash) D19 D20 Data Door locks system Driver door ecu (in driver's door) Ec mirror Ec+ Ec- Eci+ Eci- F14 F16 Gnd Hot in on or start I12 Ig (left side of steering column) Ih (under steering column) Inner mirror J10 Junction connector 9 & 10 (behind top left end of dash) Left remote control mirror P-ig fuse 10a P11 Passenger door ecu (in right door) Passenger side j/b (behind right kick panel) Red Right remote control mirror Rssi
POWER SEATS Heated Seats Wiring Diagram for Lexus SC 430 2005 List of elements for Heated Seats Wiring Diagram for Lexus SC 430 2005: 26 B14 Bl (under driver's seat) Bm (under passenger's seat) Center j/b (behind right center of dash) D20 Driver's seat heater controller (under driver's seat) Front passenger's seat heater controller (under passenger's seat) Hot at all times Hot in on or start Ig (left side of steering column) Ih (under steering column) Ill Interior lights system J/c 20 (below left front seat) J/c 21 (below right front seat) P p/seat fuse 30a P-ig fuse 10a Passenger side j/b (behind right kick panel) Rvl Rvr Seat heater switch Seat htr fuse 20a Swl Swr Thl Thr
POWER TOP/SUNROOF Power Top/Sunroof Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Power Top/Sunroof Wiring Diagram (1 of 2) for Lexus SC 430 2005: 81 Blgl Blgr Bpt Brfl Brfr C10 red Cls Computer data lines system Cpub Hot at all times J/c 17 (left rear of luggage compartment) L22 L24 Lct Lcte Lcty Left quarter power window motor (front of left quarter panel) Lfl+ Lfl- Lfr+ Lfr- Lgg lh fuse 20a Lgg rh fuse 20a Limit switch (left luggage front lock) (at left rear side of luggage compt) Limit switch (package tray 1) (near left side of package tray) Limit switch (roof close, left) (at left side of roof) Limit switch (roof close, right) (at right side of roof) Limit switch (roof lock) (at left side of roof) Limit switch (roof position 1 & 2) (in front of left rear wheel) Limit switch (tonneau cover) (front of luggage compartment) Lll Llle Lml+ Lml- Lpl Lplb Lple Luggage compartment door closer motor (left) (at left side of luggage compt) Luggage compartment door closer motor (right) (at right side of luggage compt) Luggage compartment door detection switch (in luggage compt, near lock assembly) Luggage room j/b (at left rear corner of luggage compt) Luggage room j/b ecu (at left rear corner of luggage compt) Mpx+ Mpx- Open P-tray fuse 20a Package tray motor (below center of package tray) Pnk Ptm+ Ptm- Ptp1 Ptp2 Ptpe Qwl+ Qwl- Rcl Rcle Rcr Rcre Red Rhl Rhle Rll Rlle Rlm+ Rlm- Rml+ Rml- Roof lh fuse 20a Roof lock motor (at front of roof) Roof rh fuse 20a Rpl Rplb Rple S17 S19 S21 Sliding roof control ecu (in left rear of luggage compt) Swe Tcs Tcse Power Top/Sunroof Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Power Top/Sunroof Wiring Diagram (2 of 2) for Lexus SC 430 2005: 63 (above right rear wheel) (package tray 2) limit switch (above right rear wheel) (roof position 3) limit switch (at right rear side of luggage compt) (right luggage front lock) limit switch (luggage compartment door open & close) limit switch (rear center of vehicle) (roof open) limit switch A/c control assembly (behind center of dash) A10 Bm (under passenger's seat) Cls Computer data lines system Driver side j/b (behind left kick panel) Gnd Hot at all times Hot in on or start I20 Ign Ih (under steering column) Instrument panel j/b (behind upper center of dash) J/c 13 (behind right side of dash) J/c 18 (right rear of luggage compartment) Lcr Lcre Left luggage compartment door drive motor (at left side of luggage compt) Left roof drive motor (below left "c" pillar) Llr Llre Lmr+ Lmr- Lor Lpr Lprb Lpre Mpx+ Mpx- Mpx-b1 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 Open Passenger side j/b (behind right kick panel) Pnk Qwr+ Qwr- Red Rhr1 Rhr2 Rhre Right luggage compartment door drive motor (at right side of luggage compt) Right quarter power window motor (front of right quarter panel) Right roof drive motor (below right "c" pillar) Rmr+ Rmr- Ror Rore Rpr Rprb Rpre S18 S20 Sgnd Sig Sliding roof control ecu (in left rear of luggage compt) Swe
POWER WINDOWS Power Windows Wiring Diagram for Lexus SC 430 2005 List of elements for Power Windows Wiring Diagram for Lexus SC 430 2005: 88 (behind left kick panel) driver side j/b (behind upper center of dash) instrument panel j/b (under steering column) +b1 +b2 Acc Auto Bdr Bl (under driver's seat) Bzr Bzr2 Center j/b (behind right center of dash) Computer data lines system Cpse Cpub Cty D-door fuse 25a D17 D18 D19 Data Ddn Dn auto Dn man Driver door ecu (in driver's door) Dt1 Dup E17 E18 Engine room 1 r/b (on right side of engine compt, behind strut tower) F11 F17 Gnd Hot at all times Hot in on or acc Hot in on or start I15 I21 J10 J9 f Junction connector 13 (behind right side of dash) Junction connector 18 (right rear of luggage compartment) Junction connector 9 & 10 (behind top left end of dash) Kul Left door courtesy switch Left door lock motor, door key lock & unlock switch & door lock detection switch (in left front door) Left power window motor (in left door) Lmt Luggage room j/b (at left rear corner of luggage compartment) Mdn Mpx Mpx-b1 fuse 7.5a Mpx-ig fuse 7.5a Mpx1 Mpx2 Mul Mup P-door fuse 25a P11 Passenger door ecu (in right door) Passenger side j/b (behind right kick panel) Pct Pls Power window master switch Pwe Pws Radio 2 fuse 10a Rco Rda Red Right door courtesy switch Right power window control switch Right power window motor (in right door) Rssi Sc1 Sc2 Sc3 Security fuse 7.5a Sgnd Sig Theft deterrent ecu (behind left end of dash) Up auto Up man W/l Wireless door lock buzzer (left rear of engine compt) Wireless door lock control receiver (on center of roof header) Wls1 Wlsw
RADIO Radio Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Radio Wiring Diagram (1 of 2) for Lexus SC 430 2005: 62 (behind top left end of dash) j/c 9 & 10 (under steering column) ih Acc Atx+ Atx- Audio door control switch Auo+ Auo- B13 Center j/b (behind right center of dash) Combination meter D-ig fuse 10a D20 Dome fuse 7.5a Dos1 Driver side j/b (behind left kick panel) E10 E13 E16 E17 Engine room 1 r/b (on right side of engine compt, behind strut tower) F14 F15 Gateway ecu (behind right side of dash) Gnd Gtx+ Gtx- Hot at all times Hot in acc or on Hot in on or start Ig (left side of steering column) Ig+ Ih (under steering column) Ij (on right side dash brace) Ill Instrument panel j/b (behind upper center of dash) Interior lights system J/c 12 (behind right side of dash) J/c 13 (behind right side of dash) J10 Mpx+b Mpx-b2 fuse 7.5a Multi- display Multi-display Mut2 Mute Navigation ecu (if equipped) (at right rear corner of luggage compartment) Nca Passenger side j/b (behind right kick panel) Pnk Radio & player Radio 1 fuse 30a Radio 2 fuse 10a Red Sgnd Tx+ Tx- Tx1+ Tx1- Txs+ Txs- W/ navigation Radio Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Radio Wiring Diagram (2 of 2) for Lexus SC 430 2005: 49 (above right rear wheel) j/c 15 +b sp- Acc Aui+ Aui- Bo (near stereo component amplifier) Fl+ Fl- Fr+ Fr- Gnd Left door speaker (squawker & tweeter) Left front woofer Left rear speaker Mtx+ Mtx- Mute N-mu Nav+ Nav- Navi Navigation amplifier (if equipped) (at right rear corner of luggage compt) Navo Pnk Rear woofer Red Right door speaker (squawker & tweeter) Right front woofer Right rear speaker Rl+ Rl- Rr+ Rr- S22 S23 S28 Sp+ Spd Stereo component amplifier (at right rear corner of luggage compt) Tdx+ Tdx- Tfl+ Tfl- Tfr+ Tfr- W/ navigation W/o navigation Wf+ Wf-
SHIFT INTERLOCK Shift Interlock Wiring Diagram for Lexus SC 430 2005 List of elements for Shift Interlock Wiring Diagram for Lexus SC 430 2005: 25 (behind left side of dash) key interlock solenoid Acc B10 Center j/b (behind right center of dash) D16 D20 Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) E17 F10 Hot at all times Hot in acc or on Hot in on or start Ig (left side of steering column) Ih (under steering column) Instrument panel j/b (behind upper center of dash) Kls+ P-ig fuse 10a Passenger side j/b (behind right kick panel) Radio 2 fuse 10a Shift lock control ecu (under center console, near selector lever) Stop fuse 5a Stoplight switch (on top of brake pedal bracket) Stp Stpi
STARTING/CHARGING Charging Wiring Diagram for Lexus SC 430 2005 List of elements for Charging Wiring Diagram for Lexus SC 430 2005: 23 Alt fuse 140a Alt-s fuse 5a Battery Battery ground Charge indicator Combination meter Computer data lines system D-ig fuse 10a Driver side j/b (behind left kick panel) Engine control module (at left side of engine compartment, in ecu box) Engine room 1 r/b (on right side of engine compartment, behind strut tower) F15 Generator Hot in on or start Ig+ Ih (under steering column) Junction connector 4 & 5 (in ecu box) Mpx+ Mpx1 Mpx2 Nca Passenger side j/b (behind right kick panel) Red Starting Wiring Diagram for Lexus SC 430 2005 List of elements for Starting Wiring Diagram for Lexus SC 430 2005: 23 Acc Am2 Am2 fuse 30a Battery Battery ground Ed (rear of left fender) Engine control module (at left side of engine compartment, in ecu box) Engine room 1 r/b (on right side of engine compartment, behind strut tower) Engine room 2 r/b (on left side of engine compartment, forward of strut tower) Ignition switch Junction connector 3 (in engine room 2 r/b) Lock Nca Off Park/neutral position switch (on transmission) Short pin 1 Short pin 2 St2 Sta Start Starter Starter fuse 7.5a Starter relay
SUPPLEMENTAL RESTRAINTS Supplemental Restraints Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Lexus SC 430 2005: 55 (at base of left "b" pillar) left pretensioner (in left door) left door side air bag sensor (left side of driver's seat) left side air bag squib +sl +sr -sl -sr A20 A21 A22 Air bag sensor assembly (at center of dash, below radio) Air bag squib (steering wheel pad) (center of steering wheel) Dml+ Dml- Dmr+ Dmr- Driver side j/b (behind left kick panel) Esl Esr Fsr+ Fsr- Hot in on or start Ig1 Ig2 Ig2 fuse 7.5a J/c 18 (right rear of luggage compt) Mpx-ig fuse 7.5a Mpx1 Mpx2 P2+ P2- Passenger side j/b (behind right kick panel) Pl+ Pl- Pnk Pr+ Pr- Rbe+ Right buckle switch (in right front seat belt buckle) occupant detection sensor (below right front seat) Right door side air bag sensor (in right door) Right pretensioner (at base of right "b" pillar) Right side air bag sensor (behind interior trim, forward of rear wheel) Right side air bag squib (right side of passenger's seat) Sfl+ Sfl- Sfr+ Sfr- Sil Spiral cable Ssl+ Ssl- Ssr+ Ssr- Vupl Vupr Supplemental Restraints Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Lexus SC 430 2005: 47 (on left side dash brace) ii (under steering column) ih A/c control assembly (behind center of dash) A10 Air bag Air bag squib (front passenger air bag assembly) (right side of dash) Bl (under driver's seat) Combination meter D-ig fuse 10a Data link connector (dlc) 3 (behind left side of dash) Dbkl Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) E10 Engine control module (at left side of engine compt, in ecu box) Engine room 2 r/b (on left side of engine compt, forward of strut tower) Esl F13 F15 Front controller Gateway ecu (behind right side of dash) Hot in on or start J/c 20 (below left front seat) J/c 9 (behind top left end of dash) Left buckle switch (in left front seat belt buckle) Left front air bag sensor (at left front of engine compt) Left side air bag sensor (behind interior trim, forward of rear wheel) Mpi1 Mpi2 Mpl2 Mpx + Mpx - Mpx 1 Mpx 2 Mpx- Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Passenger side j/b ecu Right front air bag sensor (at right front of engine compt) Skid control ecu (behind left end of dash) Solid state Srs ind Ssl+ Ssl- Tire pressure monitor receiver (behind center of dash, below radio) Vupl
TRANSMISSION A/T Wiring Diagram (1 of 2) for Lexus SC 430 2005 List of elements for A/T Wiring Diagram (1 of 2) for Lexus SC 430 2005: 68 (in eng compt main harn, near center of left fender) (near eng control module) e5 +b1 +bm Accelerator position sensor (behind left center of dash) B16 Batt C12 C15 Center j/b (behind right center of dash) Combination meter Computer data lines system D-ig fuse 10a D17 Data link connector 3 (below left side of dash) Driver side j/b (behind left kick panel) Driver side j/b ecu (left end of dash) Ect pwr Ect snow Ed (left front fender) Efi fuse 25a Efi relay Electronically controlled transmission pattern select switch Engine control module (ecm) (at left side of engine compt, in ecu box) Engine controls system Engine room r/b 1 (right side compt, behind of engine strut tower) Engine room r/b 2 (left side of engine compt, forward of strut tower) Epa Eptk Etcs fuse 15a F15 Hot at all times Hot in on or start Ig+ Ign fuse 5a Igsw Ih (under steering column) J/c 13 (behind right side of dash) J/c 2 (in engine room r/b 2) J/c 3 (in engine room r/b 2) J/c 4, j/c 5 (in ecu box) j5 J/c 9 (behind top left end of dash) Mil Mpx1 Mpx2 Mrel P4 snow P6 mpx- Passenger side j/b (behind right kick panel) Passenger side j/b ecu (right side kick panel) Pwr Red Sil Snow Speedo Stop fuse 5a Stoplight switch (top of brake pedal bracket) Stp Stpi Stpo Tac Tach Vcpa Vpa Vpa2 Vptk Wfse Wsfe A/T Wiring Diagram (2 of 2) for Lexus SC 430 2005 List of elements for A/T Wiring Diagram (2 of 2) for Lexus SC 430 2005: 44 (behind right kick panel) passenger side j/b (on transaxle) electronically controlled transmission solenoid (on transmission) (integral to park/neutral position switch) a/t indicator light switch At4 Atl Braided C10 C16 E01 E02 E03 Eb (side of right cylinder head) Ec (side of left cylinder head) Engine control module (ecm) (at left side of engine compt, in ecu box) Engine coolant temperature sensor (on top right side of engine) Eoil Eta Ethw Ge01 J/c 7 (in ecu box) Me01 Nca Nco+ Nco- Nssd Nssl O/d direct clutch speed sensor (on trans) Oil Red Shift lock control ecu (under center console, near selector) Sln+ Sln- Slt+ Slt- Slu+ Slu- Sp2+ Sp2- Throttle control motor (on throttle body) Throttle position sensor (on throttle body) Thw Vehicle speed sensor (electronically controlled transmission) (on trans) Vta Vta2
TRUNK, TAILGATE, FUEL DOOR Fuel Door Release Wiring Diagram for Lexus SC 430 2005 List of elements for Fuel Door Release Wiring Diagram for Lexus SC 430 2005: 28 (behind right side of dash) j/c 13 Bl (under driver's seat) Computer data lines system Driver side j/b (behind left kick panel) Driver side j/b ecu E20 Fuel Fuel lid opener motor (at left side of luggage compt) Fuel lid opener switch Fuel opn (0) Fuel opn (p) Fuel opn fuse 10a Gnd Hot at all times Ii (on left side dash brace) J/c 17 (left rear of luggage compartment) L24 Luggage room j/b (at left rear corner of luggage compt) Luggage room j/b ecu Mpx+ Mpx- Mpx-b Mpx-b3 fuse 7.5a Mpx1 Mpx2 P-gnd Passenger side j/b (behind right kick panel) Red Trunk Release & Pull Down Wiring Diagram for Lexus SC 430 2005 List of elements for Trunk Release & Pull Down Wiring Diagram for Lexus SC 430 2005: 42 (behind right side of dash) j/c 13 B20 Bl (under driver's seat) Center j/b (behind right center Cncl Computer data lines system D20 Driver side j/b (behind left kick panel) Driver side j/b ecu E12 F17 Fuel opn fuse 10a Gnd Hot at all times Ig (left side of steering column) Ih (under steering column) Ii (on left side dash brace) J/c 17 (left rear of luggage compartment) L-o/c (p) L22 L24 Lcm+ Lct Lcte Lcty Luggage compartment door lock motor & detection switch (in luggage compt, near lock assembly) Luggage compartment door opener main switch Luggage compartment door opener switch Luggage room j/b (at left rear corner of luggage compt) Luggage room j/b ecu Mpx+ Mpx- Mpx-b Mpx-b3 fuse 7.5a Mpx1 Mpx2 Of dash) P-gnd Passenger side j/b (behind right kick panel) Red Sliding roof control ecu (in left rear of luggage compt) Tsw
WARNING SYSTEMS Key Reminder & Seat Belt Warning Wiring Diagram for Lexus SC 430 2005 List of elements for Key Reminder & Seat Belt Warning Wiring Diagram for Lexus SC 430 2005: 58 A21 A22 Air bag sensor assembly (at center of dash, below radio) Bl (under driver's seat) Buzzer Center j/b (behind right center of dash) Combination meter Computer data lines system Cty D-ig fuse 10a D17 Dbkl Driver door ecu (in driver's door) Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) E16 E17 F15 Front passenger seat belt warning light Fsr+ Fsr- Gateway ecu (behind right side of dash) Hot at all times Hot in acc or on Hot in on or start Ig+ Ih (under steering column) Instrument panel j/b (behind upper center of dash) J/c 13 (behind right side of dash) J/c 18 (right rear of luggage compartment) J/c 20 (below left front seat) J/c 9 & 10 (behind top left end of dash) J10 c J9 c Ksw Left buckle switch (in left front seat belt buckle) Left door courtesy switch Mpd1 Mpd2 Mpi1 Mpi2 Mpl1 Mpl2 Mpx+ Mpx- Mpx-b2 fuse 7.5a Mpx1 Mpx2 Open door indicator Passenger side j/b (behind right kick panel) Pblt Radio 2 fuse 10a Rbe+ Red Right buckle switch & occupant detection sensor (sensor: below right front seat) (switch: in right front seat belt buckle) Seat belt indicator Transponder key computer (left side of dash, behind gauge assembly) Unlock warning switch Tire Pressure Monitoring Wiring Diagram for Lexus SC 430 2005 List of elements for Tire Pressure Monitoring Wiring Diagram for Lexus SC 430 2005: 37 (left side of steering column) ig Ant B21 B22 Buzzer Center j/b (behind right center of dash) Combination meter Computer data lines system D-ig fuse 10a D20 Driver side j/b (behind left kick panel) E16 F15 F17 Gnd Hot at all times Hot in on or start Ig+ Ih (under steering column) Junction connector 13 (behind right side of dash) Left front tire pressure antenna (at left front wheelwell) Left rear tire pressure antenna (at left rear side of luggage compt) Mpx+ Mpx- Mpx-b2 fuse 7.5a Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Pnk Right front tire pressure antenna (at right front wheelwell) Right rear tire pressure antenna (at right rear side of luggage compt) Skid control ecu (behind left end of dash) Sp1 T10 Tire pressure indicator Tire pressure monitor receiver (behind center of dash, below radio) Tire select switch
WIPER/WASHER Front Wiper/Washer Wiring Diagram for Lexus SC 430 2005 List of elements for Front Wiper/Washer Wiring Diagram for Lexus SC 430 2005: 34 Air bag C11 Combination meter Combination switch Computer data lines system D-ig fuse 10a Driver side j/b (behind left kick panel) Ed (rear of left fender) Engine room 2 r/b (on left side of engine compt, forward of strut tower) Front controller Front wiper motor (on left side of firewall) Headlamp washer circuit Hot at all times Hot in on or start Ig+ J/c 3 (in engine room 2 r/b) J/c 8 (behind left end of dash) Mpx+ Mpx- Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Passenger side j/b ecu (right side kick panel) S/m S/s Wash relay Washer fuse 20a Washer ind Washer level sensor (left front of engine compartment) Washer motor (left front of engine compartment) Wip Wiper fuse 30a Wlvl Wsh-rly Headlamp Washer Wiring Diagram for Lexus SC 430 2005 List of elements for Headlamp Washer Wiring Diagram for Lexus SC 430 2005: 32 Bu+ C11 Combination switch Computer data lines system D-ig fuse 10a Driver side j/b (behind left kick panel) Driver side j/b ecu (behind left kick panel) Ed (rear of left fender) Engine room 1 r/b (on right side of engine compt, behind strut tower) Engine room 2 r/b (on left side of engine compt, forward of strut tower) Front controller Front wiper/ washer circuit Frwa H-lp cln fuse 30a Hdcl Hdlo Head Headlight cleaner control relay (at left front of engine compt, behind bumper) Headlight cleaner motor (at left front corner of engine compt, behind headlight) Headlight cleaner switch Hot at all times Hot in on or start J/c 3 (in engine room 2 r/b) J/c 4 (in ecu box) Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Red Tx1 Wash relay Washer fuse 20a Wsh-rly
