Diagram sections — 33 (67 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 2003 List of elements for Automatic A/C Wiring Diagram (1 of 2) for Lexus SC 430 2003: 81 (at right kick panel) ik (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 T16 Tel1 Telephone computer (center rear of luggage compartment) Telin Tilt Tp1 Tpdr Tpo Tppa Tsdr Tsl Tspa Tsr Automatic A/C Wiring Diagram (2 of 2) for Lexus SC 430 2003 List of elements for Automatic A/C Wiring Diagram (2 of 2) for Lexus SC 430 2003: 58 (behind right kick panel) side j/b (behind right side of dash) junction connector 14 (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 (at 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) (at 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) Etam F11 Fan relay Gnd Gnd (vz) Gnd(m) Gnd(s) Hot at all times Hot in acc or on Htr relay If (at left kick panel) Ii (on left side dash brace) 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 Passenger side j/b (behind right kick panel) Pre Radio 2 fuse 10a Rfc Tam Vz (gnd)
ANTI-LOCK BRAKES Anti-lock Brakes Wiring Diagram (1 of 2) for Lexus SC 430 2003 List of elements for Anti-lock Brakes Wiring Diagram (1 of 2) for Lexus SC 430 2003: 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 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 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 If (at left kick panel) 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 2003 List of elements for Anti-lock Brakes Wiring Diagram (2 of 2) for Lexus SC 430 2003: 73 (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 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 Power Door Locks Wiring Diagram (1 of 2) for Lexus SC 430 2003 List of elements for Power Door Locks Wiring Diagram (1 of 2) for Lexus SC 430 2003: 74 (behind right side of dash) junction connector 13 Bdr Bl (under driver's seat) Bq (at right quarterpanel) 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 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 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 S17 S18 Security fuse 7.5a Sig Sliding roof control ecu (in left rear of luggage compt) Tail fuse 7.5a Wls1 Wlsw Power Door Locks Wiring Diagram (2 of 2) for Lexus SC 430 2003 List of elements for Power Door Locks Wiring Diagram (2 of 2) for Lexus SC 430 2003: 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 Airbag 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 Wireless door lock control receiver (on center of roof header)
BODY CONTROL MODULES Driver Side J/B ECU Wiring Diagram for Lexus SC 430 2003 List of elements for Driver Side J/B ECU Wiring Diagram for Lexus SC 430 2003: 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 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 2003 List of elements for Front Controller Wiring Diagram for Lexus SC 430 2003: 32 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 Hot w/ head lp relay energized 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 2003 List of elements for Luggage Room J/B ECU Wiring Diagram for Lexus SC 430 2003: 50 Bck1 Bk/up Bp (at left quarterpanel) 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 17 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 2 Tail1 Til1 Til2 Trunk, tailgate & fuel doors system Passenger Side J/B ECU Wiring Diagram for Lexus SC 430 2003 List of elements for Passenger Side J/B ECU Wiring Diagram for Lexus SC 430 2003: 48 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 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 2003 List of elements for Data Link Connector Wiring Diagram for Lexus SC 430 2003: 32 (left side of steering column) ig (under steering column) ih A21 Air bag sensor assembly (at center of dash below radio) 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 M6 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 2003 List of elements for High/Low Bus Wiring Diagram for Lexus SC 430 2003: 93 A/c control assembly (behind center of dash) A10 A21 Acc Air Air bag sensor assembly (at center of dash, below radio) 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 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 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) Passenger's power seat ecu (under passenger's seat) 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) Telephone computer 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) Tx+ Tx- Tx1 Txs+ Txs- W/ link system W/ navigation Wfse
COOLING FAN Cooling Fan Wiring Diagram for Lexus SC 430 2003 List of elements for Cooling Fan Wiring Diagram for Lexus SC 430 2003: 32 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) E1 (in engine 4 harness, near breakout to positive battery cable) 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 fuse 2 40a Fan fuse 40a Fan relay Gnd(m) Gnd(s) Heater fuse 10a Hot at all times Hot in on or start If (at left kick panel) Ii (on left side dash brace) Junction connector 14 (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 2003 List of elements for Cruise Control Wiring Diagram for Lexus SC 430 2003: 94 (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 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) 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 j5 box) Me01 Mpx1 Mpx2 Mrel Nca Neo Nssd Park/ neutral position switch (on transmission) Passenger side j/b (behind right kick panel) Pnk Red Res/ acc Set/ coast Sil Skid control ecu (behind left end of dash) Sp1 Sp2+ Sp2- Speedometer St1- Stop fuse 5a Stoplight 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 (electonically Vpa Vpa2 Vptk Vta Vta2 Wfse
DEFOGGERS Heated Mirrors Wiring Diagram for Lexus SC 430 2003 List of elements for Heated Mirrors Wiring Diagram for Lexus SC 430 2003: 36 (behind (under driver's seat) bl Bdr Bq (at right quarterpanel) 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 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 2003 List of elements for Rear Defogger Wiring Diagram for Lexus SC 430 2003: 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 Red
ELECTRONIC POWER STEERING Electronic Power Steering Wiring Diagram for Lexus SC 430 2003 List of elements for Electronic Power Steering Wiring Diagram for Lexus SC 430 2003: 41 +bi +bo Abs-ig fuse 7.5a Bat Center j/b (behind right center of dash) Combination meter D/g Data link connector 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 of 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 2003 List of elements for 4.3L, Engine Performance Wiring Diagram (1 of 6) for Lexus SC 430 2003: 77 (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: 24 (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: 46 (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: 32 (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: 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 2003 List of elements for 4.3L, Engine Performance Wiring Diagram (6 of 6) for Lexus SC 430 2003: 77 (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-
EXTERIOR LIGHTS Back-up Lamps Wiring Diagram for Lexus SC 430 2003 List of elements for Back-up Lamps Wiring Diagram for Lexus SC 430 2003: 50 A/c control assembly (behind center of dash) A10 Air bag sensor assembly (at center of dash, below radio) B j4 B j5 Back- up light switch Bck1 Bk/up Bl (under driver's seat) Bp (at left quarterpanel) C11 Combination meter Combination switch (on steering column, behind steering wheel) c11 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 with ig1 relay energized J/c 17 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 2003 List of elements for Exterior Lamps Wiring Diagram (1 of 2) for Lexus SC 430 2003: 70 (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) Bp (at left quarterpanel) Bubs C11 C16 Center j/b (behind right center of dash) Combination switch (on steering column, behind steering wheel) 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 with ig1 relay energized Ig (left side of steering column) Instrument panel j/b (behind upper center of dash) J/c 17 J25 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 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 2003 List of elements for Exterior Lamps Wiring Diagram (2 of 2) for Lexus SC 430 2003: 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 with ig1 relay energized 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 Stoplight 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 2003 List of elements for Ground Distribution Wiring Diagram (1 of 3) for Lexus SC 430 2003: 73 A/c control assembly A/c single pressure switch A11 Acc relay Airbag sensor assembly Audio door control switch B10 B11 B20 B21 B22 B27 Brake actuator Brake fluid level warning switch C13 C14 C20 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 (left kick panel) Driver side j/b ecu E12 E14 E20 Electronically controlled transmission pattern select switch F14 F15 F16 F17 F18 Fuel lid opener switch Gateway ecu Glove box light switch Headlight beam level control ecu Ig (left side of steering column) Ig1 relay Ih (under steering column) Ii (left dash brace) Ij (right dash brace) Inner mirror J/c j11 (below radio) J/c j9 & j10 (top left end of dash) Left vanity light Luggage compartment door opener main switch Luggage compartment door opener switch Mirror retractor switch, head light cleaner switch & security indicator light Multi- display Passenger side j/b (right kick panel) Passenger side j/b ecu Personal light, garage door opener & telephone microphone Power outlet Radio & player Right vanity light Seat heater switch 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 2003 List of elements for Ground Distribution Wiring Diagram (2 of 3) for Lexus SC 430 2003: 67 (left side of engine compt) engine room no. 2 r/b (top center of engine) A/c dual pressure switch A/c magnetic clutch & lock sensor A14 A16 A22 Brake actuator Combi- nation switch Controller blower motor Cooling fan ecu D31 Data link connector Driver's side j/b (left kick panel) E19 Ea (right front fender) Eb (side of right cylinder head) Ec (side of left cylinder head) Ed (left front fender Ee (left front fender) Efi relay Engine control module Engine hood courtesy switch Engine oil level sensor Engine room no. 1 r/b (right side of engine compt) 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 2 sensor 1) Heated oxygen sensor (bank 2 sensor 2) If (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 Ik (right kick panel) J/c j14 (right kick panel) J/c j3 (in engine room no.2 r/b) J/c j4 (in ecu box) J/c j7 (in ecu box) J/c j8 (behind left kick panel) J/c j9 & j10 (top left end of dash) Left front fog light Left front parking light Left front side marker light Left front turn signal light Left headlight (high) Left headlight (low) Park/neutral position switch, a/t indicator light switch & backup 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 (low) Skid control ecu Telephone computer Washer level sensor Washer motor Ground Distribution Wiring Diagram (3 of 3) for Lexus SC 430 2003 List of elements for Ground Distribution Wiring Diagram (3 of 3) for Lexus SC 430 2003: 59 (under A12 A13 A17 Auto antenna control relay B19 Bm (under front passenger's seat) Bn (left quarter panel) Bo (near stereo component amplifier) Bp (left quarter panel) Bq (right quarter panel) C10 C11 Driver door ecu Driver's seat) Fuel lid opener motor Fuel pump High mounted stop light J/c j16 (right rear of luggage compt) J/c j17 (left quarter panel) J/c j18 (right quarter panel) J/c j19 (under left side of driver's seat) J/c j20 (under right side of driver's seat) J/c j21 (under left side of front passenger's seat) J/c j22 (under right side of front passenger's seat) Left back-up light switch Left buckle switch Left rear combi- nation light Left rear side marker light Luggage room j/b (left rear corner of luggage compt) Luggage room j/b ecu Lumbar support control switch (driver's slide) Lumbar support control switch (front passenger's seat) Mayday switch Navi- gation ecu 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 front vertical) Power seat position sensor (driver's lifter) Power seat position sensor (driver's reclining) Power seat position sensor (driver's slide) Power seat position sensor (front passenger's front vertical) Power seat position sensor (front passenger's lifter) Power seat position sensor (front passenger's reclining) Power seat position sensor (front passenger's slide Rear window defogger Right back-up light switch Right buckle switch & occupant detection sensor Right rear combi- nation light Right rear side marker light Seat heater controller (driver's seat) Seat heater controller (front passenger's seat) Sliding roof control ecu Stereo component amplifier Telephone computer Telephone micro- phone amplifier
HEADLIGHTS Headlamps Wiring Diagram (1 of 2) for Lexus SC 430 2003 List of elements for Headlamps Wiring Diagram (1 of 2) for Lexus SC 430 2003: 67 (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 of steering column) Ig (left side of steering column) Ig+ Ih (under steering column) Ii (on left 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 2003 List of elements for Headlamps Wiring Diagram (2 of 2) for Lexus SC 430 2003: 38 (on left side of engine compartment. forward 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 If (at left kick panel) Ik (at right kick panel) Junction connector 14 Junction connector 3 (in engine room 2 r/b) Junction connector 8 Left front fog light Left headlight (high) Left headlight c0ntrol ecu Main fuse 50a Mpx1 Mpx2 Passenger side j/b (behind right kick panel) Red Right front fog light Right headlight (high) Right headlight c0ntrol ecu Tail-rly Headlamps Leveling Wiring Diagram for Lexus SC 430 2003 List of elements for Headlamps Leveling Wiring Diagram for Lexus SC 430 2003: 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 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 (at front of engine compartment, 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 Red Rh+ Rh- Rh1 Rh2 Rh3 Rh4 Rhe Rhg Rht Right headlight beam level control actuator (at front of engine compartment, 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 2003 List of elements for Horn Wiring Diagram for Lexus SC 430 2003: 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 Mpx Mpx1 Mpx2 Mpx3 Pnk Right horn Security fuse 7.5a
INSTRUMENT CLUSTER
INTERIOR LIGHTS Courtesy Lamps Wiring Diagram (1 of 2) for Lexus SC 430 2003 List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Lexus SC 430 2003: 67 A/c control assembly (behind center of dash) A10 Air bag Bq (at right quarterpanel) 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) Drivers 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 I/p junction block (behind upper center of dash) Ig (left side of steering column) Ignition key cylinder light Ih (under steering column) Ile J/c 13 (behind right side of dash) J/c 18 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 2003 List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Lexus SC 430 2003: 63 (in left front seat belt buckle) left buckle switch (under driver's seat) Air bag sensor assembly (at center of dash, below radio) Bdr Bl (under driver's seat) Bp (at left quarterpanel) Bq (at right quarterpanel) 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 J/c 18 J/c 20 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 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 2003 List of elements for Instrument Illumination Wiring Diagram (1 of 2) for Lexus SC 430 2003: 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 I/p junction block Ig (left side of steering column) Ih (under steering column) Ii (on left side dash brace) 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 2003 List of elements for Instrument Illumination Wiring Diagram (2 of 2) for Lexus SC 430 2003: 61 Air bag Air bag sensor assembly (at center of dash, below radio) Bdr Bl (under driver's seat) Bp (at left quarterpanel) Bq (at right quarterpanel) 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 J/c 18 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 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 2003 List of elements for Memory Systems Wiring Diagram (1 of 3) for Lexus SC 430 2003: 77 (if equipped) mirror retractor switch Bdr Bl (under driver's seat) 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 J/c 4 & 5 (in ecu box) J5 b Left remote control mirror Lt/rt m Luggage room j/b (at left rear corner of luggage compt) 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 Sensor Sig Up/dn m Vssr W/ mirror retractor Memory Systems Wiring Diagram (2 of 3) for Lexus SC 430 2003 List of elements for Memory Systems Wiring Diagram (2 of 3) for Lexus SC 430 2003: 64 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 lumbar support control switch Driver's power seat control switch Driver's power seat ecu (under driver's seat) Driver's seat front vertical control sensor Driver's seat front vertical motor Driver's seat lifter control sensor Driver's seat lifter motor Driver's seat lumbar support control motor Driver's seat reclining control sensor Driver's seat reclining motor Driver's seat slide control sensor Driver's seat slide motor 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 J/c 20 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 2003 List of elements for Memory Systems Wiring Diagram (3 of 3) for Lexus SC 430 2003: 48 Bm (under passenger's seat) Computer data lines system Fdwn Frv+ Frv- Fup Gnd Hot at all times J/c 21 J/c 22 Ldwn Lft+ Lft- Lup Mpx1 Mpx2 P p/seat fuse 30a P23 P24 Passenger side j/b (behind right kick panel) Passenger's lumbar support conrol switch Passenger's power seat control switch Passenger's power seat ecu (under passenger's seat) Passenger's seat front vertical control sensor Passenger's seat front vertical motor Passenger's seat lifter control sensor Passenger's seat lifter motor Passenger's seat lumbar support control motor Passenger's seat reclining control sensor Passenger's seat reclining motor Passenger's seat slide control sensor Passenger's seat slide motor Pvcc Rcl+ Rcl- Rclf Rclr Red Sgnd Sld+ Sld- Sldf Sldr Ssfv Ssrr Ssrs Ssrv Sysb
NAVIGATION Navigation Wiring Diagram for Lexus SC 430 2003 List of elements for Navigation Wiring Diagram for Lexus SC 430 2003: 91 (behind left side of dash) data link connector (dlc) 3 (in body harness, near breakout to rear woofer) (on left side of engine compartment, forward of strut tower) +b1 Acc Air conditioning system Atx+ Atx- Aui+ Aui- Auo+ Auo- B13 B18 Bo (near stereo component amplifier) Bq (at right quarterpanel) Center j/b (behind right center of dash) Computer data lines system D11 D18 D20 Driver side j/b (behind left kick panel) E10 E11 E16 E17 Engine room 1 r/b (on right side of engine compt, behind strut tower) Engine room 2 G10 Gnd Gnd1 Hot at all times Hot in on or acc Hot in on or start Hot in start Ig (left side of steering column) Ih (under 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 J/c 18 J/c 9 & 10 (behind top left end of dash) J10 Left door speaker (squawker & tweeter) Mtx+ Mtx- Multi-display 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 Opn P-ig fuse 10a Parking brake switch (behind left side of dash) Passenger side j/b (behind right kick panel) Passenger side j/b ecu Pkb Pnk R/b Radio & player Radio 1 fuse 30a Radio 2 fuse 10a Re1 Re2 Red Red/ Rev S23 Sp+ Sp- Spd St1 Starter fuse 7.5a Stereo component amplifier (at right rear corner of luggage compt) Sync Tdx+ Tdx- Tfl+ Tfl- Tilt Tv fuse 5a Tx+ Tx- Txs+ Txs-
PASSIVE RESTRAINTS Passive Restraints Wiring Diagram for Lexus SC 430 2003 List of elements for Passive Restraints Wiring Diagram for Lexus SC 430 2003: 24 A21 A22 Air bag Air bag sensor assembly (at center of dash, below radio) Bkll Bklr Bl (under driver's seat) Bq (at right quarterpanel) 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 J/c 20 Left buckle switch (in left front seat belt buckle) Left tension reducer solenoid (at base of left "b" pillar) Mpx2 Passenger side j/b (behind right kick panel) Passenger side j/b ecu Rbe+ Right buckle switch (in left front seat belt buckle) Right tension reducer solenoid (base of right "b" pillar)
POWER ANTENNA Power Antenna Wiring Diagram for Lexus SC 430 2003 List of elements for Power Antenna Wiring Diagram for Lexus SC 430 2003: 23 (on right side of engine compt, behind strut tower) Anta Auto antenna control relay & motor (at right side of luggage compt) Bq (at right quarterpanel) Center j/b (behind right center of dash) E13 E17 Engine room 1 r/b 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 J/c 18 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 2003 List of elements for Power Distribution Wiring Diagram (1 of 3) for Lexus SC 430 2003: 70 Abs 1 fuse 60a Abs 2 fuse 40a Accy Air conditioning system Alt fuse 120a Alt-s fuse 5a Am1 fuse 5a Am2 fuse 30a Anti-lock brake system Battery C13 Cooling fan system Cruise control, engine, transmission systems Cruise control, transmission, engine anti-theft, anti-lock brakes systems D-door fuse 25a D/c cut fuse 15a Driver side j/b (behind left kick panel) E17 Ecu box) Efi 2 fuse 10a Efi fuse 25a Efi relay Engine control module (left side of engine compt, in e Engine room no.1 r/b (on right side of engine compt, behind strut tower) Engine room no.2 r/b (on left side of engine compt, behind strut tower) Engine system Etcs fuse 15a Exterior lights, door locks, anti-theft, body computer systems Fan 2 fuse 40a Fan fuse 40a From ignition switch b (diagram 1 of 3) H-lp l lwr fuse 15a H-lp r lwr fuse 15a H-lp upr fuse 20a Headlamp relay Headlight body computer systems Heater fuse 50a Horn fuse 10a Horn, computer data line, door locks, anti-theft systems Ig2 fuse 7.5a Ig2 main fuse 20a Ig2 relay Ign fuse 5a Ignition switch Inj fuse 10a Interior light, defogger, computer data line, power window, power mirror power tops, door locks, anti-theft systems J/c 2 Main fuse 50a Off P-door fuse 25a Passenger side j/b (behind right kick panel) Radio 1 fuse 30a Red Short pin 1 Short pin 2 Sound system Start Starter fuse 5a Starter relay Starting, engine systems Starting/ charging system Tel fuse 5a Telephone computer To driver side j/b (diagram 3 of 3) To engine room no 2 r/b (diagram 1 of 1) 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) Transmission, engine, starting/ chaging, navigation systems Turn-haz fuse 15a Power Distribution Wiring Diagram (2 of 3) for Lexus SC 430 2003 List of elements for Power Distribution Wiring Diagram (2 of 3) for Lexus SC 430 2003: 72 A/c fuse 5a Acc relay Accy Air conditioning, instrument cluster systems Air conditioning, starting/charging, instrument cluster, headlight, engine, interior lights, body computer, srs, power tops, exterior lights, anti-lock brakes, wiper/washer, sound, cruise control systems Body computer exterior lights systems Body computer, sound, defogger, anti-theft, door lock systems C10 C12 C17 Cig fuse 15a Cigarette lighter D5 not used Defog fuse 30a Defog relay Defogger system Dome fuse 7.5a E13 E17 Engine room no.1 r/b (on right side of engine compt, behind strut tower) Engine, mirror, seats, power windows, power tops, door locks, anti-theft, body computer systems F11 From driver side j/b (diagram 3 of 3) From engine room f no 1 r/b (diagram 1 of 1) From engine room no.1 r/b (diagram 1 of 3) From ignition switch (diagram 1 of 3) Fuel opn fuse 10a Gnd H-lp cln fuse 30a H-lp lvl fuse 5a Headlight cleaner motor Headlights system Headlights, exterior lights, wiper/washer, body computer systems Headlights, interior lights, body computer, mirrors, exterior lights, wiper/washer trunk,tailgate, fuel doors systems I10 I19 I21 Ig (left side of steering column) Ig1 relay Ii (left instrument panel brace) Jc/11 (below center of dash, below radio) Lce-lp fuse 7.5a Lgg lh fuse 20a Lgg rh fuse 20a Luggage room j/b (at left rear corner of luggage compt) Luggage room j/b ecu Mpx-b1 fuse 7.5a Mpx-b2 fuse 7.5a Mpx-b3 fuse 7.5a Navigation system Not used 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 lh fuse 20a Roof rh fuse 20a Rr j/b fuse 50a Seat htr fuse 20a Seats system Sound system, navigation, seats, shift interlock, mirrors systems Systems To driver side j/b (diagram 3 of 3) Tv fuse 5a Washer fuse 20a Wiper/washer, body control module Wiper/washer, interior lights, body computer, mirrors, power antenna, sound, cellular phone, anti-theft, power window, rea defogger systems Power Distribution Wiring Diagram (3 of 3) for Lexus SC 430 2003 List of elements for Power Distribution Wiring Diagram (3 of 3) for Lexus SC 430 2003: 62 Abs-ig fuse 7.5a Acc relay Accy Air conditioning system Air conditioning, cooling fans, body computer systems Air conditioning, headlights, interior lights, power mirrors, body computer, memory, power tops, exterior lights, anti-theft, door locks, wipep/washer, power windows systems Air conditioning, starting/charging, instrument cluster cruise control, transmission, engine, headlights, interior lights, warnings, navigation, memory, sound, power tops, srs, exterior lights anti-lock brakes, wiper/washer systems Anti-lock brakes system Body computer system Body computer, power window, door locks, power window, anti-theft systems Body computer, wiper/washer systems C11 C16 Cruise control, engine, transmission, body computer systems Cruise control, transmission, engine, srs, anti-lock brakes systems D p/seat fuse 30a D-ig fuse 10a Driver side j/b (behind left kick panel) E10 E11 Exterior lights, starting/charging, cruise control, headlights, power mirrors, power tops system 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 Headlight, exterior lights, door lock, anti-theft, body control systems Headlights, body computer systems Heater fuse 10a Horn, body computer systems I15 I16 I17 Ig1 relay Ii (left instrument panel brace) J10 Memory systems Memory, seats systems Mpx-ig Mpx-ig fuse 7.5a Not used Obd fuse 7.5a Panel fuse 5a Panel1 Pnk Power outlet Power window, power tops, power mirror, defogger, body computer, anti-theft, door locks system 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 system system
POWER MIRRORS Electrochromic Mirror Wiring Diagram for Lexus SC 430 2003 List of elements for Electrochromic Mirror Wiring Diagram for Lexus SC 430 2003: 27 Center j/b (behind right center of dash) D19 D20 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
POWER SEATS Heated Seats Wiring Diagram for Lexus SC 430 2003 List of elements for Heated Seats Wiring Diagram for Lexus SC 430 2003: 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 front 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 J/c 21 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 Retractable Hardtop Provision Wiring Diagram (1 of 2) for Lexus SC 430 2003 List of elements for Retractable Hardtop Provision Wiring Diagram (1 of 2) for Lexus SC 430 2003: 81 Blgl Blgr Bp (at left quarterpanel) j/c 17 Bpt Brfl Brfr C10 red Cls Computer data lines system Cpub Hot at all times L22 L24 Lct Lcte Lcty Left quarter power window motor 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) 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) Limit switch (tonneau cover) 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 compt door detection switch 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 Retractable Hardtop Provision Wiring Diagram (2 of 2) for Lexus SC 430 2003 List of elements for Retractable Hardtop Provision Wiring Diagram (2 of 2) for Lexus SC 430 2003: 65 (at right rear side of luggage compt) (right luggage front lock) limit switch (package tray 2) limit switch (right rear of luggage compt) (luggage compartment door open & close) limit switch (roof open) limit switch (roof position 3) limit switch A/c control assembly (behind center of dash) A10 B2 (in body harness, near roof position limit switch 3) Bm (under passengers seat) Bq (at right quarterpanel) 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 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 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 2003 List of elements for Power Windows Wiring Diagram for Lexus SC 430 2003: 89 (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) Bq (at right quarter- panel) 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 J/c 18 J/c 9, j/c 10 (behind top left end of dash) J10 J9 f Junction connector 13 (behind right side of dash) Kul Left door courtesy switch Left door key lock & unlock switch Left power window motor 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 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 Wireless door lock control receiver (on center of roof header) Wls1 Wlsw
RADIO Radio Wiring Diagram (1 of 2) for Lexus SC 430 2003 List of elements for Radio Wiring Diagram (1 of 2) for Lexus SC 430 2003: 59 (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) J/c 9 & 10 (behind top left end of dash) J10 Mpx+b Mpx-b2 fuse 7.5a 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- Txs+ Txs- W/ navigation Radio Wiring Diagram (2 of 2) for Lexus SC 430 2003 List of elements for Radio Wiring Diagram (2 of 2) for Lexus SC 430 2003: 62 Acc Aui+ Aui- Bo (near stereo component amplifier) Fl+ Fl- Fr+ Fr- Gnd J/c 15 Left door speaker (squawker & tweeter) Left front woofer Left rear speaker Mtx+ Mtx- Mute N-mu Nav+ Nav- Navi Navigation amplifier (at right rear corner of luggage compartment) Navo Pnk Rear woofer Red Right door speaker (squawker & tweeter) Right front woofer Right rear speaker Rl+ Rl- Rr+ Rr- S13 S14 S22 S23 Short connector s13 & s14 (at rear center of luggage compartment) Sp+ Sp- Spd Spi+ Spi- Stereo component amplifier (at right rear corner of luggage compt) T16 T18 T19 Tdx+ Tdx- Telephone computer (center rear of luggage compt) Tfl+ Tfl- Tfr+ Tfr- Tmut W/ cellular phone W/ navigation W/ navigation system W/o cellular phone W/o navigation W/o navigation system Wf+ Wf-
SHIFT INTERLOCK Shift Interlock Wiring Diagram for Lexus SC 430 2003 List of elements for Shift Interlock Wiring Diagram for Lexus SC 430 2003: 25 (behind left side of dash) unlock warning switch & 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 2003 List of elements for Charging Wiring Diagram for Lexus SC 430 2003: 23 Alt fusible link 120a 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 compt, behind strut tower) F15 Generator Hot in on or start Ig+ Ih (under steering column) Junction connector 4 & junction connector 5 (in ecu box) Mpx+ Mpx1 Mpx2 Nca Passenger side j/b (behind right kick panel) Red Starting Wiring Diagram for Lexus SC 430 2003 List of elements for Starting Wiring Diagram for Lexus SC 430 2003: 22 Acc Am2 Am2 fuse 30a Battery Battery ground Ed (rear of left fender) Engine control module (at left side of engine compt, in ecu box) Engine room 1 r/b (on right side of engine compt, forward of strut tower) Engine room 2 r/b (on left side of engine compt, forward of strut tower) Ignition switch Junction connector 3 (in engine room 2 r/b) Lock Nca 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 2003 List of elements for Supplemental Restraints Wiring Diagram (1 of 2) for Lexus SC 430 2003: 54 (at base of left "b" pillar) left pretensioner +sl +sr -sl -sr A20 A21 A22 Air bag sensor assembly (at center of dash, below radio) Air bag squib (steering wheel pad) 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 j18 (at right quarter panel) Left door side air bag sensor Left side air bag squib 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 & occupant detection sensor (under passenger's seat) Right door side air bag sensor 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 Sfl+ Sfl- Sfr+ Sfr- Sil Ssl+ Ssl- Ssr+ Ssr- Vupl Vupr Supplemental Restraints Wiring Diagram (2 of 2) for Lexus SC 430 2003 List of elements for Supplemental Restraints Wiring Diagram (2 of 2) for Lexus SC 430 2003: 48 (on left side dash brace) ii (partial) (behind left side of dash) (under steering column) ih A/c control assembly (behind center of dash) A10 Air bag Air bag squib (front passenger air bag asssembly) Bl (under driver's seat) Combination meter D-ig fuse 10a Data link connector 3 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 compartment, in ecu box) Engine room 2 r/b (on left front of engine compartment, forward of strut tower) Esl F13 F15 Front controller Gateway ecu (behind right side of dash) Hot in on or start J/c 20 (under right side of driver's 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 compartment) Left side air bag sensor (behind interior trim, forward of left 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 compartment) Skid control ecu (behind left side of dash) Solid state Srs 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 2003 List of elements for A/T Wiring Diagram (1 of 2) for Lexus SC 430 2003: 66 (engine harn, in ecu box) 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, behind strut tower) Epa Eptk Etcs fuse 15a F15 Hot at all times Hot in on or start 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 2003 List of elements for A/T Wiring Diagram (2 of 2) for Lexus SC 430 2003: 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 2003 List of elements for Fuel Door Release Wiring Diagram for Lexus SC 430 2003: 29 (behind right side of dash) j/c 13 Bl (under driver's seat) Bp (at left quarterpanel) 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 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 2003 List of elements for Trunk Release & Pull Down Wiring Diagram for Lexus SC 430 2003: 43 (behind right side of dash) j/c 13 B20 Bl (under driver's seat) Bp (at left quarterpanel) 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 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 2003 List of elements for Key Reminder & Seat Belt Warning Wiring Diagram for Lexus SC 430 2003: 59 A21 A22 Air bag sensor assembly (at center of dash, below radio) Bl (under driver's seat) Bq (at right quarterpanel) 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 J/c 20 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 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 2003 List of elements for Tire Pressure Monitoring Wiring Diagram for Lexus SC 430 2003: 36 (left side of steering column) ig 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 2003 List of elements for Front Wiper/Washer Wiring Diagram for Lexus SC 430 2003: 35 Airbag 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 If (at left kick panel) Ig+ J/c 3 (in engine room 2 r/b) J/c 8 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 Washer motor Wip Wiper fuse 30a Wlvl Wsh-rly Headlamp Washer Wiring Diagram for Lexus SC 430 2003 List of elements for Headlamp Washer Wiring Diagram for Lexus SC 430 2003: 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
