Lexus SC I (1991-2001) org/ Wiring diagrams

1 2 3 4 PWRL 1 2 3 8 9 10 16 BATT SNWL SNWI 2 IND 3 IND 4 IND 6 11 15 20 STP PWR A/T OIL TEMP ACCELERATOR POSITION SENSOR (RIGHT REAR OF ENGINE) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE D IND EFI FUSE EFI MAIN RELAY ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SWITCH ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID (IN TRANSMISSION) ENGINE CONTROL MODULE ENGINE CONTROLS (COMBINATION METER) ENGINE COOLANT TEMPERATURE SENSOR (RIGHT FRONT OF ENGINE) GAUGE FUSE GRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR START IGN FUSE IGSW MREL +B INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) L IND LT GRN WIRE N IND NCO+ PNK WIRE NO. 1 NO. 2 NO. 3 NO. 4 O/D DIRECT CLUTCH SPEED SENSOR (ON TRANS- MISSION) OIL ORG/ WIRE P IND PNK WIRE PWR IND R IND R/B 2 (LEFT SIDE OF ENGINE COMPT) RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE SLN- SLT- SLU+ SLU+ SLN+ SLT+ NCO- SLU- SLN- SLN- SLT- SNOW IND STARTING/ CHARGING SYSTEM STOP FUSE STOPLIGHT SWITCH (ON BRAKE PEDAL BRACKET) THROTTLE POSITION SENSOR (ON THROTTLE BODY) TRANSMISSION CONTROL SWITCH (2 - L) (NEAR GEAR SELECTOR) TRANSMISSION CONTROL SWITCH (D - 4) (NEAR GEAR SELECTOR) VEHICLE SPEED SENSOR (ON TRANS- MISSION) VIO WIRE VTA THW WHT (OR GRN) WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE YEL/RED WIRE

+B MH MC MFRS MREC IG+ TR MFACE MDEF A/C CONTROL ASSEMBLY A/C SOLAR SENSOR (AT UPPER RIGHT SIDE OF DASH) AIR INLET CONTROL SERVO MOTOR (BEHIND RIGHT SIDE OF DASH) AIR MIX CONTROL SERVO MOTOR (BEHIND RIGHT SIDE OF DASH) AIR VENT MODE CONTROL SERVO MOTOR (BEHIND CENTER OF DASH) AMOUT REOST WV MGC TC TAIL BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BLW HR RDFGR CFAN BRN WIRE BRN/WHT WIRE DEF FACE DEFOGGER SYSTEM FR RECIRC GRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HOT COOL IGN A/C IN IGNITER (ON LEFT SIDE OF LEFT STRUT TOWER) INSTRUMENT CLUSTER SYSTEM INTERIOR LIGHTS SYSTEM (RHEOSTAT) J/B 1 (BEHIND LEFT KICK PANEL) J/B 3 (BEHIND CENTER OF DASH) LOCK IN SAUT LP LT GRN WIRE LT GRN/RED WIRE LT SC 300 ONLY ORG/ WIRE PNK 22 23 24 25 WIRE RED WIRE RED/BLU WIRE RED/YEL WIRE SC 400 ONLY SG TEL IN TP TPI SPD TPM TACH TEL TR TAM TE TW TS PNK WIRE VER VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 IGB SOL+ SOL- A/C ACMG IDL A/C CONTROL SWITCH, RADIO SWITCH A/C EVAPORATOR TEMP. SENSOR (BEHIND RIGHT SIDE OF DASH) A/C MAGNETIC CLUTCH (ON A/C COMPRESSOR) A/C ROOM TEMPERATURE SENSOR (BEHIND CENTER OF DASH) AUTO BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLOWER MOTOR (BEHIND RIGHT SIDE OF DASH) BLOWER MOTOR CONTROL RELAY (BEHIND RIGHT SIDE OF DASH) BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE CIG FUSE COOLING FAN ECU (SC 400) (BEHIND RIGHT SIDE OF DASH) DATA LINK CONNECTOR 1 (DLC) (PARTIAL) (AT LEFT REAR SIDE OF ENGINE) DEF RELAY ENGINE CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) GND B+ SI GRN WIRE GRN/ORG WIRE GRN/YEL WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START HOT IN ON OR START ECU-IG FUSE HOT W/LIGHT SWITCH IN TAIL OR HEAD HTR FUSE HTR RELAY IDL TAC COOL HP TH+ TH- INSTRUMENT CLUSTER SYSTEM J/B 1 (BEHIND LEFT KICK PANEL) J/B 3 (BEHIND CENTER OF DASH) LT GRN WIRE LT GRN/RED WIRE MG CLT RELAY ORG/ WIRE PANEL FUSE PNK 22 23 24 25 WIRE PNK WIRE R/B 2 (ON LEFT SIDE OF ENGINE COMPARTMENT, BEHIND BATTERY) R/B 2 (ON LEFT SIDE OF ENGINE COMPARTMENT, BEHIND BATTERY) DOME FUSE RADIO TEMP CONTROL SWITCH RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE SC 300 SC 400 SOLENOID VALVE (COOLING FAN) (SC 400) (AT LEFT FRONT OF ENGINE) VIO WIRE VIO/WHT WIRE VSV (WATER VALVE) (ON RIGHT SIDE OF FIREWALL) WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE

ABS ECU (BEHIND RIGHT SIDE OF DASH) ABS, TRACTION ECU (ABOVE BASE OF RIGHT B-PILLAR) BLK WIRE BLK/RED WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE COMBINATION METER (UNDER LEFT SIDE OF ASHTRAY) ECU-IG FUSE GAUGE FUSE HOT IN ON OR START IG SPD J/B 1 (BEHIND LEFT KICK PANEL) J/B 3 (BEHIND CENTER OF DASH) LT GRN WIRE ORG/ WIRE PPS ECU (BEHIND RIGHT SIDE OF DASH) PPS SOLENOID (AT LEFT FRONT OF ENGINE) RED WIRE SOL- SOL+ W/ TRACTION CONTROL W/O TRACTION CONTROL WHT WIRE WHT/BLK WIRE YEL WIRE YEL/GRN WIRE

A/C AND ELECTRONIC POWER STEERING SYSTEMS A/C CONTROL ASSEMBLY ABS IND. ANTI-LOCK BRAKE SYSTEM BLK WIRE BLK/ORG WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRAKE IND BRN WIRE CHARGE IND COMBINATION METER CRUISE IND DOOR IND DRIVE MONITOR ECU-B FUSE ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM EXTERIOR LIGHTS SYSTEM (TURN FLASHER) FUEL FUEL INJECTOR 1 FUEL SENDER (IN FUEL TANK) GRN WIRE GRN/ YEL WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HEAD IND HEAD- LIGHTS SYSTEM HIGH BEAM IND HOT AT ALL TIMES HOT IN ON OR START HOT IN RUN GAUGE FUSE HOT WITH TAILLIGHT RELAY ENERGIZED IGN FUSE ILLUMINATION J/B 1 (LEFT SIDE OF DASH) J/B 3 (BEHIND CENTER OF DASH) J/B 3 (CENTER OF DASH) LEFT TURN IND LOW FUEL IND LT GRN WIRE LT GRN/RED WIRE MALFUNCTION IND OIL IND OIL LEVEL IND OIL PRESSURE SWITCH (LEFT SIDE OF ENG) ORG/ WIRE PANEL FUSE PNK/BLU WIRE POWER IND REAR LT IND RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE RHEOSTAT RIGHT TURN IND SEAT BELT IND SNOW IND SPEEDOMETER/ ODOMETER/ TRIPMETER SRS IND STARTING/ CHARGING SYSTEM (GENERATOR) SUPPLEMENTAL RESTRAINTS SYSTEM TRAC IND TRAC OFF IND VIO WIRE VIO/WHT WIRE WARNING SYSTEM WASHER LEVEL IND WATER TEMP WATER TEMPERATURE SENDER WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) TC A/C CONTROL, RADIO SWITCH LAMP A/T SHIFT LEVER ILLUMINATION LAMP BLK WIRE BLU WIRE BRN WIRE CIGARETTE LIGHTER LAMP COMBINATION METER TAIL ELECTRONIC CONTROLLED TRANSMISSION PATTERN SELECT, SEAT HEATER SWITCH FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) FUSIBLE LINK GLOVE BOX LAMP) GLOVE BOX LIGHT SWITCH GRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/YEL WIRE HAZARD SWITCH LAMP HEAD OFF TAIL HOT AT ALL TIMES INTEGRATION RELAY (ON JUNCTION BLOCK 1) JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) LIGHT CONTROL SWITCH (PART OF COMBINATION SWITCH) LT GRN WIRE LT GRN/RED WIRE ORG/ WIRE PANEL FUSE RADIO, PLAYER LAMP RE RL RV RED WIRE RHEOSTAT SOLID STATE TAILLIGHT RELAY TRIP SWITCH, THEFT DETERRENT WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE

ABS ECU (RIGHT SIDE OF DASH) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/ YEL WIRE BLU/BLK WIRE BLU/RED WIRE BLU/YEL WIRE BRAIDED BRN WIRE COMBINATION METER ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SWITCH GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES STOP FUSE HOT IN ON OR START JUNCTION BLOCK 1 JUNCTION BLOCK 1 OBD FUSE JUNCTION BLOCK 3 MALFUNCTION INDICATOR LIGHT ORG/ WIRE PNK 5 6 WIRE PNK WIRE PWR RED WIRE RED/ BLU WIRE RED/WHT WIRE RED/YEL WIRE SNOW STOPLIGHT SWITCH (ON BRAKE PEDAL BRACKET) VAPOR PRESSURE SENSOR (RIGHT FRONT CORNER OF ENGINE COMPT) WHT RED/ WIRE WHT WIRE WHT/ BLK WIRE WHT/ BLU WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE

1 2 5 6 7 8 AC STA TC STP 3 13 14 15 16 17 SLU+ SLN- SLT- PI OIL 18 23 26 PTNK CCS 4 5 6 7 8 9 10 PNK WIRE 9 10 EOM KSW TPC IMLD TXCT RXCK CODE AIR CONDITIONING SYSTEM ANTI-LOCK BRAKES SYSTEM ANTI-THEFT BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/YEL WIRE BRAIDED BRN WIRE CRUISE CONTROL SYSTEM DATA LINK CONNECTOR 2 (1998) (LEFT SIDE OF DASH) ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID (IN TRANSMISSION) ENGINE CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES RELAY BLOCK 2 ETCS FUSE IGSW MREL SIL TRC+ ENG+ NEO +B TRC- ENG- EC JUNCTION BLOCK 1 JUNCTION BLOCK 3 KEY UNLOCK WARNING SWITCH (BEHIND LEFT SIDE OF DASH) NCO ORG/ WIRE PNK WIRE PNK/BLU WIRE RED WIRE RED/ WHT WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RSPD SIL SLU+ SLN+ SLT+ NCO- PNK WIRE STI- PWR ACMG 12 13 16 TRANSPONDER KEY AMPLIFIER (BEHIND LEFT SIDE OF DASH) VSV (VAPOR PRESSURE SENSOR) (RIGHT FRONT CORNER OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE

+BM 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 PWRL 1 2 3 BATT SNWL SNWI DI FPC 12 14 16 17 18 19 20 25 (2000) 2 3 TC STP 4 5 6 7 8 9 10 PNK WIRE A/C CONTROL ASSY ANTI-LOCK BRAKES SYSTEM BLK WIRE BLK/ WHT WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRAID BRN WIRE BRN/WHT WIRE CL+ SLU- SLN- SLT- OIL 13 14 15 17 CRUISE CONTROL SWITCH CRUISE CONTROL SYSTEM DATA LINK CONNECTOR 2 (LEFT SIDE OF DASH) ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID (IN TRANSMISSION) ENGINE CONTROL MODULE (UNUSED PINS NOT SHOWN) (BEHIND LOWER RIGHT SIDE OF DASH) GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES IGSW MREL SIL TRC+ ENG+ +B TRC- ENG- NEO IMLD EOM PI CCV STI- 4 10 JUNCTION BLOCK 1 JUNCTION BLOCK 3 KEY UNLOCK WARNING SWITCH LT GRN WIRE LT GRN/RED WIRE NCO+ PNK WIRE OCR- ORG/ WIRE PNK WIRE PNK/BLU WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RELAY BLOCK 2 ETCS FUSE RIGHT CAMSHAFT TIMING OIL CONTROL VALVE (TOP RIGHT FRONT OF ENGINE) RSPD PTNK CCS A/C SIL SLU+ SLN+ SLT+ NCO- TACH STA TACHOMETER TAIL FUSE MG CLT RELAY COOLING FAN ECU THEFT DETERENT INDICATOR TPC PWR ELS ACMG IDLO TRANSPONDER KEY AMPLIFIER (BEHIND LEFT SIDE OF DASH) TXCT CODE RXCK KSW 4 VEHICLE SPEED SENSOR (ON TRANSMISSION) VIO WIRE VSV (CANISTER CLOSED VALVE) (ON RIGHT SIDE OF ENGINE COMPT) VSV (PRESSURE SWITCHING VALVE) (UNDER RIGHT REAR OF VEHICLE) WHT RED/ WIRE WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE