Lexus SC I (1991-2001) blk Wiring diagrams

ALT FUSIBLE LINK BATTERY BLK WIRE BLK/RED WIRE BLK/WHT WIRE BLU/ORG WIRE ENGINE CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) NSW FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPARTMENT, BEHIND BATTERY) FUSIBLE LINK GRN WIRE GRN/RED WIRE IGNITION SWITCH IGSW FUSE JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) ST FUSE LOCK MAIN FUSIBLE LINK NCA WIRE PARK/ NEUTRAL POSITION SWITCH RED WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) STARTER RELAY RUN WIRE STARTER MOTOR THEFT DETERRENT, DOOR LOCK CONTROL ECU (BEHIND INSTRUMENT CLUSTER) SRLY WHT WIRE WHT/BLU WIRE

ALT FUSIBLE LINK BATTERY BLK WIRE BLK/RED WIRE BLK/WHT WIRE BLU/ORG WIRE ENGINE CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPARTMENT, BEHIND BATTERY) FUSIBLE LINK GRN WIRE IGNITION SWITCH IGSW FUSE INSTRUMENT CLUSTER SYSTEM JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) ST FUSE LOCK MAIN FUSIBLE LINK NCA WIRE PARK/ NEUTRAL POSITION SWITCH RED WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) STARTER RELAY RUN WIRE STARTER MOTOR THEFT DETERRENT, DOOR LOCK CONTROL ECU (BEHIND INSTRUMENT CLUSTER) SRLY WHT WIRE WHT/BLU WIRE

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

3.0L 3.0L, 4.0L 4.0L ALT FUSIBLE LINK ALT SENSING FUSE BATTERY BLK WIRE BLK/ORG WIRE BLK/YEL WIRE CHARGING WARNING LIGHT COMBINATION METER ENGINE FUSE FUSE BLOCK (AT LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) GENERATOR GRN/WHT WIRE HOT IN RUN OR START IGN FUSE JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) MAIN FUSIBLE LINK NCA WIRE RELAY BLOCK 2 (ON LEFT OF ENGINE COMPT, BEHIND BATTERY) STARTING CIRCUIT WHT BLK/YEL WIRE WHT WIRE YEL/GRN WIRE

+B FR- FL- 1 2 3 4 5 6 7 8 9 10 11 12 CDR+ CDL+ A/C, RADIO CONTROL SWITCH ANTB ANTA ANT BLK WIRE BLK/WHT WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BUS (-) BUS (+) CD AUTOMATIC CHANGER (RIGHT SIDE OF LUGGAGE COMPARTMENT) CDL+ GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/WHT WIRE GRY WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN ACC OR ON J/B 1 (BEHIND LEFT KICK PANEL) LEFT REAR SPEAKER LT GRN WIRE LT GRN/RED WIRE MUTE +B CDR- CDL- GND TXM- TXM+ MUTE BUS+ BUS- NCA WIRE PK/BK PNK WIRE POWER ANTENNA SYSTEM R - L - R+ L+ SGND MUTE R/B 2 (ON LEFT SIDE OF ENGINE COMPARTMENT, BEHIND BATTERY) RADIO FUSE 1 RADIO FUSE 2 RADIO/CD PLAYER RED WIRE RED/WHT WIRE RIGHT FRONT DOOR SPEAKER RIGHT REAR SPEAKER RR+ RL+ RR- WF+ WF- RL- SPEAKER RELAY STEREO POWER AMPLIFIER (RIGHT SIDE OF LUGGAGE COMPARTMENT) TELEPHONE TRANSCEIVER TELEPHONE TRANSCEIVER, SPEAKER RELAY (LEFT REAR CORNER OF LUGGAGE COMPARTMENT) TLMT TXM+ CDR+ CDL+ TXM- CDR- MUTE VIO WIRE VOL (-) VOLC PWR WHT WIRE WHT/GRN WIRE WOOFER SPEAKER LEFT FRONT DOOR SPEAKER YEL WIRE YEL/RED WIRE

BLK WIRE BLK/RED WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE CIG FUSE DOOR FUSE ECU-IG FUSE FUEL LID OPENER SOLENOID (AT RIGHT SIDE OF LUGGAGE COMPARTMENT) FUEL LID OPENER SWITCH HOT AT ALL TIMES HOT IN ACCY OR RUN J/B 1 (BEHIND LEFT KICK PANEL) J/B 3 (BEHIND CENTER OF DASH) LUGGAGE COMPARTMENT DOOR OPENER MOTOR (CENTER REAR OF TRUNK) LUGGAGE COMPARTMENT DOOR OPENER SWITCH THEFT DETERRENT, DOOR LOCK CONTROL ECU (BEHIND INSTRUMENT CLUSTER) TSW WHT/BLK WIRE WHT/RED WIRE

ACIS BRAIDED BLK WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRAIDED BRN WIRE CAMSHAFT POSITION SENSOR (LEFT FRONT OF ENGINE) CRANKSHAFT POSITION SENSOR (LEFT FRONT OF ENGINE) ENGINE CONTROL MODULE (BEHIND LOWER RIGHT SIDE OF DASH) EVG GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE 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 INSTRUMENT CLUSTER SYSTEM KNKR KNKL OCV- OCV+ KNOCK SENSOR 1 (TOP CENTER OF ENGINE) KNOCK SENSOR 2 (TOP CENTER OF ENGINE) LEFT CAMSHAFT TIMING OIL CONTROL VALVE (LEFT FRONT OF ENGINE) LEFT VVT SENSOR (TOP LEFT SIDE OF ENGINE) (LEFT CYLINDER HEAD) LT GRN WIRE MASS AIRFLOW METER (IN AIR INTAKE DUCT) NE- NE+ NOISE FILTER (LEFT REAR CORNER OF ENGINE) PNK WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT VVT SENSOR (TOP RIGHT SIDE OF ENGINE) THROTTLE CONTROL MOTOR (ON THROTTLE BODY) VC HTR HTL 1 2 PRG CL- VPA THA VVR- VVL- VSV (ACIS) (TOP REAR OF ENGINE) VSV (EVAP) (TOP REAR OF ENGINE) VTA THW VVR+ VVL+ WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE YEL/RED WIRE

3 4 5 6 7 8 9 10 PNK WIRE ACCEL POSITION SENSOR (TOP CENTER OF ENGINE) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BRAIDED BRN WIRE EFI FUSE EFI MAIN RELAY ENGINE COOLANT TEMPERATURE SENSOR (RIGHT FRONT TOP OF ENGINE) FPC GRN WIRE GRN/RED WIRE HOT AT ALL TIMES HTL HTR IGN FUSE IGNITION SWITCH INJECTOR 1 INJECTOR 2 (ENGINE HARN, RIGHT SIDE OF FIREWALL) INJECTOR 3 INJECTOR 4 INJECTOR 5 INJECTOR 6) INJECTOR 7 (-) INJECTOR 8 (-) JUNCTION BLOCK 1 ST FUSE LOCK ON LT GRN WIRE P/N PARK/NEUTRAL POSITION SWITCH (ON TRANSMISSION) PNK WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RELAY BLOCK 2 (ON LEFT SIDE OF ENGINE COMPT, BEHIND BATTERY) SHORT CONNECTOR (RIGHT SIDE OF DASH) STARTING/ CHARGING SYSTEM INSTRUMENT CLUSTER SYSTEM THROTTLE POSITION SENSOR (ON THROTTLE BODY) TRANSMISSION CONTROL SWITCH WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/RED WIRE

3 4 5 6 7 8 9 10 PNK WIRE ABS ECU (RIGHT SIDE OF DASH) BLK WIRE BLK/ WHT WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU RED/ WIRE BLU WIRE BLU/ WHT WIRE BLU/ YEL WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRAIDED BRN WIRE BRN/WHT 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 HOT IN ON OR START JUNCTION BLOCK 1 JUNCTION BLOCK 1 (BEHIND LEFT KICK PANEL) JUNCTION BLOCK 3 JUNCTION BLOCK 3 (BEHIND CENTER OF DASH) MALFUNCTION INDICATOR LIGHT PNK WIRE PWR RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE SNOW STOP FUSE OBD FUSE STOPLIGHT SWITCH (ON BRACKET, ABOVE BRAKE PEDAL) VAPOR PRESSURE SENSOR (UNDER RIGHT REAR OF VEHICLE, NEAR WHEELWELL) WHT WIRE WHT/ BLK WIRE WHT/ BLU WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL BLU/ WIRE YEL WIRE YEL/GRN 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