Lexus SC II facelift (2005-2010) ih (under steering column) Wiring diagrams

1 2 3 4 5 +B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 CPUB 5 4 3 2 1 GND TXCT RXCK CODE +B 7 15 16 HRLY 7 6 IMO IMI AIR BAG BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLU WIRE BLU/ WHT WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) CNCL CODE RXCK TXCT AGND GND COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM INTERIOR LIGHTS SYSTEM CRA RELAY DATA DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) ED (REAR OF LEFT FENDER) EFIO EFII ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) ENGINE ROOM 2 R/B (ON LEFT SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) EXTERIOR ROOM 2 R/B) LIGHTS SYSTEM FRONT CONTROLLER GRN BLK/ WIRE GRN WIRE GRN/ YEL WIRE GRY WIRE HDCY HEAD LP RELAY HEADLIGHTS SYSTEM HORN FUSE HORN RELAY HORN RLY HORNS SYSTEM HOT AT ALL TIMES HOT IN ON OR START IG (25-28 NOT USED) 29 30 31 32 33 RDA RSSI IGN FUSE IH (UNDER STEERING COLUMN) IND BZR JUNCTION CONNECTOR 2 (IN ENGINE JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) LT GRN WIRE LT GRN/BLK WIRE MAIN FUSE MAIN LUGGAGE COMPARTMENT DOOR OPENER SWITCH MPX ORG/ WIRE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU (RIGHT SIDE KICK PANEL) PNK WIRE PNK/BLU WIRE RCO (16-19 NOT USED) 20 21 22 23 24 GND RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RSSI 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 UNLOCK WARNING SWITCH (BEHIND LEFT SIDE OF DASH) VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WIRELESS DOOR LOCK BUZZER (LEFT REAR OF SECURITY ENGINE COMPT) INDICATOR LIGHT WIRELESS DOOR LOCK CONTROL RECEIVER YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 REOS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 IG A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) A/C ROOM TEMPERATURE SENSOR (BEHIND CENTER OF DASH) A/C THERMISTOR (BEHIND CENTER OF DASH) AIF AOF AMHPA AMHDR SG-4 AIR AOD AMCPA AMCDR BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLOWER MOTOR (BEHIND LOWER RIGHT SIDE OF DASH) BLOWER MOTOR CONTROLLER (BEHIND RIGHT SIDE OF DASH) SI +B GND M+ M- BLU WIRE BLU/RED WIRE BLU/WHT WIRE CLOSE COMPUTER DATA LINES SYSTEM DGS TSPA TR TPDR DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) ENGINE ROOM 1 R/B (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) EXHAUST GAS SENSOR (AT LEFT FRONT OF ENGINE COMPT) FAN FUSE FAN-2 FUSE GAS GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HAZD SG-1 TSDR TE SG-2 HEATER FUSE HOT AT ALL TIMES HOT IN ON OR START IH (UNDER STEERING COLUMN) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) JUNCTION CONNECTOR 14 (BEHIND RIGHT SIDE OF DASH) LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MPX+ GND MPX-IG FUSE MULTI-DISPLAY NAVIGATION DOOR, TILT CONTROL SWITCH OPEN CLS SWE BLW PNK WIRE OPEN OPEN ORG/ WIRE PNK EMOP WIRE PNK WIRE POWER TOPS SYSTEM RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE SG-3 TILT TPO TPPA MPX- TSL TSR VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE

+BM 1 2 3 4 5 6 22 23 28 29 M- M+ 2 4 5 6 8 13 17 EC BATT 3 4 26 27 31 32 33 34 35 TC STP ACCEL PEDAL POSITION SENSOR (BEHIND LEFT CENTER OF DASH) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BRN WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION METER COMPT, IN ECU BOX) COMPUTER DATA LINES SYSTEM CRUISE CRUISE CONTROL SWITCH (COMBINATION SWITCH) CRUISE IND DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) STPI EB (RIGHT SIDE OF CYLINDER HEAD) EC (LEFT SIDE OF CYLINDER HEAD) ECC RES/ ED (REAR OF LEFT FENDER) ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE ENGINE ROOM 2 R/B (ON LEFT EFI RELAY 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 DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) D-IG FUSE IH (UNDER STEERING COLUMN) JUNCTION CONN- ECTOR 2 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR JUNCTION CONNECTOR 2 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 4, 5 (IN ECU BOX) JUNCTION CONNECTORS 5 (IN ECU BOX) MREL IGSW NCA WIRE PARK/ NEUTRAL POSITION SWITCH (ON TRANSMISSION) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PNK WIRE PNK/BLK WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE SET/ COAST SG TC SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) SKID CONTROL ECU (BEHIND LEFT END OF DASH) SPEEDOMETER STOP LIGHT SWITCH (ON TOP OF BRAKE PEDAL BRACKET) THROTTLE BODY ASSEMBLY VEHICLE SPEED SENSOR (ELECTRONICALLY CONTROLLED TRANSMISSION) (ON TRANSMISSION) VIO WIRE VPA EPA VCPA WHT WIRE WHT/BLK WIRE YEL RED/ WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

12 7 TS SIL 14 21 16 22 SOL+ SOL- 23 14 25 16 17 PNK WIRE 4 12 17 9 8 6 D/G TS +BI +BO TRIG 7 8 SS+ SS- ABS IG FUSE AFS ECU (LEFT END OF DASH) BLK WIRE BLK/ORG WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION METER DATA LINK CONNECTOR (DLC) 3 (BEHIND LEFT SIDE OF DASH) ED (REAR OF LEFT FENDER) EE (REAR OF LEFT FENDER) ESS BAT TRIG FLO FUSE GRN WIRE HOT AT ALL TIMES PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) HOT IN ON OR START DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) IH (UNDER STEERING COLUMN) JUNCTION CONNECTOR 13 (BEHIND RIGHT SIDE OF DASH) JUNCTION CONNECTOR 9, 10 (BEHIND TOP LEFT END OF DASH) LT GRN WIRE MPX PNK WIRE PPS SOLENOID (AT RIGHT FRONT OF ENGINE) RED WIRE SKID CONTROL ECU (BEHIND LEFT END OF DASH) SPDL STEERING SENSOR (ON STEERING COLUMN) VIO WIRE WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL/RED WIRE

A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) BDR BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/YEL WIRE BLU/ORG WIRE BLU/YEL WIRE BQ (AT RIGHT QUARTERPANEL) COMPUTER DATA LINES SYSTEM CPUB DRIVER DOOR ECU (IN DRIVER'S DOOR) DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) FUSE GRN/YEL WIRE HOT AT ALL TIMES HOT IN ON OR START HTR IH (UNDER STEERING COLUMN) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) J/C 18 (RIGHT REAR OF (UNDER DRIVER'S SEAT) BL LUGGAGE COMPT) LEFT REMOTE CONTROL MIRROR LUGGAGE ROOM J/B (AT LEFT REAR CORNER OF LUGGAGE COMPT) MIRROR HEATER MPX MPX-IG FUSE ORG/ WIRE P DOOR FUSE PASSENGER DOOR ECU (IN RIGHT DOOR) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) RADIO 2 FUSE RED/BLU WIRE RED/WHT WIRE RIGHT REMOTE CONTROL MIRROR SIG VIO/BLU WIRE VIO/WHT WIRE WHT/BLK WIRE WHT/BLU WIRE

1 2 10 12 14 7 18 17 3 4 13 24 5 6 21 IG 10 8 CANL CANH 10 9 ATX+ ATX- 13 2 10 MPX- MPX+ BUBS 13 33 MPX 24 25 CANL CANH 6 3 PNK TXS- TXS+ WIRE 7 14 6 SIL CANL CANH A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) AFS ECU (LEFT END OF DASH) AIR AIR BAG SENSOR ASSEMBLY (UNDER FRONT OF CENTER CONSOLE) BAG BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/ORG WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION METER COMBINATION SWITCH DATA LINK CONNECTOR (DLC) 3 (BEHIND LEFT SIDE OF DASH) DRIVER DOOR ECU (IN DRIVER'S DOOR) DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) DRIVER'S POWER SEAT ECU (UNDER DRIVER'S SEAT) ENGINE ROOM 2 R/B (ON LEFT SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) FRONT CONTROLLER FRONT PASSENGER'S POWER SEAT ECU (UNDER DRIVER'S SEAT) FUSE GATEWAY ECU (BEHIND RIGHT SIDE OF DASH) GRN WIRE GTX+ GTX- PNK WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN OR OR START IG (BEHIND CENTER OF DASH) IH (UNDER STEERING COLUMN) J/C 13 (BEHIND RIGHT SIDE OF DASH) JUNCTION CONNECTOR 25 LT GRN WIRE LUGGAGE ROOM J/B ECU (AT LEFT REAR CORNER OF LUGGAGE COMPT) MPX MPX-IG FUSE MULTI-DISPLAY OF LUGGAGE COMPT) ORG/ WIRE PASSENGER DOOR ECU (IN RIGHT DOOR) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU PNK/BLU WIRE RADIO 2 FUSE RADIO, PLAYER RED WIRE RED/BLU WIRE RED/WHT WIRE SIL SKID CONTROL ECU (BEHIND LEFT END OF DASH) SLIDING ROOF CONTROL ECU (IN LEFT REAR 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) VIO WIRE VIO/WHT WIRE W/ NAVIGATION WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

+SM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 S/S +2 1 2 3 4 5 6 7 8 9 10 BACK PBIL A/C CONTROL ASSEMBLY (BEHIND CENTER AIR BAG WIP 2 3 4 5 6 7 8 9 10 AIR CONDITIONING SYSTEM BKLL BLK WIRE BLU WIRE BLU/RED WIRE DRIVER SIDE J/B ECU CIRCUIT FSPT SNOW PWR FUSE GRN WIRE GRN/RED WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN ON OR START HOT IN ON OR START DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) WIPER FUSE IG (LEFT SIDE OF STEERING COLUMN) IGNITION SWITCH IH (UNDER STEERING COLUMN) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) LOCK OFF MPX MPX-B MPX-IG MPX-IG FUSE NAVIGATION SYSTEM WARNING SYSTEM OF DASH) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU (RIGHT SIDE KICK PANEL) PASSIVE RESTRAINT SYSTEM RED WIRE RED/WHT WIRE RUN WIRE SUPPLEMENTAL RESTRAINTS SYSTEM TRANSMISSIONS SYSTEM VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE WIPER/WASHER SYSTEM YEL WIRE YEL/RED WIRE

A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) BLK WIRE BLK/ORG WIRE BLU WIRE BN (AT LEFT QUARTERPANEL) COMPUTER DATA LINES SYSTEM DEF DEFOG FUSE DEFOG RELAY DOME FUSE HOT AT ALL TIMES HOT IN ACC OR ON IH (UNDER STEERING COLUMN) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) LUGGAGE ROOM J/B (AT LEFT REAR CORNER OF LUGGAGE COMPT) LUGGAGE ROOM J/B ECU (AT LEFT MPX+ MPX- MPX- MPX+ REAR CORNER OF LUGGAGE COMPT) NOISE FILTER (REAR WINDOW DEFOGGER) (AT LEFT FRONT CORNER OF LUGGAGE COMPT) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) RADIO 2 FUSE REAR WINDOW DEFOGGER (IN REAR WINDOW) RED WIRE VIO WIRE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE

ACCEL POSITION SENSOR (BEHIND LEFT CENTER OF DASH) ACMG VPMP AIR CONDITIONING SYSTEM AIR CONDITIONING SYSTEM COOLING FANS SYSTEM BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE CANL CANH CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION METER COMPUTER DATA LINES SYSTEM DATA LINK CONNECTOR 3 (BEHIND LEFT SIDE OF DASH) ECT PWR IND ECT SNOW IND ENGINE CONTROL MODULE (ECM) (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HP RFC IGSW TAM IH (UNDER STEERING COLUMN) LT BLU WIRE LT GRN WIRE MIL IND MPXB ORG/ BLU WIRE ORG/ WIRE PNK WIRE PNK/BLK WIRE POWER SUPPLY CIRCUIT PPNP RED WIRE RED/BLK WIRE RED/YEL WIRE SKID CONTROL ECU (BEHIND LEFT END OF DASH) SPEEDOMETER STA MREL FC FPR STPI TAC TACH TACHOMETER TC STP MPMP IMI IMO VIO WIRE VPA EPA VCPA WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE

B+ B- BLK WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE CANISTER PRESSURE SENSOR CANISTER PUMP MODULE (REAR OF VEHICLE CHASSIS) EB (RIGHT SIDE OF CYLINDER HEAD) EC (LEFT SIDE OF CYLINDER HEAD) GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE IH (UNDER STEERING COLUMN) J/C 24 (LEFT SIDE OF ENGINE COMPT) J/C 4 (IN ECU BOX) J/C 4, 5 (IN ECU BOX) LEAK DETECTION PUMP LEVEL TEMP LT GRN WIRE NCA WIRE ORG/ WIRE P/N SGND VCC VOUT VENT VALVE WHT WIRE WHT/BLK WIRE YEL/BLK WIRE