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

ALT FUSE ALT-S FUSE BATTERY BLK WIRE BLU WIRE BRN WIRE CHARGE INDICATOR COMBINATION METER COMPUTER DATA LINES SYSTEM D-IG FUSE DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) GENERATOR GRN WIRE HOT IN ON OR START IH (UNDER STEERING COLUMN) JUNCTION CONNECTOR 5 (IN ECU BOX) MPX PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PNK WIRE PNK/BLU WIRE RED WIRE RED/WHT WIRE RED/YEL WIRE WHT WIRE YEL WIRE

+5 IG 1 2 3 4 5 6 7 8 9 10 EC+ EC- GND 23 14 15 24 ECI- ECI+ EC+ EC- BLK WIRE BLK/ORG WIRE BLU WIRE BRN/WHT WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) DOOR LOCKS SYSTEM DRIVER DOOR ECU (IN DRIVER'S DOOR) EC MIRROR GRN WIRE GRN/RED WIRE HOT IN ON OR START IG (BEHIND CENTER OF DASH) IH (UNDER STEERING COLUMN) INNER MIRROR JUNCTION CONNECTOR 9, 10 (BEHIND TOP LEFT END OF DASH) LEFT REMOTE CONTROL MIRROR ORG/ WIRE P-IG FUSE PASSENGER DOOR ECU (IN RIGHT DOOR) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PNK WIRE RED WIRE RED/BLU WIRE RIGHT REMOTE CONTROL MIRROR RSSI DATA WHT WIRE WHT/BLK WIRE YEL WIRE

11 12 13 14 FSR+ FSR- BSW BGND 24 16 FSR- FSR+ AIR BAG SENSOR ASSEMBLY (UNDER FRONT OF CENTER CONSOLE) BLK WIRE BLK/RED WIRE BLU/ORG WIRE BLU/RED WIRE BLU/YEL WIRE BRN WIRE BUCKLE SWITCH BUZZER CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION METER COMPUTER DATA LINES SYSTEM CTY D-IG FUSE 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) FUSE GATEWAY ECU (BEHIND RIGHT SIDE OF DASH) GRN/BLK WIRE GRN/RED WIRE HOT AT ALL TIMES HOT IN ACC OR ON PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) HOT IN ON OR START IH (UNDER STEERING COLUMN) J/C 13 (BEHIND RIGHT SIDE OF DASH) J/C 17 (LEFT REAR OF LUGGAGE COMPT) LAPB LEFT BUCKLE SWITCH (IN LEFT FRONT SEAT BELT BUCKLE) LEFT DOOR COURTESY SWITCH LT GRN WIRE LT GRN/BLK WIRE MPX MPXB OCCUPANT CLASSIFICATION ECU (UNDER FRONT PASSENGER'S SEAT) OPEN DOOR IND ORG/ WIRE P-IG FUSE PBEW PBLT PNK/BLU WIRE POWER SUPPLY CIRCUIT RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT BUCKLE SWITCH (IN RIGHT FRONT SEAT BELT BUCKLE) SEAT BELT IND SPEEDOMETER TELLTALE LIGHT ASSEMBLY FRONT PASSENGER SEAT BELT WARNING LIGHT TRANSPONDER KEY COMPUTER (LEFT SIDE OF DASH, BEHIND GAUGE ASSEMBLY) UNLOCK WARNING SWITCH (BEHIND LEFT SIDE OF DASH) WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

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 QWR+ RMR- QWR- LMR- LMR+ RMR+ PNK WIRE A/C CONTROL ASSEMBLY (BEHIND CENTER OF DASH) BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/YEL WIRE BM (UNDER PASSENGER'S SEAT) BRN WIRE COMPUTER DATA LINES SYSTEM DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) FUSE GRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR START IGN IH (UNDER STEERING COLUMN) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) J/C 13 (BEHIND RIGHT SIDE OF DASH) J/C 18 (RIGHT REAR OF LUGGAGE COMPARTMENT) BQ LEFT LUGGAGE COMPARTMENT DOOR DRIVE MOTOR (AT LEFT SIDE OF LUGGAGE COMPT) LEFT ROOF DRIVE MOTOR (BELOW LEFT "C" PILLAR) LLR LCR LOR LPRB LLRE LCRE RPR LPRE RORE ROR LT GRN WIRE LT GRN/BLK WIRE MPX+ GND MPX- MPX-IG FUSE ORG/ WIRE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PNK WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE RIGHT LUGGAGE COMPARTMENT DOOR DRIVE MOTOR (AT RIGHT SIDE OF LUGGAGE COMPT) RIGHT QUARTER POWER WINDOW MOTOR (FRONT OF RIGHT QUARTER PANEL) RIGHT ROOF DRIVE MOTOR (BELOW RIGHT "C" PILLAR) SIG SGND RPRB RPRE LPR RHRE SLIDING ROOF CONTROL ECU (IN LEFT REAR OF LUGGAGE COMPT) SWE CLS VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE

1 2 3 4 5 6 10 11 21 GND DN UP CPUB SIG BDR LMT 1 2 3 4 5 6 10 11 21 GND DN UP CPUB SIG BDR LMT SGND PLS 2 5 8 9 14 15 16 19 20 21 22 23 25 27 29 30 AUTO 2 9 20 22 23 25 27 29 30 AUTO WLSW 4 13 20 KUL KL CPSE AUTO BL (UNDER DRIVER'S SEAT) BLK WIRE BLK/ WHT WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BRN WIRE BRN/WHT WIRE BZR CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMPUTER DATA LINES SYSTEM D DOOR FUSE DATA DDN DN AUTO UP AUTO DN MAN UP MAN DRIVER DOOR ECU (IN DRIVER'S DOOR) DUP FUSE GRN WIRE GRN/RED WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START IG RDA RSSI IH (UNDER STEERING COLUMN) JUNCTION CONNECTOR 13 (BEHIND RIGHT SIDE OF DASH) JUNCTION CONNECTOR 18 (RIGHT REAR OF LUGGAGE BQ COMPARTMENT) JUNCTION CONNECTOR 9, 10 (BEHIND TOP LEFT END OF DASH) LEFT DOOR COURTESY SWITCH LEFT POWER WINDOW MOTOR (IN LEFT DOOR) LMT LMT PLS LUGGAGE ROOM J/B (AT LEFT REAR CORNER OF LUGGAGE COMPT) ML WLSW MPX RCO GND MPX-IG FUSE MUL MUP MDN CTY PWE ORG/ WIRE P DOOR FUSE PASSENGER DOOR ECU (IN RIGHT DOOR) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PCT PLS PNK/BLU WIRE POWER WINDOW MASTER SWITCH PWS RADIO 2 FUSE RED WIRE RED/ BLU WIRE RED/BLU WIRE RED/WHT WIRE RIGHT DOOR COURTESY SWITCH RIGHT POWER WINDOW CONTROL SWITCH RIGHT POWER WINDOW MOTOR (IN RIGHT DOOR) RSSI SECURITY FUSE THEFT DETERRENT ECU (BEHIND LEFT END OF DASH) VIO WIRE VIO/WHT WIRE W/L WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE WIRELESS DOOR LOCK BUZZER WIRELESS DOOR LOCK CONTROL RECEIVER YEL WIRE YEL/BLK WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 IG BLK WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) STPI GRN WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) P-IG FUSE IG (BEHIND CENTER OF DASH) IH (UNDER STEERING COLUMN) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) KEY INTERLOCK SOLENOID (BEHIND LEFT SIDE OF DASH) KLS+ ORG/ WIRE RADIO 2 FUSE RED WIRE RED/BLU WIRE SHIFT LOCK CONTROL ECU (UNDER CENTER CONSOLE, NEAR SELECTOR LEVER) STOP FUSE STOP LIGHT SWITCH (ON TOP OF BRAKE PEDAL BRACKET) WHT WIRE WHT/BLK WIRE WHT/BLU WIRE

+B IGSW BATT CANH CANL +BM 13 12 STPI STPO 2 13 5 6 17 4 25 24 EC MREL 31 32 NE- NE+ 4 8 16 3 34 33 35 26 32 27 STP ACCELERATOR PEDAL POSITION SENSOR (BEHIND LEFT CENTER OF DASH) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/RED WIRE BRN WIRE CENTER J/B (BEHIND RIGHT CENTER CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION METER COMPUTER DATA LINES SYSTEM CRANKSHAFT POSITION SENSOR (ON LEFT FRONT OF ENGINE) D-IG FUSE DATA LINK CONNECTOR 3 (BEHIND LEFT SIDE OF DASH) DRIVER SIDE J/B (BEHIND DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU ECT PWR IND ECT SNOW IND ED (REAR OF LEFT FENDER) EFI FUSE EFI RELAY ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SWITCH PWR ENGINE CONTROL MODULE (ECM) (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) ENGINE ROOM R/B 1 ETCS FUSE (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN ON OR START IH (UNDER STEERING COLUMN) J/C 2 (IN ENGINE ROOM R/B 2) J/C 23, 24 (LEFT SIDE OF ENGINE COMPT) J/C 3 (IN ENGINE ROOM R/B 2) J/C 4, 5 (IN ECU BOX) J/C 5 (IN ECU BOX) LT BLU WIRE MIL IND MPX MPXB NCA WIRE OF DASH) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU (RIGHT SIDE KICK PANEL) PNK WIRE PNK/BLK WIRE POWER SUPPLY CIRCUIT PWR RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE SNOW SPEEDOMETER STOP FUSE STOP LIGHT SWITCH (ON TOP OF TAC TACH TC EPA VPA VCPA TACHOMETER WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

13 2 MPX- MPX+ 26 25 LCT LCTE 5 7 MPX-B BL (UNDER DRIVER'S SEAT) BP BLK WIRE BLU/YEL WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) CNCL COMPUTER DATA LINES SYSTEM DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU FUEL OPN FUSE FUSE GRN/BLK WIRE GRN/RED WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES IG (LEFT SIDE OF STEERING COLUMN) IH (UNDER STEERING COLUMN) II (ON LEFT SIDE DASH BRACE) J/C 17 (LEFT REAR OF LUGGAGE COMPARTMENT) L-O/C (P) LCTY LCM+ 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 P-GND PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) RED WIRE SLIDING ROOF CONTROL ECU (IN LEFT REAR OF LUGGAGE COMPT) TSW VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE