Lexus SC II facelift (2005-2010) computer data lines system 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

BL (UNDER DRIVER'S SEAT) BLK WIRE BLU/ORG WIRE BLU/WHT WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU FUEL FUEL LID OPENER MOTOR (AT LEFT SIDE OF LUGGAGE COMPT) FUEL LID OPENER SWITCH FUEL OPN (0) FUEL OPN (P) FUEL OPN FUSE FUSE GRN/BLK WIRE GRN/YEL WIRE HOT AT ALL TIMES II (ON LEFT SIDE DASH BRACE) J/C 17 (LEFT REAR OF LUGGAGE COMPARTMENT) LUGGAGE ROOM J/B (AT LEFT REAR CORNER OF LUGGAGE COMPT) LUGGAGE ROOM J/B ECU MPX MPX-B P-GND PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) RED WIRE WHT/BLK WIRE WHT/BLU WIRE

AIR BAG AIR BAG SENSOR ASSEMBLY (AT CENTER OF DASH, BELOW RADIO) BP (AT LEFT QUARTERPANEL) COMPUTER DATA LINES SYSTEM D-IG FUSE DBKL DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) BKLR HOT IN ON OR START J/C 17 (LEFT REAR OF LUGGAGE COMPT) LEFT BUCKLE SWITCH (IN LEFT FRONT SEAT BELT BUCKLE) LEFT TENSION REDUCER SOLENOID (AT BASE OF LEFT "B" PILLAR) PASSENGER SIDE J/B (RIGHT SIDE KICK PANEL) PASSENGER SIDE J/B ECU BKLL PNK/BLU WIRE RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT BUCKLE SWITCH (IN RIGHT FRONT SEAT BELT BUCKLE) RIGHT TENSION REDUCER SOLENOID (AT BASE OF RIGHT "B" PILLAR) WHT WIRE WHT/BLK WIRE

1 4 5 6 GND CPUB SIG BDR 18 10 MUL 2 13 MPX+ MPX- 25 26 LCTE LCT 3 4 13 6 5 20 LSW KUL KL A+ A- CPSE 3 5 6 20 LSW A- A+ CPSE 4 8 LCTY LCM+ 8 19 20 22 27 29 30 ML MUL 8 9 19 21 22 27 28 30 ML WLSW MUL PWS BL (UNDER DRIVER'S SEAT) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM CTY DLE PNK WIRE CTY PWE D DOOR FUSE 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) FUSE GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) MPX-IG FUSE ILL INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) LEFT DOOR COURTESY SWITCH LEFT DOOR LOCK CONTROL SWITCH (POWER WINDOW MASTER SWITCH) LUGGAGE ROOM J/B (AT LEFT REAR CORNER OF LUGGAGE COMPT) LUGGAGE ROOM J/B ECU (AT LEFT REAR CORNER OF LUGGAGE COMPT) ORG/ WIRE P DOOR FUSE PASSENGER DOOR ECU (IN RIGHT DOOR) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PNK WIRE RADIO 2 FUSE RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT DOOR COURTESY SWITCH RIGHT DOOR LOCK CONTROL SWITCH RIGHT DOOR LOCK MOTOR, DOOR UNLOCK DETECTION SWITCH (IN RIGHT FRONT DOOR) SECURITY FUSE SLIDING ROOF CONTROL ECU (IN LEFT REAR OF LUGGAGE COMPT) TAIL FUSE VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE YEL/BLK 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 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 OPEN 1 2 3 4 5 6 7 8 9 10 11 12 13 BRFR BRFL BLGR LFR+ RLM+ BLGL BPT CPUB 1 2 3 4 5 6 7 8 9 10 LML+ RML+ PTM+ LFL+ LML- RML- QWL- QWL+ PTM- LFL- 13 2 MPX- MPX+ BLK 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/YEL WIRE COMPUTER DATA LINES SYSTEM GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES J/C 17 (LEFT REAR OF LUGGAGE COMPARTMENT) LCTY LEFT QUARTER POWER WINDOW MOTOR (FRONT OF LEFT QUARTER PANEL) LFR- RLM- LGG LH FUSE LGG RH FUSE LIMIT SWITCH (LEFT LUGGAGE FRONT LOCK) (AT LEFT REAR SIDE OF LUGGAGE COMPT) LIMIT SWITCH (PACKAGE TRAY 1) (NEAR LEFT SIDE OF PACKAGE TRAY) 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) (IN FRONT OF LEFT REAR WHEEL) LIMIT SWITCH (TONNEAU COVER) (FRONT OF LUGGAGE COMPARTMENT) LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE 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 COMPARTMENT DOOR DETECTION SWITCH (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) P-TRAY FUSE PACKAGE TRAY MOTOR (BELOW CENTER OF PACKAGE TRAY) PNK WIRE PNK/BLK WIRE RCL LPLB RCRE RPL RHL LLL LPLE RLLE SWE TCSE PTPE RCLE RPLE RHLE LLLE LCTE LCT RED WIRE RED/BLK WIRE RED/BLU WIRE ROOF LH FUSE ROOF LOCK MOTOR (AT FRONT OF ROOF) ROOF RH FUSE RPLB RCR LPL RLL CLS TCS PNK WIRE SLIDING ROOF CONTROL ECU (IN LEFT REAR OF LUGGAGE COMPT) VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED 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

+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