Lexus SC II (2001-2005) computer data lines system Wiring diagrams

+B IGSW BATT +BM SIL 13 12 STPI STPO 2 13 5 6 17 4 7 26 EC MREL ACCELERATOR POSITION SENSOR (BEHIND LEFT CENTER OF DASH) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/ORG WIRE BLU/RED WIRE BRN WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION METER COMPUTER DATA LINES SYSTEM D-IG FUSE DATA LINK CONNECTOR 3 (BELOW LEFT SIDE OF DASH) DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU (LEFT END OF DASH) ECT PWR. ECT SNOW ED (LEFT FRONT FENDER) EFI FUSE EFI RELAY ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SWITCH ENGINE CONTROL MODULE (ECM) (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) ENGINE CONTROLS SYSTEM ENGINE ROOM R/B 1 (RIGHT SIDE COMPT, BEHIND OF ENGINE STRUT TOWER) ENGINE ROOM R/B 2 (LEFT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) IGN FUSE ETCS FUSE 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 13 (BEHIND RIGHT SIDE OF DASH) J/C 2 (IN ENGINE ROOM R/B 2) J/C 3 (IN ENGINE ROOM R/B 2) J/C 4, J/C 5 (IN ECU BOX) J/C 9 (BEHIND TOP LEFT END OF DASH) LT GRN/BLK WIRE MPX PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU (RIGHT SIDE KICK PANEL) PNK/BLK WIRE PWR RED WIRE RED/BLK WIRE RED/YEL WIRE SIL SNOW SPEEDO STOP FUSE STOPLIGHT SWITCH (TOP OF BRAKE PEDAL BRACKET) TAC TACH TACH TC WFSE EPA VPA VCPA EPTK VPTK WHT WIRE WHT/BLK WIRE WSFE YEL WIRE

ALT FUSIBLE LINK ALT-S FUSE BATTERY BATTERY GROUND BLK WIRE BLU WIRE BLU/ORG 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 COMPARTMENT, IN ECU BOX) ENGINE ROOM 1 R/B (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) GENERATOR GRN WIRE HOT IN ON OR START IH (UNDER STEERING COLUMN) JUNCTION CONNECTOR 4, JUNCTION CONNECTOR 5 (IN ECU BOX) MPX NCA WIRE ORG/ WIRE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) RED WIRE RED/YEL WIRE WHT WIRE YEL WIRE

BL (UNDER DRIVER'S SEAT) BLK WIRE BLU/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 HOT AT ALL TIMES II (ON LEFT SIDE DASH BRACE) BP (AT LEFT QUARTERPANEL) JC-17 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

1 2 14 FSR+ FSR- RBE+ AIR BAG SENSOR ASSEMBLY (AT CENTER OF DASH, BELOW RADIO) BL (UNDER DRIVER'S SEAT) BLK WIRE BLK/RED WIRE BLU/ORG WIRE BLU/RED WIRE BLU/YEL WIRE BQ (AT RIGHT QUARTERPANEL) BRN WIRE 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) FRONT PASSENGER SEAT BELT WARNING LIGHT FUSE GATEWAY ECU (BEHIND RIGHT SIDE OF DASH) GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRY WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START IH (UNDER STEERING COLUMN) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) J/C 13 (BEHIND RIGHT SIDE OF DASH) J/C 9, 10 (BEHIND TOP LEFT END OF DASH) JC-18 JC-20 LEFT BUCKLE SWITCH (IN LEFT FRONT SEAT BELT BUCKLE) LEFT DOOR COURTESY SWITCH LT GRN/BLK WIRE MPX OPEN DOOR INDICATOR ORG/ WIRE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PBLT PNK/BLU WIRE RADIO 2 FUSE RED WIRE RED/BLU WIRE RED/WHT WIRE RIGHT BUCKLE SWITCH, OCCUPANT DETECTION SENSOR SEAT BELT INDICATOR TRANSPONDER KEY COMPUTER (LEFT SIDE OF DASH, BEHIND GAUGE ASSEMBLY) UNLOCK WARNING SWITCH WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 RCL- RCL+ SLD- SLD+ LFT- LFT+ GND +B FRV- FRV+ BLK WIRE BLK/RED WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BM (UNDER PASSENGER'S SEAT) BRN WIRE COMPUTER DATA LINES SYSTEM FDWN FUP GRN WIRE GRY WIRE HOT AT ALL TIMES J/C 22 JC-21 LDWN LT GRN WIRE LUP ORG/ WIRE P-P/SEAT FUSE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER'S LUMBAR SUPPORT CONROL SWITCH PASSENGER'S POWER SEAT ECU (UNDER PASSENGER'S SEAT) PASSENGER'S SEAT FRONT VERTICAL CONTROL SENSOR PASSENGER'S SEAT FRONT VERTICAL MOTOR PASSENGER'S SEAT LIFTER CONTROL SENSOR PASSENGER'S SEAT LIFTER MOTOR PASSENGER'S SEAT LUMBAR SUPPORT CONTROL MOTOR PASSENGER'S SEAT RECLINING CONTROL SENSOR PASSENGER'S SEAT RECLINING MOTOR PASSENGER'S SEAT SLIDE CONTROL SENSOR PASSENGER'S SEAT SLIDE MOTOR PASSENGERS POWER SEAT CONTROL SWITCH PNK/BLK WIRE PNK/BLU WIRE RCLF RCLF RCLR RCLR RED WIRE SGND SSRS SLDF SLDR LUP LDWN FUP SLDF SLDR SSFV SSRV SSRR PVCC FDWN SYSB VIO WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 AUI+ AUO+ 1 2 3 4 5 6 7 8 9 10 11 12 SP+ AUI+ 1 2 3 4 5 6 7 8 9 10 VR 15 5 TX- TX+ 18 5 13 19 6 9 15 2 PNK MTX- MTX+ SPD TDX- TDX+ N-MU TFL- TFL+ WIRE 3 6 TXS+ TXS- PNK WIRE 9 10 ATX- ATX+ AIR CONDITIONING SYSTEM AUO- BLK WIRE BLU WIRE BLU/ORG WIRE BLU/RED WIRE BO (NEAR STEREO COMPONENT AMPLIFIER) BQ (AT RIGHT QUARTERPANEL) BRN WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMPUTER DATA LINES SYSTEM DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) ENGINE ROOM 2 GRN WIRE GRN/RED WIRE GRY WIRE HOT AT ALL TIMES HOT IN HOT IN ON OR ACC HOT IN ON OR START IG (LEFT SIDE OF STEERING COLUMN) IH (UNDER STEERING COLUMN) INSTRUMENT CLUSTER SYSTEM INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) J/C 12 (BEHIND RIGHT SIDE OF DASH) J/C 15 J/C 9, 10 (BEHIND TOP LEFT END OF DASH) JC-18 LEFT DOOR SPEAKER (SQUAWKER, TWEETER) LT GRN WIRE LT GRN/BLK WIRE MULTI-DISPLAY NAVI +B SP- AUI- GND NAV- NAV+ NAVO NAVIGATION AMPLIFIER (AT RIGHT REAR CORNER OF LUGGAGE COMPARTMENT) NAVIGATION ECU (AT RIGHT REAR CORNER OF LUGGAGE COMPT) NCA WIRE ORG/ WIRE P-IG FUSE PARKING BRAKE SWITCH (BEHIND LEFT SIDE OF DASH) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU PKB VG PNK OPN WIRE PNK TX- WIRE PNK/BLK WIRE R/B (ON LEFT SIDE OF ENGINE COMPARTMENT, FORWARD OF STRUT TOWER) RADIO 2 FUSE RADIO, PLAYER RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE REV STARTER FUSE STEREO COMPONENT AMPLIFIER (AT RIGHT REAR CORNER OF LUGGAGE COMPT) SYNC SYNC TX- TC SPD VR TILT TV FUSE TX+ VG VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE YEL/RED 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 BQ (AT RIGHT QUARTER- PANEL) 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 ENGINE ROOM 1 R/B (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) 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 J/C 9, J/C 10 (BEHIND TOP LEFT END OF DASH) JC-18 JUNCTION CONNECTOR 13 (BEHIND RIGHT SIDE OF DASH) LEFT DOOR COURTESY SWITCH LEFT DOOR KEY LOCK/ UNLOCK SWITCH LEFT POWER WINDOW MOTOR LMT LMT PLS LUGGAGE ROOM J/B (AT LEFT REAR CORNER OF LUGGAGE COMPARTMENT) 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 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 (ON CENTER OF ROOF HEADER) YEL WIRE YEL/BLK WIRE YEL/RED 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 BP (AT LEFT QUARTERPANEL) 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 JC-17 LCTY LEFT QUARTER POWER WINDOW MOTOR 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) 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) LIMIT SWITCH (TONNEAU COVER) 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 COMPT DOOR DETECTION SWITCH 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+ 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) BQ (AT RIGHT QUARTERPANEL) BRN WIRE COMPUTER DATA LINES SYSTEM DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) FUSE GND MPX- MPX+ 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) JC-18 LEFT LUGGAGE COMPARTMENT DOOR DRIVE MOTOR (AT LEFT SIDE OF LUGGAGE COMPT) LEFT ROOF DRIVE MOTOR (BELOW LEFT "C" PILLAR) LLR LCR ES LOR LPRB LLRE LCRE RPR LPRE RORE ROR LT GRN WIRE LT GRN/BLK WIRE 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 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

13 2 MPX- MPX+ 26 25 LCT LCTE 5 7 MPX-B BL (UNDER DRIVER'S SEAT) BP (AT LEFT QUARTERPANEL) BLK WIRE BLU/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/RED 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) JC-17 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