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

+BI RL+ RL- RR+ RR- 1 2 3 4 5 6 7 8 9 10 VGS 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 CSW 12 13 14 15 16 17 18 19 20 21 22 23 24 TS 7 8 SS+ SS- ABS IG FUSE ABS IND. AFS ECU (LEFT END OF DASH) BLK WIRE BLK/ORG WIRE BLK/WHT WIRE BLU WIRE BLU/ORG WIRE BRAKE IND BRN WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION METER COMPUTER DATA LINES SYSTEM D/G DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) ENGINE ROOM 2 R/B (ON LEFT SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) FLO FUSE GGND GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/WHT WIRE GYAW HOT AT ALL TIMES HOT IN ON OR START HOT IN ON OR START DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) D-IG FUSE HOT IN RUN OR START IGN FUSE IH (UNDER JUNCTION CONNECTOR 13 (BEHIND RIGHT SIDE OF DASH) JUNCTION CONNECTOR 2 (IN ENGINE ROOM 2 R/B) LEFT REAR ABS SPEED SENSOR (AT LEFT REAR WHEEL ASSEMBLY) LT BLU WIRE LT GRN WIRE MPX NCA WIRE ORG/ WIRE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PNK WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE RIGHT REAR ABS SPEED SENSOR (AT RIGHT REAR WHEEL ASSEMBLY) SKID CONTROL ECU (BEHIND LEFT END OF DASH) SPDL STEERING SENSOR (ON STEERING COLUMN) STOP FUSE STOP LIGHT SWITCH (ON TOP OF BRAKE PEDAL BRACKET) TRIG TRIG +BO STP VIO WIRE VSC OFF IND SLIP IND VSC OFF SWITCH VSC WARNING BUZZER (BEHIND LEFT SIDE OF DASH) VYS WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YAW - YAW RATE SENSOR (UNDER REAR OF CENTER CONSOLE) YEL WIRE YEL/RED WIRE YSS YD

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 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

1 3 VZ GND 3 1 VZ (GND) GND (VZ) 3 1 VZ GND 5 6 7 PT MCOOL MHOT A/C AMBIENT TEMPERATURE SENSOR (AT CENTER OF FRONT BUMPER, BEHIND GRILLE) A/C COMP RELAY A/C FUSE A/C MAGNETIC CLUTCH, LOCK SENSOR (ON A/C COMPRESSOR) ACMG AIR BAG AIR INLET CONTROL SERVO MOTOR (BEHIND RIGHT SIDE OF DASH) AIR MIX CONTROL SERVO MOTOR (DRIVER SIDE) (BEHIND LEFT CENTER SIDE OF DASH) AIR MIX CONTROL SERVO MOTOR (PASSENGER SIDE) (BEHIND RIGHT CENTER SIDE OF DASH) AIR VENT MODE SERVO MOTOR (BEHIND CENTER OF DASH) 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/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) IF DUAL EC (LEFT SIDE OF CYLINDER HEAD) ED (REAR OF LEFT FENDER) ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) ENGINE COOLANT TEMPERATURE SENSOR (ON TOP RIGHT SIDE OF ENGINE) FAN RELAY GND(S) GND(M) GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT IN ACC OR ON PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) RADIO 2 FUSE HTR RELAY II (ON LEFT SIDE DASH BRACE) JUNCTION CONNECTOR 1 JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 4 (IN ECU BOX) JUNCTION CONNECTOR 8 (BEHIND LEFT END OF DASH) LCKI MPOS 1 MPOS 2 MPOS 6 MPX ORG/ WIRE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PRESSURE SWITCH (AT UPPER LEFT RADIATOR SUPPORT) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RFC SINGLE TAM VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL 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

15 7 5 8 6 12 TAIL-RLY FMIG 5 13 2 10 12 1 SG MPX- MPX+ BUBS BL (UNDER DRIVER'S SEAT) BLK WIRE BLK/RED WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BP (AT LEFT QUARTERPANEL) CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION SWITCH COMPUTER DATA LINES SYSTEM CRA RELAY DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) ENGINE ROOM 1 R/B (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) FRONT CONTROLLER GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HIGH MOUNTED STOP LIGHT HOT AT ALL TIMES HOT AT ALL TIMES PASSENGER SIDE J/B (BEHIND FUSE RIGHT KICK PANEL) HOT IN ON OR START IG (LEFT SIDE OF STEERING COLUMN) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER JUNCTION CONNECTOR JUNCTION CONNECTOR 1 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 14 (BEHIND RIGHT SIDE OF DASH) JUNCTION CONNECTOR 17 (LEFT REAR OF LUGGAGE COMPT) JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) LCE LP FUSE LEFT FRONT PARKING LIGHT RIGHT FRONT SIDE MARKER LIGHT LEFT FRONT SIDE MARKER LIGHT LEFT REAR COMBINATION LIGHT LEFT REAR SIDE MARKER LIGHT LEFT STOP LICENSE PLATE LIGHT LIGHT LT GRN/BLK WIRE LUGGAGE ROOM J/B ECU LUGGAGE ROOM J/B ECU (AT LEFT REAR CORNER OF LUGGAGE COMPT) MPX-IG FUSE OF DASH) P-GND RED WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT PARKING LIGHT RIGHT REAR COMBINATION LIGHT RIGHT REAR SIDE MARKER LIGHT RIGHT STOP RR J/B FUSE TAIL FUSE TAIL- LIGHT TURN SIGNAL TURN SIGNAL TAIL LIGHT VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL 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

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