Lexus SC II (2001-2005) 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 ABS IG FUSE ABS IND. 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 (BEHIND LEFT KICK PANEL) D-IG FUSE 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 HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT IN ON OR START HOT IN RUN OR START IGN FUSE 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 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) STEERING SENSOR (ON STEERING COLUMN) STOP FUSE STOPLIGHT SWITCH (ON TOP OF BRAKE PEDAL BRACKET) TRIG TRIG +BO STP VIO WIRE VSC IND VSC OFF IND SLIP IND VSC OFF SWITCH VSC WARNING BUZZER (BEHIND LEFT SIDE OF DASH) VYS WHT WIRE WHT/BLK WIRE WHT/RED WIRE YAW - YAW RATE SENSOR (UNDER REAR OF CENTER CONSOLE) YEL WIRE YEL/RED WIRE YSS YD

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 REOS TELIN 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/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE 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 GRN WIRE LT GRN/BLK WIRE MPX+ GND MPX-IG FUSE MULTI-DISPLAY OPEN CLS SWE BLW OPN 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 TELEPHONE COMPUTER (CENTER REAR OF LUGGAGE COMPARTMENT) TILT TPO TPPA MPX- TSL TSR VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

1 3 VZ GND 3 1 VZ (GND) GND (VZ) 3 1 VZ GND 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) EC (LEFT SIDE OF CYLINDER ED (REAR OF LEFT FENDER) ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) ETAM 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 HEAD HOT AT ALL TIMES HOT IN ACC OR ON HTR RELAY IF (AT LEFT KICK PANEL) II (ON LEFT SIDE DASH BRACE) JUNCTION CONNECTOR 14 JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 7 (IN ECU BOX) JUNCTION CONNECTOR 8 (BEHIND LEFT END OF DASH) LCKI MCOOL MHOT MPOS 1 MPOS 2 MPOS 6 MPX ORG/ WIRE PASSENGER SIDE J/B PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PRE RADIO 2 FUSE RED WIRE RED/BLK WIRE RED/WHT WIRE RFC TAM VIO WIRE VZ (GND) GND (VZ) WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE

+B +BM 10 2 NSSD 19 20 11 13 18 NEO TRC+ ENG+ TRC- ENG- PNK WIRE 2 4 5 6 7 8 13 17 26 EC BATT 3 4 9 13 14 18 19 20 21 22 26 27 29 30 31 32 33 34 35 TC STP NEO 4 TRC+ ENG+ PNK WIRE ACCEL PEDAL POSITION SENSOR (BEHIND LEFT CENTER OF DASH) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) COMBINATION METER COMBINATION SWITCH CCS COMPUTER DATA LINES SYSTEM CRUISE CRUISE CONTROL SWITCH CRUISE IND DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) D-IG FUSE DRIVER SIDE J/B ECU (BEHIND LEFT KICK PANEL) STPI EB (RIGHT SIDE OF CYLINDER HEAD) EC (LEFT SIDE OF CYLINDER HEAD) ED (REAR OF LEFT FENDER) ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) ENGINE ROOM 2 R/B (ON LEFT EFI RELAY ETA VC GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES HOT IN ON OR START IH (UNDER STEERING COLUMN) JUNCTION CONN- ECTOR 2 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 2 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 4 (IN ECU BOX) JUNCTION CONNECTOR 7 (IN ECU BOX) JUNCTION CONNECTOR 9 (BEHIND TOP LEFT END OF DASH) JUNCTION CONNECTORS 4, 5 (IN ECU BOX) LT GRN WIRE LT GRN/BLK WIRE M- M+ MREL IGSW SIL NCA WIRE PARK/ NEUTRAL POSITION SWITCH (ON TRANSMISSION) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PNK/BLK WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RES/ ECC SET/ COAST SG WFSE SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) SIL SKID CONTROL ECU (BEHIND LEFT END OF DASH) SPEEDOMETER STOP FUSE STOPLIGHT SWITCH (ON TOP OF BRAKE PEDAL BRACKET) THROTTLE CONTROL MOTOR, SENSOR (ON THROTTLE BODY) VEHICLE SPEED SENSOR (ELECTONICALLY CONTROLLED TRANSMISSION) (ON TRANSMISSION) VIO WIRE VPA EPA VCPA WFSE EPTK VPTK TRC- ENG- CCS WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 TC CLTB BLK WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/YEL WIRE COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM ANTI-THEFT SYSTEM COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM HEADLIGHTS SYSTEM DBKL BKLR DBIL DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU ENGINE CONTROLS SYSTEM EXTERIOR LIGHTS SYSTEM ENGINE ROOM 1 R/B (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) EXTERIOR LIGHTS SYSTEM ANTI-LOCK BRAKES SYSTEM SHIFT INTERLOCK SYSTEM FUEL TSW FUSE GRN WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE HAZ STPA STP MPX-B HDCY HDLO HRLY HEAD HOT AT ALL TIMES HOT IN RUN OR START IG (LEFT SIDE OF STEERING COLUMN) IGNITION SWITCH II (ON LEFT SIDE DASH BRACE) INTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM INTERIOR LIGHTS SYSTEM INTERIOR LIGHTS SYSTEM INTERIOR LIGHTS SYSTEM JUNCTION CONNECTOR 13 (BEHIND RIGHT SIDE OF DASH) LOCK LT GRN WIRE MPX-IG FUSE MPX-IG HAZ IG 2 3 4 5 6 7 8 9 10 PANEL FUSE PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU PNK WIRE PNK/BLU WIRE R/E RET CNCL MSW M+ TR+ CLTS CLTE RV HDCL RED WIRE RED/BLK WIRE RED/WHT WIRE RED/YEL WIRE RUN WIRE STPO STPI TURN LH GND TURN RH TURN, HAZ FUSE VIO WIRE VIO/WHT WIRE WARNING SYSTEM PASSIVE RESTRAINT SYSTEM WARNING SYSTEM WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE WIPER/WASHER SYSTEM HEADLIGHTS SYSTEM YEL WIRE

BDR BLK/RED WIRE BLK/YEL WIRE BLU/ORG 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 INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) JC-18 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) RED/BLU WIRE RED/WHT WIRE RIGHT REMOTE CONTROL MIRROR SIG VIO/WHT WIRE WHT/BLK WIRE

BKUP BLK WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BP (AT LEFT QUARTERPANEL) BUBS COMPUTER DATA LINES SYSTEM DEF DEFOGGER SYSTEM DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) EXTERIOR LIGHTS SYSTEM COMPUTER DATA LINES SYSTEM EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM INTERIOR LIGHTS SYSTEM FUEL OPN FUSE FUSE GRN/RED WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN ON OR START MPX-IG FUSE JC-17 LCM+ LCTY LUGGAGE ROOM J/B (AT LEFT REAR CORNER OF LUGGAGE COMPT) LUGGAGE ROOM J/B ECU MPX MPX-IG MPX-B HIC P-GND TAIL 2 L-O/C(P) FUEL OPN(P) FUEL OPN(O) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PNK LGCY WIRE RED WIRE RED/BLK WIRE RED/WHT WIRE TRUNK, TAILGATE, FUEL DOORS SYSTEM VIO WIRE VIO/WHT WIRE WHT/BLK WIRE WHT/RED 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 AIRBAG WIP 2 3 4 5 6 7 8 9 10 BKLL BLU WIRE BLU/RED WIRE COMPUTER DATA LINES SYSTEM DRIVER SIDE J/B ECU CIRCUIT FSPT SNOW PWR FUSE GRN WIRE GRN/RED WIRE GRY/BLU WIRE HDLV HR WNG HEADLIGHTS SYSTEM AIR CONDITIONING SYSTEM HEADLIGHTS SYSTEM 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) INTERIOR LIGHTS SYSTEM TRANSMISSIONS SYSTEM TRANSMISSIONS SYSTEM LOCK MPX MPX-B MPX-IG MPX-IG FUSE NAVIGATION SYSTEM WARNING SYSTEM PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PASSENGER SIDE J/B ECU (RIGHT SIDE KICK PANEL) PASSIVE RESTRAINT SYSTEM RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RUN WIRE SUPPLEMENTAL RESTRAINTS SYSTEM VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE WIPER/WASHER SYSTEM WIPER/WASHER SYSTEM WIPER/WASHER SYSTEM YEL WIRE YEL/RED 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 BQ (AT RIGHT QUARTERPANEL) 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) DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) MPX-IG FUSE 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 ILL INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) JC-18 LEFT DOOR COURTESY SWITCH LEFT DOOR LOCK CONTROL SWITCH (POWER WINDOW MASTER SWITCH) LUGGAGE COMPARTMENT DOOR DETECTION SWITCH (IN LUGGAGE COMPT, NEAR LOCK ASSEMBLY) LUGGAGE COMPARTMENT DOOR LOCK MOTOR (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) 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 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 6 7 8 9 10 11 12 13 14 CPUB 24 23 21 20 13 12 IMI IMO 5 4 3 2 1 GND TXCT RXCK CODE +B 7 15 16 HRLY COMPUTER DATA LINES SYSTEM 7 8 1 2 4 5 DL LL PL RL AIRBAG BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLU WIRE BLU/ WHT WIRE BLU/ORG 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 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) FRONT CONTROLLER GRN BLK/ WIRE GRN WIRE GRN/ YEL WIRE GRN/BLK WIRE GRN/RED 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/BLK WIRE MAIN FUSE MAIN LUGGAGE COMPARTMENT DOOR OPENER SWITCH MPX ORG/ WIRE PARK/NEUTRAL POSITION SWITCH (ON TRANSMISSION) 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 RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE ROOM 2 R/B) RSSI SECURITY INDICATOR LIGHT 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 WHT/YEL WIRE WIRELESS DOOR LOCK BUZZER YEL WIRE