Lexus SC II facelift (2005-2010) engine control module (at left side of engine compt, in ecu box) Wiring diagrams

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 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

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

10 9 RFC HP BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DUAL 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) ENGINE ROOM 1 R/B (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) ENGINE ROOM 2 R/B FAN FUSE FAN RELAY (ON LEFT SIDE OF ENGINE COMPT, FORWARD OF STRUT TOWER) FAN-2 FUSE HEATER FUSE HOT AT ALL TIMES HOT IN ON OR START IF (AT LEFT KICK PANEL) II (ON LEFT SIDE DASH BRACE) JUNCTION CONNECTOR 1 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 3 (IN ENGINE ROOM 2 R/B) JUNCTION CONNECTOR 8 (BEHIND LEFT END OF DASH) M+(M) M-(M) M+(S) M-(S) PRESSURE SWITCH (AT UPPER LEFT RADIATOR SUPPORT) RED WIRE RED/BLU WIRE SINGLE VIO WIRE WHT WIRE YEL WIRE

12 4 TS D/G 16 3 TACH TC 24 25 CANL CANH BLK WIRE BLK/WHT WIRE BLK/YEL WIRE BRN WIRE CENTER J/B (BEHIND RIGHT CENTER OF DASH) CG SG CANH SIL COMBINATION METER DATA LINK CONNECTOR (DLC) 3 (BEHIND LEFT SIDE OF DASH) DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) EC (LEFT SIDE OF CYLINDER HEAD) ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) GATEWAY ECU (BEHIND RIGHT SIDE OF DASH) GRN WIRE HOT AT ALL TIMES J/C 25 (BEHIND RIGHT SIDE OF DASH) J/C 4, 5 (IN ECU BOX) J/C 9, 10 (BEHIND TOP LEFT END OF DASH) MULTI-DISPLAY OBD FUSE PNK WIRE PNK/BLK WIRE RED WIRE SIL SKID CONTROL ECU (BEHIND LEFT END OF DASH) TAC TRANSLATE ECU (LEFT SIDE OF DASH) TS TC CANL WHT WIRE WHT/BLK WIRE WHT/GRN WIRE

1 2 PNK WIRE 14 5 MOL MOPS 22 24 25 SPD CANL CANH 9 11 12 18 PNK WIRE A/C FUSE ABS IND. AFS OFF IND (USA) MAINT REQD IND BLK WIRE BLK/ORG WIRE BLK/YEL WIRE BLU WIRE BLU/ORG WIRE BLU/RED WIRE BRAKE FLUID LEVEL WARNING SWITCH (IN BRAKE FLUID RESERVOIR) BRAKE IND BRN WIRE BUZZER CENTER J/B (BEHIND RIGHT CENTER OF DASH) CHARGE IND OIL PRESSURE IND CIRCUIT SUPPLY POWER CLOCK (A/C CONTROL ASSEMBLY) +B COMBINATION METER COMPUTER DATA LINES SYSTEM CRUISE IND CTY DRIVER DOOR ECU (IN DRIVER'S DOOR) DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) ECT PWR IND ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) ENGINE CONTROLS SYSTEM ENGINE OIL LEVEL SENSOR (ON RIGHT FRONT OF ENGINE) ETC SNOW IND EXTERIOR LIGHTS SYSTEM INTERIOR FRONT FOG IND FUEL FUEL IND FUEL SENDER (MAIN) (IN FUEL TANK) FUEL SENDER (SUB) (IN FUEL TANK) FUSE GRN WIRE GRN/BLK WIRE HEAD IND (USA) HIGH BEAM IND HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) D-IG FUSE IH (UNDER STEERING COLUMN) II (ON LEFT SIDE DASH BRACE) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) J/C 13 (BEHIND RIGHT SIDE OF DASH) J/C 4 (IN ECU BOX) LBL LCD (ODOMETER/ TRIP) LCD (SEQUENTIAL) LEFT DOOR COURTESY SWITCH LEFT TURN IND LIGHTS SYSTEM LT BLU WIRE LT GRN WIRE MALFUNCTION IND LAMP MPXB MULTI- DISPLAY SPD MULTI-DISPLAY NAVIGATION ECU (AT RIGHT REAR CORNER OF LUGGAGE COMPT) OIL LEVEL IND OIL PRESSURE SWITCH (ON LEFT FRONT SIDE OF ENGINE) OPEN DOOR IND ORG/ WIRE PARKING BRAKE SWITCH (BEHIND LEFT SIDE OF DASH) PASSENGER DOOR ECU (IN RIGHT DOOR) PASSENGER SIDE J/B PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) RADIO 2 FUSE REAR LIGHTS IND RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT DOOR COURTESY SWITCH RIGHT TURN IND SEAT BELT IND SKID CONTROL ECU (BEHIND LEFT END OF DASH) SLIP IND SPEEDOMETER SRS IND STEREO COMPONENT AMPLIFIER (AT RIGHT REAR CORNER OF LUGGAGE COMPT) TAC TACH TACHOMETER TAIL IND (CANADA) TIRE PRESSURE IND TRIP SWITCH VIO WIRE VSC OFF IND W/ NAVIGATION SYSTEM WARNING SYSTEM WASHER IND WATER TEMPERATURE WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

1 25 17 26 16 20 19 8 18 7 GND 23 15 16 24 MSWE 4 5 6 CPUB SIG BDR 5 7 MPX-B 7 10 11 R/E MSW M+ A/T INDICATOR LIGHT SWITCH (ON TRANSMISSION) BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/ORG WIRE BLU/YEL WIRE CANL CANH COMPUTER DATA LINES SYSTEM D-DOOR FUSE P-DOOR FUSE D-IG FUSE DEFOGGER SYSTEM DRIVER DOOR ECU (IN DRIVER'S DOOR) DRIVER SIDE J/B (BEHIND LEFT KICK PANEL) DRIVER SIDE J/B ECU DRIVING POSITION MEMORY SWITCH (DRIVER'S SEAT) ENGINE CONTROL MODULE (AT LEFT SIDE OF ENGINE COMPT, IN ECU BOX) ENGINE ROOM 1 R/B (ON RIGHT SIDE OF ENGINE COMPT, BEHIND STRUT TOWER) FUSE GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR START II (ON LEFT SIDE DASH BRACE) INSTRUMENT PANEL J/B (BEHIND UPPER CENTER OF DASH) J/C 13 (BEHIND RIGHT SIDE OF DASH) J/C 18 (RIGHT REAR OF LUGGAGE COMPT) J/C 5 (IN ECU BOX) LEFT REMOTE CONTROL MIRROR LT GRN WIRE LT GRN/BLK WIRE LT/RT LUGGAGE ROOM J/B (LEFT REAR CORNER OF LUGGAGE COMPT) MPX-IG MPX-IG FUSE MRY MSW M+ ORG/ WIRE PASSENGER DOOR ECU (IN RIGHT DOOR) PASSENGER SIDE J/B (BEHIND RIGHT KICK PANEL) PNK PVC HSSR VSSR PM+R PMHR PMVR MR- MR+ WIRE PNK WIRE PNK/BLU WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE REMOTE CONTROL MIRROR SWITCH RET RETRAC RIGHT REMOTE CONTROL MIRROR SENSOR UP/DN VIO WIRE VIO/WHT WIRE W/ MIRROR RETRACTOR 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