Lexus RX III (2008-2012) ecm (right front of engine compt) Wiring diagrams

1 2 3 4 5 6 CLK DIN DOUT STBI GND 1 2 PE PB 12 25 CANH CANL 3 19 31 30 20 WP CLK ITE ETI STB A/C AMPLIFIER ASSEMBLY (RIGHT SIDE OF DASH) A/C BLOWER ASSEMBLY (RIGHT SIDE OF DASH) A/C EVAPORATOR TEMPERATURE SENSOR A/C W/P A/C W/P RELAY ACPB ACPE B+ BUS BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BUS - BUS G COMPUTER DATA LINES SYSTEM CONNECTOR HOUSING COLOR CONNECTOR HOUSING COLOR (BLACK) CONNECTOR HOUSING COLOR (BLUE) CONNECTOR HOUSING COLOR (GREEN) COOLING FAN ECU 1 (LEFT FRONT OF ENGINE COMPT) COOLING FAN ECU 2 (RIGHT FRONT OF ENGINE COMPT) DAMPER SERVO MOTOR (AIR INLET) DAMPER SERVO MOTOR (AIR MIX DRIVER SIDE) DAMPER SERVO MOTOR (AIR MIX FRONT PASSENGER SIDE) DAMPER SERVO MOTOR (AIR VENT MODE) ECM (RIGHT FRONT OF ENGINE COMPT) ECU HEATER 2 FUSE FUSE EFI ENGINE COOLANT TEMPERATURE SENSOR (TOP REAR OF ENGINE) ENGINE ROOM J/B ASSEMBLY (LEFT SIDE OF ENGINE COMPT) ENGINE ROOM R/B 3 (LEFT SIDE OF ENGINE COMPT) ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FUSE GRN WIRE GRN/RED WIRE HEATER WATER PUMP ASSEMBLY (LEFT SIDE OF ENGINE COMPT) HOT AT ALL TIMES INVERTER ASSEMBLY W/ CONVERTER (LEFT SIDE OF ENGINE COMPT) LT GRN WIRE ORG/ WIRE PNK WIRE POWER MANAGEMENT CONTROL ECU (LEFT SIDE OF DASH) RDI FAN 1 RDI FAN 2 RDI FAN RELAY 1 RDI FAN RELAY 2 RED WIRE RED/BLK WIRE RELAY ENERGIZED RFC TOP OF ENGINE) VIO WIRE W/ MOTOR COMPRESSOR ASSEMBLY (RIGHT FRONT OF ENGINE COMPT) WHT WIRE WHT/BLK WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 FLCL DIM LCTY LCYL AIR BAG SENSOR ASSEMBLY (BELOW CENTER CONSOLE) BLK WIRE BLU WIRE BRN WIRE CANL CANH CANN CANP CERTIFICATION NAVIGATION ECU ASSEMBLY RECEIVER (RIGHT SIDE ASSEMBLY OF DASH) COMBINATION METER ASSEMBLY CSPT DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM INTERIOR LIGHTS SYSTEM ECM (RIGHT FRONT OF ENGINE COMPT) GRN WIRE GRY WIRE HEAD TAIL HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM INTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM HEADLIGHTS SYSTEM HU RCTY LSFL HF INTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM LSFR BCTY CLTB CLTS CLTE LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) ORG/ WIRE PNK FFOG WIRE PNK WIRE POWER MANAGEMENT CONTROL ECU (LEFT SIDE OF DASH) POWER STEERING ECU ASSEMBLY (LEFT END OF DASH) RED WIRE SKID CONTROL ECU ASSEMBLY (RIGHT SIDE OF DASH) STEERING SENSOR (IN STEERING COLUMN) VIO WIRE W/ POWER BACK DOOR W/O POWER BACK DOOR WHT WIRE YAW RATE SENSOR ASSEMBLY (UNDER CENTER FLOOR CONSOLE) YEL WIRE

11 35 34 TC 13 22 CANH CANL 16 15 14 13 12 11 10 9 8 7 6 BAT 4 3 2 1 CG 42 12 25 26 13 TC CANH CANL CAN- CAN+ 9 10 13 14 CANP CANN CANL CANH A/C AMPLIFIER (RIGHT SIDE OF DASH) (RIGHT SIDE OF DASH) AIRBAG SENSOR ASSEMBLY (BELOW CENTER CONSOLE) BLK WIRE BLU WIRE BRN WIRE CANL TC TS CANN CANP CERTIFICATION ECU ASSEMBLY (RIGHT SIDE OF DASH) DCM (TELEMATICS TRANSCEIVER) (UNDER CENTER CONSOLE) DIA ECM (RIGHT FRONT OF ENGINE COMPT) GRN WIRE GRY WIRE HEADLIGHT SWIVEL ECU ASSEMBLY (LEFT END OF DASH) HOT AT ALL TIMES INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) INIT LEFT FRONT POSITION CONTROL ECU, SWITCH ASSEMBLY LEFT OUTER MIRROR CONTROL ECU ASSEMBLY (IN LEFT FRONT DOOR) LIN LIN 1 LIN 2 LINK CONNECTOR) (UNDER LEFT SIDE OF DASH) LT BLU WIRE LT GRN WIRE LVL SIL CANH MAIN BODY ECU INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) OBD FUSE OCCUPANT DETECTION ECU (UNDER FRONT PASSENGER'S SEAT) ORG/ WIRE PNK WIRE POWER MANAGEMENT CONTROL ECU (LEFT SIDE OF DASH) RED WIRE SIL SKID CONTROL ECU ASSEMBLY (RIGHT SIDE OF DASH) TOP OF ENGINE) VIO WIRE W/ POWER BACK DOOR W/O POWER BACK DOOR WHT WIRE WHT/BLK WIRE YEL WIRE

10 9 13 PNK WIRE 11 12 CANH CANL 12 25 CANH CANL COMPUTER DATA LINES SYSTEM A/C AMPLIFIER ASSEMBLY (RIGHT SIDE OF DASH) A/C PRESSURE SENSOR (RIGHT SIDE OF ENGINE COMPT) BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COOLING FAN ECU 1 (LEFT FRONT OF ENGINE COMPT) COOLING FAN ECU 2 (RIGHT FRONT OF ENGINE COMPT) ECM (RIGHT FRONT OF ENGINE COMPT) EFI ENGINE COOLANT TEMPERATURE SENSOR (TOP REAR OF ENGINE) ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FAN MOTOR 1 FUSE GRN WIRE HOT AT ALL TIMES LT GRN WIRE PNK WIRE PRE SG-2 RDI FAN 1 RDI FAN 2 RDI FAN RELAY 1 RDI FAN RELAY 2 RED WIRE RELAY ENERGIZED RFC VIO WIRE WHT WIRE WHT/BLK WIRE

+B MREL 10 11 14 35 34 17 COMPUTER DATA LINES SYSTEM 21 22 12 RR- RR+ RSS 23 22 13 FR- FR+ 25 12 4 3 21 16 CANL CANH 32 31 11 FL- FL+ FSS 4 16 STPO 6 35 19 27 26 34 18 17 MREL 85 86 118 119 28 29 108 VTA BLK WIRE BLU WIRE BRN WIRE COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM ECM (RIGHT FRONT OF ENGINE COMPT) EFI EFI MAIN RELAY MAIN FUSE ENGINE ROOM R/B 2 ASSEMBLY (LEFT REAR OF ENGINE COMPT) ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) GRN WIRE HOT AT ALL TIMES HV R/B 1 FUSE IGCT 3 FUSE IGCT MAIN RELAY LEFT FRONT SPEED SENSOR (LEFT FRONT HUB ASSEMBLY) LEFT REAR SPEED SENSOR (LEFT REAR HUB ASSEMBLY) LT GRN WIRE M- M+ 1 2 3 5 4 6 NCA WIRE ORG/ WIRE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (ON TRANSMISSION) PNK WIRE POWER MANAGEMENT CONTROL ECU (LEFT SIDE OF DASH) RED WIRE RIGHT FRONT SPEED SENSOR (RIGHT FRONT HUB ASSEMBLY) RIGHT REAR SPEED SENSOR (RIGHT REAR HUB ASSEMBLY) RL- RL+ SKID CONTROL ECU ASSEMBLY (RIGHT SIDE OF DASH) STOP FUSE THROTTLE W/ MOTOR BODY ASSEMBLY (RIGHT REAR OF ENGINE) VCTA ETA M+ M- VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

+B MREL 25 12 4 3 21 16 CANL CANH 6 11 35 19 27 26 34 18 17 MREL 85 86 118 119 28 29 108 VTA ASSEMBLY (IN STEERING COLUMN) BLK WIRE BLU WIRE BRN WIRE COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM CRUISE CONTROL MAIN SWITCH ECM (RIGHT FRONT OF ENGINE COMPT) EFI EFI MAIN RELAY MAIN FUSE ENGINE ROOM R/B 2 ASSEMBLY (LEFT REAR OF ENGINE COMPT) ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) GRN WIRE HOT AT ALL TIMES HV R/B 1 FUSE IGCT 3 FUSE IGCT MAIN RELAY LT GRN WIRE M- M+ 1 2 3 5 4 6 NCA WIRE ON OFF ORG/ WIRE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (ON TRANSMISSION) PNK WIRE POWER MANAGEMENT CONTROL ECU (LEFT SIDE OF DASH) RED WIRE SPIRAL CABLE SUB- STEERING PAD SWITCH ASSEMBLY STOP FUSE THROTTLE W/ MOTOR BODY ASSEMBLY (RIGHT REAR OF ENGINE) VCTA ETA M+ M- WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BRN WIRE COMBINATION METER ASSEMBLY ECM (RIGHT FRONT OF ENGINE COMPT) FUEL FUEL FILLER OPENING LID LOCK SUB-ASSEMBLY (LEFT REAR OF VEHICLE) FUEL LID COURTESY SWITCH FUEL LID OPENER SWITCH FUGI FUO FUWI GRY WIRE HOT AT ALL TIMES FUEL OPN FUSE HOT IN ON OR START GAUGE 2 FUSE INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEFT "C" PILLAR) LIDO LT BLU WIRE LT GRN WIRE ORG/ WIRE PNK WIRE RED WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE ECM (RIGHT FRONT OF ENGINE COMPT) EFI ENGINE COOLANT TEMPERATURE SENSOR (TOP REAR OF ENGINE) GRN WIRE GRN/RED WIRE INTAKE MASS AIR FLOW METER (LEFT REAR OF ENGINE COMPT) KNOCK CONTROL SENSOR (BANK 1) (TOP OF ENGINE, UNDER INTAKE MANIFOLD) LT GRN WIRE M- M+ +BM NCA WIRE ORG/ WIRE OXYGEN SENSOR (BANK 1 SENSOR 2) (IN EXHAUST) PNK WIRE PURGE VSV (LEFT REAR OF ENGINE) RED WIRE THE TOP OF ENGINE) VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

A/F RELAY BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE C/OPN RELAY CANH CAN+ EC BATT CANISTER PRESSURE SENSOR CANISTER PUMP MODULE (UNDER LEFT SIDE OF VEHICLE CHASSIS) CANL CAN- COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM ECM (RIGHT FRONT OF ENGINE COMPT) EFI 2 F/PMP FUSE FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FPR VPMP MPMP FUEL TANK PRESSURE SENSOR (IN FUEL TANK) FUSE GRN WIRE GRN/RED WIRE GRY WIRE HOT AT ALL TIMES ENGINE ROOM J/B ASSEMBLY (LEFT SIDE OF ENGINE COMPT) A/F FUSE INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEAK DETECTION PUMP LT GRN WIRE ORG/ WIRE PNK WIRE PPMP EPPM VCPP VC PTNK RED WIRE RELAY ENERGIZED RFC TOP OF ENGINE) VENT VALVE VIO WIRE VSV (FUEL VAPOR-CONTAINMENT VALVE) (UNDER LEFT REAR OF VEHICLE) WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE ECM (RIGHT FRONT OF ENGINE COMPT) EKNK ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) EPIM ETCS FUSE ETHA GRN WIRE HOT AT ALL TIMES IGN FUSE LT GRN WIRE NCA WIRE NE+ ORG/ WIRE PIM PNK 18 19 WIRE PNK WIRE RED WIRE RELAY ENERGIZED THA VPIM WHT WIRE WHT/BLU WIRE YEL WIRE