Lexus RX III (2008-2012) (top rear of engine) Wiring diagrams

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 BATT 120 46 2 25 27 NSW STA 34 25 38 27 10 11 MREL 55 56 57 58 59 60 VPA BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CAN (-) CAN (+) COMPUTER DATA LINES SYSTEM ECM (LEFT SIDE OF ENGINE COMPT) EFI 1 FUSE EFI MAIN EFI MAIN RELAY ENGINE ROOM J/B ASSEMBLY ENGINE ROOM R/B ASSEMBLY (LEFT FRONT FENDER APRON) ETA VCTA M+ M- FUSE GRN WIRE GRN/RED WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT CLUSTER SYSTEM INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LT GRN WIRE NCB NCO NTB NTO ORG/ WIRE PNK WIRE RED WIRE RED/BLK WIRE SFTU SFTD CANH CANL SLU- SLU+ SLT- SLT+ STA NSW STP IGSW PNK WIRE STOP FUSE STOP LIGHT SWITCH ASSEMBLY (ON BRAKE PEDAL ASSEMBLY) STP PNK WIRE THROTTLE W/ MOTOR BODY ASSEMBLY (REAR LEFT SIDE OF ENGINE) TRANSMISSION CONTROL ECU ASSEMBLY (LEFT FRONT OF ENGINE COMPT) VCPA EPA PNK WIRE VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

BKUP LP FUSE BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM ENGINE ROOM R/B ASSEMBLY (LEFT FRONT FENDER APRON) FUSE GAUGE 2 FUSE GRN/RED WIRE GRY WIRE HOT IN ON OR START INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LT GRN WIRE ORG/ WIRE PARK/NEUTRAL POSITION SWITCH (ON RIGHT SIDE OF TRANSMISSION) PNK CANH WIRE PNK WIRE POWER MANAGEMENT CONTROL ECU (LEFT END OF DASH) RED WIRE STAR TRANSMISSION CONTROL SWITCH (UNDER CENTER CONSOLE) WHT WIRE WHT/BLK WIRE YEL 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

BRN WIRE CERTIFICATION ECU ASSEMBLY CLEARANCE WARNING ECU ASSEMBLY COMBINATION METER ASSEMBLY CRANK POSITION SENSOR SHIELD FROM FUEL LID OPENER SWITCH GLOVE REMOTE BOX OPERATION LIGHT ASSEMBLY SWITCH HAZARD WARNING SIGNAL SWITCH ASSEMBLY HEADLIGHT DIMMER SWITCH ASSEMBLY HEADLIGHT DIMMER SWITCH ASSEMBLY POWER TILT MOTOR HEATER CONTROL PANEL (RADIO RECEIVER ASSEMBLY) HEIGHT CONTROL OFF SWITCH INTAKE MASS AIR FLOW METER SUB-ASSEMBLY SHIELD KNOCK CONTROL SENSOR (BANK 1, 2) SHIELD MAIN SWITCH ASSEMBLY MULTI DCM INFORMATION (TELEMATICS DISPLAY TRANSCEIVER) ASSEMBLY NCA WIRE OPTION CONNECTOR (REMOTE ENGINE STARTER) ORG/ WIRE OVERHEAD MODULE OXYGEN SENSOR (BANK 1 SENSOR 1) SHIELD OXYGEN SENSOR (BANK 1 SENSOR 2) SHIELD OXYGEN SENSOR (BANK 2 SENSOR 1) SHIELD OXYGEN SENSOR (BANK 2 SENSOR 2) SHIELD PARKING DOOR ASSIST CONTROL ECU SWITCH ASSEMBLY A/C AMPLIFIER ASSEMBLY POWER BACK DOOR MAIN SWITCH METER LIGHT MIRROR CONTROL SUB- RHEOSTAT ASSEMBLY RIGHT LEFT VISOR VISOR ASSEMBLY ASSEMBLY SATELLITE SWITCH SET SHIFT LOCK CONTROL ECU SUB-ASSEMBLY STEERING MAIN LOCK BODY ACTUATOR ECU ASSEMBLY STEERING SENSOR SUSPENSION CONTROL SWITCH THROTTLE W/ MOTOR BODY ASSEMBLY SHIELD TIRE PRESSURE WARNING RESET SWITCH VSC OFF SWITCH WATER TEMPERATURE SWITCH WHT WIRE WHT/BLK WIRE

ANTI-THEFT SYSTEM BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE C/OPN RELAY COMPUTER DATA LINES SYSTEM INSTRUMENT CLUSTER SYSTEM COOLING FANS SYSTEM RFC LGND CCS STA CRUISE CONTROL SYSTEM ECM (LEFT SIDE OF ENGINE COMPT) EFI 1 FUSE EFI MAIN F/PMP EFI 2 FUSE FUSE FUSE EFI MAIN RELAY ENGINE ROOM R/B ASSEMBLY (LEFT FRONT FENDER APRON) F/PUMP RELAY FPR MPMP FUEL PUMP, FUEL SENDER GAUGE ASSEMBLY (TOP OF FUEL TANK) GRN WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER SYSTEM LEFT QUARTERPANEL) LT BLU WIRE LT GRN WIRE NEO ORG/ WIRE PNK ANTI-THEFT SYSTEM IMI WIRE PNK CRUISE CONTROL SYSTEM WIRE PNK WIRE POWER MANAGEMENT CONTROL ECU (LEFT END OF DASH) RED WIRE SFTD IGSW IMO VPMP STP CCHG SFTU TACH TC TRANSMISSION CONTROL ECU ASSEMBLY (LEFT FRONT OF ENGINE COMPT) TRANSMISSION CONTROL SWITCH (UNDER CENTER CONSOLE) VCPA EPA PNK WIRE VIO WIRE WARNING SYSTEMS COMPUTER DATA LINES SYSTEM WHT WIRE WHT/BLK WIRE YEL WIRE

A/F FUSE A/F RELAY BKUP LP FUSE BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CANISTER PRESSURE SENSOR CANISTER PUMP MODULE (CENTER REAR OF VEHICLE) COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM ECU-B 1 FUSE ENGINE ROOM J/B ASSEMBLY (LEFT FRONT FENDER APRON) ENGINE ROOM R/B ASSEMBLY (LEFT FRONT FENDER APRON) EXCD FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT PANEL J/B ASSEMBLY (LEFT SIDE OF DASH) LEAK DETECTION PUMP LT BLU WIRE LT GRN WIRE ORG/ WIRE PARK/NEUTRAL POSITION SWITCH (ON RIGHT SIDE OF TRANSMISSION) PNK WIRE RED WIRE STOP FUSE STOP LIGHT SWITCH ASSEMBLY (ON BRAKE PEDAL ASSEMBLY) VENT VALVE VIO WIRE VOLTAGE INVERTER ASSEMBLY WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

+BM ALT BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CAN (+) COMPUTER DATA LINES SYSTEM ECM (LEFT SIDE OF ENGINE COMPT) ENGINE ROOM R/B ASSEMBLY (LEFT FRONT FENDER APRON) ETCS FUSE GRN WIRE GRN/RED WIRE GRY WIRE HIT IN ON OR START HOT AT ALL TIMES IGF IGN FUSE LT GRN WIRE PNK WIRE RED WIRE RED/BLK WIRE STARTING/ CHARGING SYSTEM WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

AICV ACIS PRG BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE ECM (LEFT SIDE OF ENGINE COMPT) EFI ENGINE COOLANT TEMPERATURE SENSOR (TOP REAR OF ENGINE) EKNK ETA VCTA ETHW ETHA EX+ GRN WIRE GRN/RED WIRE GRY WIRE INTAKE MASS AIR FLOW METER SUB-ASSEMBLY (NEAR AIR CLEANER HOUSING, ON AIR DUCT) LT GRN WIRE PNK ACM 50 30 10 WIRE PNK WIRE PURGE VSV (LEFT REAR OF ENGINE) RED WIRE THA THA VG THW PNK WIRE VSV (ACIS) (REAR OF ENGINE) VSV (ACM) (LEFT FRONT OF ENGINE COMPT) VVR+ WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CRANK POSITION SENSOR (LEFT FRONT OF ENGINE) EFI VACUUM SENSOR (RIGHT FRONT OF ENGINE) GRN WIRE IGF KNOCK CONTROL SENSOR (BANK 2) (TOP OF ENGINE, UNDER INTAKE MANIFOLD) LT GRN WIRE NCA WIRE ORG/ WIRE PIM PNK 18 19 WIRE PNK WIRE RED WIRE THROTTLE W/ MOTOR BODY ASSEMBLY (RIGHT REAR OF ENGINE) TOP OF ENGINE) VVL+ VVR+ VVT SENSOR (BANK 1 INTAKE SIDE) (FRONT OF RIGHT CYLINDER BANK) VVT SENSOR (BANK 2 INTAKE SIDE) (FRONT OF LEFT CYLINDER BANK) WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE