Lexus RX III (2008-2012) main body ecu Wiring diagrams

24 23 CANL CANH PNK WIRE 4 1 6 8 SI IG+ ES B/LE 4 3 2 1 IG CANH CANL GND 5 4 3 2 6 PNK IG CANH CANL ESS BAT WIRE BLK WIRE BRAKE FLUID LEVEL WARNING SWITCH (BRAKE FLUID BRN WIRE COLUMN) COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM FUSE GAUGE 2 FUSE GRN WIRE GRY WIRE INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEFT FRONT SPEED SENSOR (AT LEFT FRONT HUB ASSEMBLY) LEFT REAR SPEED SENSOR (ON LEFT REAR WHEEL ASSEMBLY) LT BLU WIRE LT GRN WIRE MAIN BODY ECU ORG/ WIRE PNK WIRE RED WIRE RELAY ENERGIZED RESERVOIR) RIGHT FRONT SPEED SENSOR (AT RIGHT FRONT HUB ASSEMBLY) RIGHT REAR SPEED SENSOR (ON RIGHT REAR WHEEL ASSEMBLY) STEERING SENSOR (ON STEERING VIO WIRE VSC OFF SWITCH WHT WIRE WHT/BLK WIRE YAW RATE SENSOR ASSEMBLY (LEFT SIDE OF CENTER CONSOLE) YEL WIRE

BACK DOOR LOCK ASSEMBLY (LOWER CENTER OF BACK DOOR) BACK DOOR OPENER SWITCH ASSEMBLY BK/DR LOCK RELAY BLK WIRE BLU WIRE CERTIFICATION ECU ASSEMBLY (RIGHT SIDE OF DASH) COMPUTER DATA LINES SYSTEM D/L ALT B FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LOCK LT GRN WIRE MAIN BODY ECU PNK WIRE RED WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

AIR BAG SENSOR ASSEMBLY BACK DOOR CONTROL SWITCH BACK DOOR OPENER SWITCH ASSEMBLY BLK WIRE BRN WIRE CENTER STOP LIGHT ASSEMBLY COMBINATION METER ASSEMBLY FRONT POWER POINT SOCKET ASSEMBLY ID CODE BOX INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) J/C LEFT ELECTRICAL KEY ANTENNA LEFT FRONT DOOR W/ MOTOR LOCK ASSEMBLY LEFT FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LEFT LICENSE PLATE LIGHT ASSEMBLY LEFT OUTER MIRROR CONTROL ECU ASSEMBLY LEFT REAR LIGHT ASSEMBLY MAIN BODY ECU MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY NCA WIRE OPTION CONNECTOR (GLASS BREAKAGE SENSOR ECU ASSEMBLY) POWER MANAGEMENT CONTROL ECU POWER SLIDE BACK DOOR WARNING BUZZER REAR WINDOW DEFOGGER REAR WIPER, MOTOR, BRACKET ASSEMBLY RIGHT REAR LIGHT ASSEMBLY SPIRAL CABLE SUB-ASSEMBLY TRANSMISSION CONTROL SWITCH TURN SIGNAL SEAT FLASHER HEATER POWER ASSEMBLY SWITCH SWITCH VIO WIRE WHT WIRE WHT/BLK WIRE WINDSHIELD WIPER SWITCH ASSEMBLY YAW RATE SENSOR ASSEMBLY

ENGINE ROOM J/B ASSEMBLY (LEFT SIDE OF ENGINE COMPT) GRY WIRE HORN HORN ASSEMBLY (HIGH PITCH) (LEFT FRONT OF ENGINE COMPT) HORN ASSEMBLY (LOW PITCH) (RIGHT FRONT OF ENGINE COMPT) HORN FUSE HORN RELAY HORN SWITCH HOT AT ALL TIMES INSTRUMENT PANEL J/B ASSEMBLY (LEFT END OF DASH) MAIN BODY ECU RED WIRE SPIRAL CABLE SUB-ASSEMBLY (IN STEERING COLUMN) STEERING PAD SWITCH ASSEMBLY WHT WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 LMVR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 RMVR 1 2 3 4 5 6 7 8 9 MM 10 11 12 13 14 ECI- BDR BDR CANH CANP ECI+ PNK WIRE BLK WIRE BLK/GRN WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BRN WIRE CANN CANP CERTIFICATION ECU ASSEMBLY (RIGHT SIDE OF DASH) COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM MIRRORS SYSTEM EC+ ECI+ ECI+ MSWE BDR ECU-B 1 FUSE ECU-B 2 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) F/L DOOR FUSE F/R DOOR FUSE FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEFT OUTER MIRROR CONTROL ECU ASSEMBLY (IN LEFT FRONT DOOR) LEFT OUTER REAR VIEW MIRROR ASSEMBLY (IN LEFT FRONT DOOR) LMHR LM+R MR- HTR- HSSR LT BLU WIRE LT GRN WIRE MAIN BODY ECU MIRROR ADJUST SWITCH MIRROR AUTO RETRACT SWITCH MIRROR RETRACT SWITCH MIRROR SELECT SWITCH MIRRORS SYSTEM MR+ HTR+ LVC VSSR EC+ MR+ HTR+ RVC VSSR EC+ MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY ORG/ WIRE PNK WIRE RED WIRE RED/WHT WIRE RELAY ENERGIZED RIGHT OUTER MIRROR CONTROL ECU ASSEMBLY (IN RIGHT FRONT DOOR) RIGHT OUTER REAR VIEW MIRROR ASSEMBLY (IN RIGHT FRONT DOOR) RMHR RM+R MR- HTR- HSSR SEAT MEMORY SWITCH SET- SIG CPUB GND CANN CANP SIG CPUB PNK WIRE VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

2 5 4 1 RSSI DATA +5 GND 5 15 16 RCO RDA RSSI 6 9 8 4 3 2 1 13 7 CPUB CANP CANN 7 8 4 CANN CANP PBCL 9 10 CANH CANL BLK WIRE BLU WIRE BRN WIRE CANN CERTIFICATION ECU ASSEMBLY (RIGHT SIDE OF DASH) COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM DOOR CONTROL RECEIVER (RIGHT "C" PILLAR) ECU ASSEMBLY (IN LEFT FRONT DOOR) ECU-B 1 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FLCY CANP CANN FUSE GND TIM- GRN WIRE GRY WIRE HEADLAMP DIMMER SWITCH ASSEMBLY HOT AT ALL TIMES INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEFT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (AT LEFT "B" PILLAR) LEFT FRONT POSITION CONTROL ECU, SWITCH ASSEMBLY LEFT FRONT SEAT INNER BELT ASSEMBLY (UNDER DRIVER'S SEAT) LEFT OUTER MIRROR CONTROL LT BLU WIRE LT GRN WIRE MAIN BODY ECU MM MSWE GND MSW MULTIPLEX TILT, TELESCOPIC ECU (AT BASE OF STEERING COLUMN) ORG/ WIRE PNK WIRE POWER TILT MOTOR (ON STEERING COLUMN) RED WIRE RELAY ENERGIZED SEAT MEMORY SWITCH SET- SYSTEM TELESCO SHORT TELESCOPIC MOTOR TELESCOPIC SENSOR TEM TES TI, TE FUSE TILT DOWN TILT UP TELESCO STRETCH TILT, TELESCOPIC SWITCH TIM TIS VCE VCI VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

ANTI-LOCK BRAKES SYSTEM BLK WIRE BLU WIRE BRN WIRE CIG RADIO 2 FUSE FUSE EXTERIOR EXTERIOR LIGHTS LIGHTS, SYSTEM HEADLIGHTS SYSTEMS FROM FROM FILTER FUSE (DIAGRAM 1 OF 4) FRONT POWER POINT SOCKET ASSEMBLY FUSE GAUGE 1 FUSE GRN WIRE GRY WIRE HEATER FUSE FUSE FR RR FR WIP WASH WIP FUSE FUSE FUSE INSTRUMENT CLUSTER, MIRRORS, NAVIGATION SYSTEMS LT BLU WIRE MAIN BODY ECU NAVIGATION SYSTEMS ORG/ WIRE P/POINT FUSE PNK WIRE REAR POWER POINT SOCKET ASSEMBLY RED WIRE RELAY RELAY RELAY RH LH S-HTR S-HTR FUSE FUSE RR WASH FUSE SEATS SYSTEM SHIFT INTERLOCK SYSTEM SOUND SYSTEMS SOUND, NAVIGATION SYSTEMS TAIL PANEL FUSE FUSE MAIN BODY ECU TRLY TAIL RELAY TO D/L ALT B TO ECU-ACC TO POWER MANAGEMENT CONTROL ECU (DIAGRAM 4 OF 4) TRANSMISSIONS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM VIO WIRE WARNING SYSTEM WHT WIRE WHT/BLK WIRE WIPER/ WASHER, SEATS SYSTEMS YEL WIRE

1 2 3 4 5 6 7 8 IG 1 2 4 17 5 7 ACCD AIR SUS FUSE ALT B BK/DR LOCK RELAY BLK WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM D/L ALT B FUSE D/L SOURCE RELAY DR LOCK ECU-ACC FUSE ELECTRONIC SUSPENSION SYSTEM ENGINE SWITCH F/L DOOR FUSE F/R DOOR FUSE FR FOG FUSE FR FOG RELAY FROM FUEL OPN FUSE FUSE GRN WIRE GRY WIRE INTERIOR LIGHTS, MIRRORS, MEMORY, POWER WINDOWS SYSTEMS INVERTER FUSE INVERTER RELAY (LEFT 'C' PILLAR) LEFT "C" PILLAR) LT BLU WIRE LT GRN WIRE MAIN BODY ECU MAIN SWITCH ASSEMBLY MEMORY SYSTEMS OBD FUSE ORG/ WIRE P-SEAT LH TI, TE FUSE FUSE POWER MANAGEMENT CONTROL ECU (LEFT SIDE OF DASH) POWER OUTLET SOCKET ASSEMBLY POWER TOPS SYSTEM POWER WINDOWS SYSTEM PSB P-SEAT RH FUSE FUSE R/R DOOR FUSE RED WIRE RELAY (DIAGRAM 3 OF 4) RL DOOR S/ROOF FUSE SEATS SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM TRUNK, TAILGATE, FUEL DOORS SYSTEM VOLTAGE INVERTER (LEFT SIDE OF CARGO AREA) WHT/BLK WIRE YEL WIRE

1 10 9 LMVR LM+R LMHR 1 10 9 RMVR RM+R RMHR 14 8 9 BDR CANH CANP PNK WIRE 14 8 9 BDR CANN CAPN PNK WIRE 3 11 MR+ MR- BDR BLK WIRE BLK/GRN WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BRN WIRE CANN CANP CERTIFICATION ECU ASSEMBLY (RIGHT SIDE OF DASH) COMPUTER DATA LINES SYSTEM EC+ ECU-B 2 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF F/L DOOR FUSE F/R DOOR FUSE FRONT DOOR) GRN WIRE GRY WIRE HOT AT ALL TIMES HTR INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEFT OUTER MIRROR CONTROL ECU ASSEMBLY (IN LEFT FRONT DOOR) LEFT OUTER REAR VIEW MIRROR ASSEMBLY (ON LEFT FRONT DOOR) LT BLU WIRE LT GRN WIRE LVC MAIN BODY ECU MIRROR ADJUST SWITCH MIRROR AUTO RETRACT SWITCH MIRROR RETRACT SWITCH MIRROR SELECT SWITCH +B MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY ORG/ WIRE PNK HSSR WIRE RED WIRE RED/WHT WIRE RIGHT OUTER MIRROR CONTROL ECU ASSEMBLY (IN RIGHT FRONT DOOR) RIGHT OUTER REAR VIEW MIRROR ASSEMBLY (ON RIGHT RVC TRN+ VIO WIRE VSSR WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

1 4 8 9 5 +B FSR- FSR+ BSW BGND 1 6 12 24 23 IG+ ES PBLT CANL CANH 16 24 FSR+ FSR- 18 10 LBE- LBE+ AIR BAG SENSOR ASSEMBLY (BELOW CENTER CONSOLE) BLK WIRE BLU WIRE BRN WIRE COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM CANL CANH FUSE GAUGE 2 FUSE GRN WIRE GRY WIRE HOT IN ON OR START INSTRUMENT PANEL J/B ASSEMBLY (LEFT SIDE OF DASH) LEFT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (AT LEFT "B" PILLAR) LEFT FRONT SEAT INNER BELT ASSEMBLY (UNDER DRIVER'S SEAT) LT GRN WIRE MAIN BODY ECU OCCUPANT DETECTION ECU (UNDER FRONT PASSENGER'S SEAT) ORG/ WIRE PNK WIRE RED WIRE RIGHT FRONT SEAT INNER BELT ASSEMBLY (UNDER FRONT PASSENGER'S SEAT) VIO WIRE W/ W/O NAVIGATION NAVIGATION SYSTEM SYSTEM WHT WIRE WHT/BLK WIRE YEL WIRE