Lexus RX III facelift (2012-2015) main body ecu (behind left side of dash) Wiring diagrams

2 3 1 PR PNK WIRE 3 1 4 2 RH 4 3 PNK WIRE A/C AMPLIFIER ASSEMBLY (RIGHT SIDE OF DASH) A/C PRESSURE SENSOR (RIGHT SIDE OF ENGINE COMPT) AUTOMATIC LIGHT CONTROL SENSOR (TOP RIGHT SIDE OF DASH) BLK WIRE BLOWER W/ FAN MOTOR (RIGHT SIDE OF DASH) BLU WIRE BLW BRN WIRE CANH CANL SG-2 CLTB CLTE CLTS COMPUTER DATA LINES SYSTEM COOLER THERMISTOR (AMBIENT TEMPERATURE SENSOR) (FRONT OF ENGINE COMPT) DEFOGGER SYSTEM DFG DGS ECU-B 2 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE FDFI FUSE GRN WIRE GRY WIRE HEATER FUSE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) OF ENGINE COMPT) ORG/ WIRE PNK 1 2 3 4 5 6 7 8 9 10 11 12 13 IG+ WIRE PNK FDEF WIRE PNK WIRE PRE PNK WIRE RED WIRE RH TR SEATS SYSTEM SMOG VENTILATION SENSOR (IF EQUIPPED) (CENTER FRONT OF ENGINE COMPT) SOLAR SENSOR SVDB SVPB SVDS SVPS SW 1 TAM DGS TSL TSP TSD SG-1 TSR VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

+ECU 1 2 INTERIOR LIGHTS SYSTEM RCYL LSWR DOOR LOCKS SYSTEM 12 13 14 15 PKB FFGO TRLY HRLY HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM 24 25 26 27 28 29 30 31 32 GSW 5 6 PBDS TRUNK, TAILGATE, FUEL DOORS SYSTEM 8 7 CANP CANN 8 9 PNK CANN CANP WIRE ACTG ACT- ACT+ ACTD DOOR LOCKS SYSTEM ANTI-THEFT SYSTEM ANTI-THEFT SYSTEM DOOR LOCKS SYSTEM HEADLIGHTS SYSTEM BECU ALTB IG BLK WIRE BLU WIRE BRN WIRE D/L ALT B FUSE D/L SOURCE RELAY DMDR DMON INTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM ECU, SWITCH ASSEMBLY (LEFT SIDE OF DRIVER'S SEAT CUSHION) ECU- IG 1 FUSE ECU-B 1 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FRONT DOOR) FUSE GRN WIRE GRY WIRE HCTY BZR DIM IND HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM RLEW CANP CANN HORN HORNS SYSTEM HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START ILE FLCY FRCL FRCY LSWL 2 3 4 5 6 7 8 9 10 INSTRUMENT CLUSTER SYSTEM INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEFT FRONT POSITION CONTROL LEFT FRONT POWER WINDOW LEFT OUTER MIRROR CONTROL ECU ASSEMBLY (IN LEFT LEFT REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY (IN LEFT REAR DOOR) LIN LIN 1 LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY NAVIGATION SYSTEM EXTERIOR LIGHTS SYSTEM SFTP HZSW ORG/ WIRE PNK WIRE RED WIRE REGULATOR RIGHT FRONT POWER WINDOW RIGHT REAR POWER WINDOW REGULATOR SLIDING ROOF CONTROL ECU (CENTER FRONT OF ROOF) SUPPLEMENTAL RESTRAINTS SYSTEM VIO WIRE 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 (UNDER ASSEMBLY LEFT (BELOW SIDE OF CENTER DASH) CONSOLE) BLK WIRE BLU WIRE BRN WIRE CANL CANH DRL CANN CANP CERTIFICATION ECU ASSEMBLY (RIGHT SIDE OF DASH) CLTB CLTS CLTE COMBINATION METER ASSEMBLY CSPT DOMR DOOR LOCKS 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 LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) NAVIGATION RECEIVER ASSEMBLY ORG/ WIRE PNK FFOG WIRE PNK WIRE POWER MANAGEMENT CONTROL ECU (LEFT SIDE OF DASH) POWER STEERING ECU ASSEMBLY (LEFT END OF DASH) RADIO, DISPLAY RECEIVER ASSEMBLY RED WIRE SKID CONTROL ECU ASSEMBLY (RIGHT SIDE OF DASH) STEERING SENSOR (IN STEERING COLUMN) VIO WIRE W/ NAVIGATION W/O NAVIGATION WHT WIRE YAW RATE SENSOR ASSEMBLY (UNDER CENTER FLOOR CONSOLE) YEL WIRE

1 2 3 5 6 TSL TSR CLTE CLTS CLTB SOLAR SENSOR 17 3 HZSW 4 2 FRCY FLCY 6 28 29 30 20 21 22 13 14 3 RCTY AIR CONDITIONING SYSTEM AUTOMATIC LIGHT CONTROL SENSOR (TOP RIGHT SIDE OF DASH) BLK WIRE BLK/YEL WIRE BLU WIRE BRN WIRE CENTER STOP LIGHT ASSEMBLY COMPUTER DATA LINES SYSTEM D/L ALT B FUSE DCDC J/B ASSEMBLY FUSE (LEFT SIDE OF ENGINE COMPT) DEF DEF ECU-ACC FUSE ENGINE ROOM FRONT DOOR) FUSE GRN WIRE GRY WIRE HEAD TAIL CLTB CLTS CLTE CANL CANH HAZ HMSL HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) L/P LCTY LEFT "C" PILLAR) LEFT LICENSE PLATE LIGHT ASSEMBLY LEFT OUTER MIRROR CONTROL ECU ASSEMBLY (IN LEFT FRONT DOOR) LEFT OUTER REAR VIEW MIRROR ASSEMBLY (ON LEFT LEFT REAR COMBINATION LIGHT ASSEMBLY LEFT REAR RIGHT REAR SIDE MARKER SIDE MARKER LIGHT LIGHT ASSEMBLY ASSEMBLY LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) NCA WIRE NOISE FILTER (CENTER STOP LIGHT ASSEMBLY) (LEFT "D" PILLAR) RED WIRE RIGHT LICENSE PLATE LIGHT ASSEMBLY RIGHT REAR COMBINATION LIGHT ASSEMBLY STOP STP+ TAIL TAIL FUSE TAIL RELAY TRN+ TRNI TURN VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

21 20 BZR HCTY 4 2 5 FRCY FLCY LSWL SH 5 2 17 3 PBDS LSWR HZSW ACTG BLK WIRE BLK/ WHT WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM D DR UNLOCK RELAY D/L ALTB FUSE D/L SOURCE RELAY DETECTION DOOR CONTROL SWITCH ASSEMBLY DOOR LOCK RELAY DR UNLOCK RELAY ECU-ACC FUSE ECU-IGI 1 FUSE GRN WIRE GRY WIRE HEADLIGHTS SYSTEM HORN HORNS SYSTEM HOT AT ALL TIMES HOT W/ IND INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) KEY LCTY LEFT FRONT DOOR LOCK MOTOR (IN DRIVER'S DOOR) LOCK KEY LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) ORG/ WIRE PNK LSFL RCTY HAZ CANL CANH WIRE PNK WIRE RED WIRE RIGHT REAR DOOR COURTESY LIGHT SWITCH (AT RIGHT REAR "C" PILLAR) RIGHT REAR DOOR LOCK MOTOR (IN RIGHT REAR DOOR) UNLOCK VIO WIRE WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE YEL WIRE

23 24 PNK COMPUTER DATA LINES SYSTEM CANH CANL WIRE 4 1 3 SIG ES MPX PNK WIRE 40 26 19 24 IG IG PNK PNK WIRE ACAN AUTO BLK WIRE BLK/ WHT WIRE BLU WIRE BRN WIRE COMBINATION METER ASSEMBLY FR WASH FUSE FR WIP FUSE FRONT WASHER SWITCH FRONT WINDSHIELD WASHER MOTOR, PUMP ASSEMBLY (IN WASHER FLUID RESERVOIR) FRONT WIPER SWITCH FUSE GRN WIRE GRY WIRE HEADLIGHT CLEANER CONTROL RELAY (BELOW RIGHT HEADLIGHT ASSEMBLY) HOT IN ON OR START INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) J/C LEVEL WARNING SWITCH (IN WASHER FLUID RESERVOIR) LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) MIST OFF ORG/ WIRE OVERHEAD MODULE PNK FRWA WIRE RAIN SENSOR (CENTER FRONT OF ROOF) RED WIRE TAIL VIO WIRE WHT WIRE WHT/BLK WIRE WIG WINDSHIELD WIPER MOTOR ASSEMBLY (LEFT REAR OF ENGINE COMPT) WINDSHIELD WIPER SWITCH ASSEMBLY YEL WIRE

14 13 TRLY FFGO 15 22 HRLY DIM 15 8 5 30 28 29 27 22 21 20 DRL HF HU TAIL 2 4 11 FLCY FRCY 6 5 3 2 1 CLTB CLTS CLTE TSR TSL 9 10 8 21 CANP CANN RLEW LLEW AUTO TAIL OFF AUTOMATIC LIGHT CONTROL SENSOR (TOP RIGHT SIDE OF DASH) BLK WIRE BLU WIRE BRN WIRE CANADA USA COMPUTER DATA LINES SYSTEM D/L ALT B FUSE DIMMER SWITCH ECU-ACC FUSE ECU-B 1 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FOG LIGHT SWITCH FR FOG FUSE FR FOG RELAY FUSE GAUGE 2 FUSE GRN WIRE GRY WIRE HEAD HEAD FFOG CLTE CLTS CLTB PNK WIRE HEADLIGHT DIMMER SWITCH ASSEMBLY HOT AT ALL TIMES HOT W/ HOT W/ ACC 1 RELAY ENERGIZED INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LCTY INTERIOR LIGHTS SYSTEM RCTY LEFT FOG LIGHT ASSEMBLY LIGHT CONTROL SWITCH LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) ORG/ WIRE PARKING BRAKE SWITCH PD FUSE PNK WIRE RED WIRE RIGHT FOG LIGHT ASSEMBLY SOLAR SENSOR AIR CONDITIONING SYSTEM TAIL AUTO HEAD OFF DRL OFF DRL OFF TAIL FUSE TAIL RELAY VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

23 24 PNK CANH CANL WIRE 32 29 31 IG AUTO TAIL BLK WIRE BLU WIRE BRN WIRE COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM D/L ALT B FUSE ECU-ACC FUSE ECU-B 1 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FUSE GAUGE 2 FUSE GRN WIRE GRY WIRE HEAD HEAD CANL CANH HEADLIGHT DIMMER SWITCH ASSEMBLY HEADLIGHT LEVELING MOTOR HEADLIGHT SWIVEL ECU ASSEMBLY (LEFT END OF DASH) HOT AT ALL TIMES HOT W/ HOT W/ ACC 1 RELAY ENERGIZED INIT INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEFT HEADLIGHT ASSEMBLY LH - LHE LHM+ LHT RHT LIGHT CONTROL SWITCH LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) OFF RED WIRE RH+ CANH CANL RIGHT HEADLIGHT ASSEMBLY RIGHT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY (AT RIGHT REAR SUSPENSION) SBR SHRL SGR SHB SHG SHRR SMGL SMGR SMGR RHE VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

21 20 BZR HCTY 4 2 5 FRCY FLCY LSWL SH 5 2 17 3 PBDS LSWR HZSW ACTG BLK WIRE BLK/ WHT WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM D DR UNLOCK RELAY D/L ALTB FUSE D/L SOURCE RELAY DETECTION DOOR CONTROL SWITCH ASSEMBLY DOOR LOCK RELAY DR UNLOCK RELAY ECU-ACC FUSE ECU-IGI 1 FUSE GRN WIRE GRY WIRE HEADLIGHTS SYSTEM HORN HORNS SYSTEM HOT AT ALL TIMES HOT W/ IND INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) KEY LCTY LEFT FRONT DOOR LOCK MOTOR (IN DRIVER'S DOOR) LOCK KEY LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) ORG/ WIRE PNK LSFL RCTY HAZ CANL CANH WIRE PNK WIRE RED WIRE RIGHT REAR DOOR COURTESY LIGHT SWITCH (AT RIGHT REAR "C" PILLAR) RIGHT REAR DOOR LOCK MOTOR (IN RIGHT REAR DOOR) UNLOCK VIO WIRE WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BLU WIRE BRN WIRE BZR CANL CANH COMPUTER DATA LINES SYSTEM DRIVER SIDE AUTO SWITCH DRIVER SIDE DOWN SWITCH DRIVER SIDE UP SWITCH ECU-B 1 FUSE ECU-B 2 FUSE ENGINE ROOM R/B ASSEMBLY F/L DOOR FUSE FRONT PASSENGER SIDE CONTROL SWITCH GRN WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LED LEFT FRONT DOOR COURTESY LIGHT SWITCH (AT LEFT "B" PILLAR) LEFT FRONT DOOR W/ MOTOR LOCK ASSEMBLY LEFT FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (IN DRIVER'S DOOR) LEFT REAR SIDE CONTROL SWITCH LIN LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY ORG/ WIRE PNK WIRE RED WIRE RIGHT REAR SIDE CONTROL SWITCH VIO WIRE WHT WIRE WHT/BLK WIRE WINDOW LOCK SWITCH WIRELESS DOOR LOCK BUZZER (LEFT SIDE OF ENGINE COMPT) YEL WIRE