Lexus RX II (2003-2006) engine control module (behind right side of dash) Wiring diagrams

21 22 PNK WIRE 25 24 17 31 30 TRC+ ENG+ NEO TRC- ENG- 5 4 3 2 1 IG ABS 1 FUSE ABS 2 FUSE ECU-B FUSE ABS IND. BAT IG ESS CANH CANL BLK WIRE BLK/WHT WIRE BLU WIRE BRAKE IND BRN WIRE BS (RIGHT REAR OF CARGO AREA) CANH CANL TRC- COMBINATION METER ECU- IG 1 FUSE ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) FUSIBLE LINK BLOCK (IN ENGINE ROOM R/B) GAUGE 2 FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR START II (AT LEFT KICK PANEL) INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) J/B 2 (IN ENGINE ROOM R/B) J/B 3 (LEFT SIDE OF DASH) JUNCTION CONNECTOR 1 (IN ENGINE COMPT, ON RIGHT FRONT FENDER) JUNCTION CONNECTOR 22, 23, 24, 25, 26, 27 (RIGHT SIDE OF DASH) JUNCTION CONNECTOR 30, 31 (LEFT REAR OF VEHICLE) JUNCTION CONNECTOR 37 (AT REAR CARGO AREA) JUNCTION CONNECTOR 42 (REAR OF CARGO AREA) JUNCTION CONNECTOR 43, 44 (LEFT REAR CARGO AREA) LATE PRODUCTION W/ MAYDAY SYSTEM EARLY PRODUCTION, ALL W/O MAYDAY SYSTEM LT BLU WIRE LT GRN WIRE ORG/ WIRE PNK PNK WIRE PNK WIRE RED WIRE SIL SLIP IND SOLID STATE SPEEDOMETER TIRE PRESSURE IND TRACTION OFF IND VIO WIRE VSC IND VSC MTR 1 RELAY VSC MTR 2 RELAY WFSE WHT WIRE WHT/BLK WIRE YEL WIRE

2 1 32 ACMG HP TAM 9 8 23 RFC A/C AMBIENT TEMPERATURE SENSOR (BEHIND FRONT GRILLE) A/C MAGNETIC CLUTCH, LOCK SENSOR (ON A/C COMPRESSOR ASSEMBLY) BLK WIRE BLK/YEL WIRE BLOWER MOTOR (BEHIND RIGHT SIDE OF DASH) BLOWER MOTOR CONTROLLER (RIGHT SIDE OF DASH) BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE COOLING FAN ECU (LEFT FRONT OF ENGINE COMPARTMENT) DUAL EA (AT RIGHT SIDE OF ENGINE COMPT) ED (FRONT OF ENGINE) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (ON TOP FRONT OF ENGINE) FAN MAIN RELAY GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GRY WIRE HEATER FUSE HEATER RELAY R/B 3 (RIGHT SIDE OF ENGINE COMPT) HOT IN ON OR START IH (AT LEFT SIDE INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) J/B 2 (IN ENGINE ROOM R/B) JUNCTION CONNECTOR 17 (RIGHT SIDE OF DASH) JUNCTION CONNECTOR 7, 8 (BEHIND LEFT SIDE OF DASH) LCKI LT GRN WIRE MG/CLT RELAY OF DASH) JUNCTION CONNECTOR 6 (BEHIND LEFT SIDE OF DASH) ORG/ WIRE PNK WIRE PRESSURE SWITCH (RIGHT FRONT OF ENGINE COMPT) RED WIRE SINGLE SOLID STATE VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

ALT FUSE ALT-S FUSE BATTERY BATTERY GROUND BLU WIRE CHARGE INDICATOR COMBINATION METER COMPUTER DATA LINES EARLY PRODUCTION W/O LEXUS NAVIGATION SYSTEM ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) FUSIBLE LINK BLOCK (IN ENGINE ROOM R/B) GAUGE 1 FUSE GAUGE 2 FUSE GENERATOR IG GRY WIRE HOT IN ON OR START IK (TOP LEFT SIDE OF DASH) INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) J/B 3 (LEFT SIDE OF DASH) JUNCTION CONNECTOR 16 (RIGHT SIDE OF DASH) LATE PRODUCTION W/ LEXUS NAVIGATION SYSTEM MAIN FUSIBLE LINK NCA WIRE ORG/ WIRE PNK WIRE RED WIRE SYSTEM VIO WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE

18 19 20 SIL WFSE TC PNK WIRE 3 4 MPX+ MPX- 5 12 MPX+ MPX- 6 20 5 TC SIL TS A/C AMPLIFIER (RIGHT SIDE OF DASH) AFS ECU (IF EQUIPPED) AIR BAG SENSOR ASSEMBLY (BELOW CENTER CONSOLE) AUTO WIPER ECU (TOP RIGHT SIDE OF DASH) BLK WIRE BLU WIRE BODY ECU (BEHIND LEFT SIDE OF DASH) 24 12 22 BRN WIRE CENTER CLUSTER INTEGRATION PANEL COMBINATION METER DIA ED (FRONT OF ENGINE) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) GATEWAY ECU (RIGHT SIDE OF DASH) GRN WIRE GRY WIRE II (AT LEFT KICK PANEL) INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) J/B 3 (LEFT SIDE OF DASH) JUNCTION CONNECTOR 28, 29 (IN LEFT FRONT DOOR) JUNCTION CONNECTOR 30, 31 (LEFT REAR OF VEHICLE) JUNCTION CONNECTOR 45, 46 (IN DRIVER'S SEAT BOTTOM) LEFT REMOTE CONTROL MIRROR ECU (W/ DRIVING POSITION MEMORY) (IN LEFT FRONT DOOR) LT BLU WIRE LT GRN WIRE OCCUPANT CLASSIFICATION ECU (AT RIGHT FRONT SEAT) ORG/ WIRE PNK 6 7 WIRE PNK PNK PNK WIRE PNK WIRE POWER SEAT ECU (DRIVER'S SEAT) (W/ DRIVING POSITION MEMORY) POWER WINDOW MASTER SWITCH RED WIRE SIL SUSPENSION CONTROL ECU (UNDER RIGHT SIDE OF DASH) TRANSPONDER KEY COMPUTER (CENTER OF DASH) VIO WIRE W/ DRIVING POSITION MEMORY W/ NAVIGATION SYSTEM W/O NAVIGATION SYSTEM W/O POWER TILT, POWER TELESCOPIC WHT WIRE WHT/BLK WIRE YEL WIRE

9 8 RFC BLK WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE COOLING FAN ECU (LEFT FRONT OF ENGINE COMPT) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (ON TOP FRONT OF ENGINE) FAN MAIN RELAY FUSIBLE LINK BLOCK (IN ENGINE ROOM R/B) GRN WIRE GRN/BLK WIRE GRN/YEL WIRE HEATER FUSE HOT AT ALL TIMES HOT IN ON OR START IH (AT LEFT SIDE OF DASH) INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) J/B 2 (IN ENGINE ROOM R/B) JUNCTION CONNECTOR 6 (BEHIND LEFT SIDE OF DASH, JUNCTION CONNECTOR 7, 8 (BEHIND LEFT SIDE OF DASH) LT GRN WIRE PNK WIRE PRESSURE SWITCH (RIGHT FRONT OF ENGINE COMPT) RDI FAN FUSE SOLID STATE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE

+BM 17 18 29 24 10 19 12 6 SPD 25 11 10 9 8 23 22 12 CANL CANH NEO ENG+ TRC+ ENG- TRC- 28 18 17 3 2 29 19 1 4 7 PNK CCHG LGND WIRE 5 6 7 PNK WIRE ACCEL POSITION SENSOR (LEFT SIDE OF DASH, ON ACCELERATOR PEDAL) BLK WIRE BLK/RED WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM EE (REAR OF ED ENGINE) (FRONT OF ENGINE) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE CONTROLS SYSTEM ETCS FUSE FUSIBLE LINK BLOCK (IN ENGINE ROOM R/B) GAUGE 2 FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR START HOT IN ON OR START INSTRUMENT GAUGE 1 PANEL J/B FUSE (LEFT SIDE OF DASH) IGN FUSE J/B 3 (LEFT SIDE OF DASH) J/B 4 (RIGHT SIDE OF DASH) J/C 16 (RIGHT SIDE OF DASH) J/C 17 (RIGHT SIDE OF DASH) J/C 20, 21 (RIGHT SIDE OF DASH) J/C 7, 8 (BEHIND LEFT SIDE OF DASH) LT BLU WIRE LT GRN WIRE M+ M- ELC LCS NCA WIRE ORG/ WIRE PARK/ NEUTRAL POSITION SWITCH (ON TRANSAXLE) PNK CCS WIRE PNK PNK WIRE PNK WIRE RED WIRE RED/WHT WIRE STOP FUSE STOPLIGHT SWITCH THROTTLE POSITION SENSOR (ON THROTTLE BODY) VIO WIRE W/ MAYDAY SYSTEM LATE PRODUCTION W/O MAYDAY SYSTEM, ALL EARLY PRODUCTION WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE

+BM 17 18 29 24 10 19 12 6 SPD 19 9 20 18 22 28 26 23 29 27 PNK WFSE IGSW TC SIL VPA EPA VCPA WIRE ACCEL POSITION SENSOR (LEFT SIDE OF DASH, ON ACCELERATOR PEDAL) BLK WIRE BLK/RED WIRE BLU WIRE BLU/WHT WIRE BRN WIRE COMBINATION METER COMBINATION SWITCH COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE IND ED (FRONT OF ENGINE) EE (REAR OF ENGINE) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE CONTROLS SYSTEM ETCS FUSE FUSIBLE LINK BLOCK (IN ENGINE ROOM R/B) GAUGE 2 FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR START HOT IN ON OR START INSTRUMENT GAUGE 1 PANEL J/B FUSE (LEFT SIDE OF DASH) IGN FUSE IK (TOP LEFT SIDE OF DASH) INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) J/B 3 (LEFT SIDE OF DASH) J/B 4 (RIGHT SIDE OF DASH) J/C 16 (RIGHT SIDE OF DASH) J/C 17 (RIGHT SIDE OF DASH) J/C 20, 21 (RIGHT SIDE OF DASH) J/C 7, 8 (BEHIND LEFT SIDE OF DASH) LT BLU WIRE LT GRN WIRE M- M+ NCA WIRE ORG/ WIRE PARK/ NEUTRAL POSITION SWITCH (ON TRANSAXLE) PNK CCS WIRE PNK WFSE WIRE PNK WIRE RED WIRE RED/WHT WIRE RES/ ECC SET/ COAST SIL SKID CONTROL ECU WITH ACTUATOR (RIGHT FRONT OF ENGINE COMPT) SPEEDOMETER STOP FUSE STOPLIGHT SWITCH THROTTLE POSITION SENSOR (ON THROTTLE BODY) VIO WIRE W/ MAYDAY SYSTEM LATE PRODUCTION W/O MAYDAY SYSTEM, ALL EARLY PRODUCTION WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

3 1 2 RH+ LH+ ACCESS MODE LO AIR SUS RELAY AIRSUS FUSE BLK WIRE BLU WIRE BLU/BLK WIRE BRN WIRE BS (RIGHT REAR OF CARGO AREA) BT (BEHIND RIGHT SIDE OF REAR BUMPER) COMBINATION METER CONTROL SOLENOID VALVE DOME FUSE ECU- IG 1 FUSE EG (LEFT FRONT OF ENGINE COMPT) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE ROOM R/B (ON LEFT SIDE OF ENGINE COMPT) EXHAUST SOLENOID VALVE FUSIBLE LINK BLOCK (IN ENGINE ROOM R/B) GRN WIRE GRY WIRE HEIGHT CONTROL COMPRESSOR ASSEMBLY (LOWER RIGHT SIDE OF CARGO AREA) HEIGHT CONTROL OFF SWITCH HIGH CONTROL COMPRESSOR MOTOR HOT AT ALL TIMES HOT IN ON OR START IH (AT LEFT SIDE OF DASH) II (AT LEFT KICK PANEL) IJ (LEFT TOP OF DASH) IK (TOP LEFT SIDE OF DASH) INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) AIRSUS FUSE J/B 3 (LEFT SIDE OF DASH) J/B 4 (RIGHT SIDE OF DASH) J/C 13 (CENTER OF DASH) J/C 37 (AT REAR CARGO AREA) J/C 5 (LEFT FRONT OF ENGINE COMPT, BEHIND HEADLIGHT) J/C 6 (BEHIND LEFT SIDE OF DASH) J/C 7 (BEHIND LEFT SIDE OF DASH) LT GRN WIRE OFF HI ORG/ WIRE RED WIRE TACH TACHOMETER VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

4 3 2 1 TTLA AREA) BLK WIRE BLU WIRE BR (LEFT REAR CARGO AREA) BRN WIRE BS (RIGHT REAR OF CARGO AREA) COMBINATION METER CONVERTER TOWING ECU-B FUSE ECU-IG 2 FUSE ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) FUSIBLE LINK BLOCK (IN ENGINE ROOM R/B) GAUGE 1 FUSE GAUGE 2 FUSE GRN WIRE GRY WIRE HIGH MOUNTED STOP HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) J/B 3 (LEFT SIDE OF DASH) J/B 4 (RIGHT SIDE OF DASH) J/B ECU REAR J/B (LEFT REAR SIDE OF CARGO AREA) J/C 35 (LEFT REAR OF VEHICLE, BEHIND REAR BUMPER) J/C 36 J/C 37 (AT REAR CARGO AREA) J/C 40 (RIGHT REAR OF CARGO J/C 41 (RIGHT REAR OF CARGO AREA) J/C 42 J/C 7, 8 (BEHIND LEFT SIDE OF DASH) LEFT LEFT REAR STOP LIGHT SIDE MARKER LIGHT LEFT TAIL LIGHT LIGHT LIGHT LIGHT LT BLU WIRE LT GRN WIRE ORG/ WIRE PNK WIRE REAR LIGHT IND RIGHT LICENSE PLATE LEFT LICENSE PLATE RIGHT REAR SIDE MARKER LIGHT RIGHT STOP LIGHT RIGHT TAIL LIGHT SENSOR LIGHT FAILURE SHIFT LOCK ECU (UNDER CENTER CONSOLE, BESIDE SHIFT LEVER) SKID CONTROL ECU W/ ACTUATOR STOP FUSE STOP LIGHT SWITCH SUSPENSION CONTROL ECU (UNDER RIGHT SIDE OF DASH) TOWING FUSE TRAILER SOCKET TTRS TTLS VIO (OR GRY) WIRE VIO WIRE W/ DYNAMIC LASER CRUISE CONTROL W/ MAYDAY W/O DYNAMIC LASER CRUISE CONTROL W/O MAYDAY WHT WIRE WHT/BLK WIRE YEL WIRE

A/T OIL TEMP IND ABS IND. ACCESS MODE IND ACTIVE CIRCUIT AFS OFF IND ANTI-LOCK BRAKES SYSTEM ANTI-LOCK BRAKES SYSTEM HEADLIGHTS SYSTEM BACK DOOR IND BLK WIRE BLU WIRE BRAKE FLUID LEVEL WARNING BRAKE IND BRN WIRE BUZZER CHARGE IND COMBINATION METER COMPUTER DATA LINES SYSTEM CONNECTOR 38 CRUISE CHECK IND CRUISE IND DOME FUSE DOOR GRAPHIC IND DRIVER'S SEAT BELT IND ECT SNOW IND ECU-B FUSE ELECTRONIC SUSPENSION SYSTEM ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) EXCEPT MULTI-MODE SHIFT LEVER TYPE MULTI-MODE SHIFT LEVER TYPE 3 4 FUEL FUEL IND FUEL SENDER (MAIN) (ON TOP OF FUEL TANK) FUSIBLE LINK BLOCK GRN WIRE GRY WIRE HEAD IND HEADLIGHT BEAM LEVEL IND HEADLIGHTS SYSTEM HEIGHT CONTROL HEIGHT CONTROL HIGH IND HIGH BEAM IND HOT AT ALL TIMES HOT IN ON OR START IH (AT LEFT SIDE OF DASH) II (AT LEFT KICK PANEL) IK (TOP LEFT SIDE OF DASH) ILLUMINATION (RING) IN IND INSTRUMENT GAUGE 2 FUSE PANEL J/B (LEFT SIDE OF DASH) J/B 3 (LEFT SIDE OF DASH) JUNCTION CONNECTOR 6 LCD (ACC ODO/TRIP) LCD (SHIFT RANGE POSITION) LEFT REAR DOOR IND LEFT TURN IND LOW IND LT BLU WIRE LT GRN WIRE MAINT REQD IND MALFUNCTION IND LAMP MARK LEVINSON EXCEPT MARK LEVINSON MOPS MULTI-DISPLAY (IF EQUIPPED) NAVIGATION ECU (IF EQUIPPED) (AT REAR OF CARGO AREA) NAVIGATION SYSTEM EXTERIOR LIGHTS SYSTEM WIPER/WASHER SYSTEM NORMAL IND OFF IND OIL PRESSURE IND OIL PRESSURE SWITCH (ON LEFT FRONT CORNER OF ENGINE) ORG/ WIRE PNK EXTERIOR LIGHTS SYSTEM WIRE PNK WIRE POINTER ILLUMINATION POWER SUPPLY CIRCUIT READY IND REAR LIGHT IND RED WIRE RHEOSTAT TRIP SWITCH RIGHT TURN IND RSET SLIP IND SOLID STATE SPEEDOMETER SRS IND STEREO COMPONENT AMPLIFIER (CENTER REAR OF VEHICLE) SUSPENSION CONTROL ECU (UNDER RIGHT SIDE OF DASH) SWITCH (IN BRAKE FLUID RESERVOIR) TACH TACHOMETER TC RV TEMPERATURE TIRE AIR PRESSURE IND TRAC OFF IND USA VIO WIRE VSC IND W/ MAYDAY SYSTEM W/O MAYDAY SYSTEM WASHER LEVEL IND WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE