Toyota Highlander I (2001-2003) body ecu (behind right side of dash) Wiring diagrams

A/C MAGNETIC CLUTCH, LOCK SENSOR (ON A/C COMP- RESSOR) A/C TRIPLE PRESSURE SWITCH (ON RIGHT FRONT OF ENGINE COMPARTMENT) ACMG BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND RIGHT SIDE OF DASH) BRN WIRE CDS FUSE COMBINATION METER CONDENSER FAN MOTOR (BEHIND RADIATOR) DUAL EE (ON INTAKE SIDE OF CYLINDER BLOCK) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPARTMENT) ENGINE ROOM R/B (ON LEFT SIDE OF ENGINE COMPARTMENT) FAN FAN 1 RELAY FAN 2 RELAY FAN 3 RELAY FUSIBLE LINK BLOCK (ON LEFT SIDE OF ENGINE COMPARTMENT) GRN WIRE GRN/BLK WIRE GRY WIRE HOT AT ALL TIMES J/C 4 (ON RIGHT SIDE OF ENGINE COMPARTMENT) J/C 7 (BEHIND RIGHT SIDE OF DASH) MG CLT RELAY MPX PASSENGER SIDE J/B (BEHIND RIGHT SIDE OF DASH) POWER WINDOW MASTER SWITCH WITH ECU PRE RADIATOR FAN MOTOR (BEHIND RADIATOR) RDI FUSE RED WIRE RED/BLU WIRE RED/YEL WIRE SINGLE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/GRN WIRE YEL/RED WIRE

A/C MAGNETIC CLUTCH, LOCK SENSOR (ON A/C COMP- RESSOR) A/C TRIPLE PRESSURE SWITCH (ON RIGHT FRONT OF ENGINE COMPARTMENT) ACMG BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND RIGHT SIDE OF DASH) BRN WIRE COMBINATION METER CONDENSER FAN MOTOR (BEHIND RADIATOR) COOLING FAN DIODE (BEHIND LEFT SIDE OF DASH) DUAL ED (REAR SIDE OF SURGE TANK) EG (UNDER LEFT HEADLIGHT) EH (UNDER LEFT HEADLIGHT) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPARTMENT) ENGINE ROOM R/B (ON LEFT SIDE OF ENGINE COMPARTMENT) FAN 1 RELAY FAN 2 RELAY FAN 3 RELAY FUSIBLE LINK BLOCK (ON LEFT SIDE OF ENGINE COMPARTMENT) GRN WIRE GRN/BLK WIRE GRY WIRE HOT AT ALL TIMES J/C 2 (UNDER LEFT HEADLIGHT) J/C 4 (ON RIGHT SIDE OF ENGINE COMPARTMENT) J/C 7 (BEHIND RIGHT SIDE OF DASH) MG CLT RELAY MPX PASSENGER SIDE J/B (BEHIND RIGHT SIDE OF DASH) POWER WINDOW MASTER SWITCH WITH ECU PRE RADIATOR FAN MOTOR (BEHIND RADIATOR) RDI FUSE CDS FUSE RED WIRE RED/BLU WIRE RED/YEL WIRE SINGLE WATER TEMPERATURE SWITCH 1 (AT RIGHT FRONT OF ENGINE COMPARTMENT, BEHIND GRILLE) WATER TEMPERATURE SWITCH 2 (ON REAR CENTER OF ENGINE) WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/GRN WIRE YEL/RED WIRE

A/C MAGNETIC CLUTCH, LOCK SENSOR (ON A/C COMP- RESSOR) A/C TRIPLE PRESSURE SWITCH (ON RIGHT FRONT OF ENGINE COMPARTMENT) ACMG BLK WIRE BLK/ WHT WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND RIGHT SIDE OF DASH) BRN WIRE COMBINATION METER CONDENSER FAN MOTOR (BEHIND RADIATOR) COOLING FAN DIODE (BEHIND LEFT SIDE OF DASH) DUAL ED (REAR SIDE OF SURGE TANK) EG (UNDER LEFT HEADLIGHT) EH (UNDER LEFT HEADLIGHT) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPARTMENT) ENGINE ROOM R/B (ON LEFT SIDE OF ENGINE COMPARTMENT) FAN 1 RELAY FAN 2 RELAY FAN 3 RELAY FUSIBLE LINK BLOCK (ON LEFT SIDE OF ENGINE COMPARTMENT) GRN WIRE GRN/BLK WIRE GRY WIRE HOT AT ALL TIMES J/C 2 (UNDER LEFT HEADLIGHT) J/C 4 (ON RIGHT SIDE OF ENGINE COMPARTMENT) J/C 7 (BEHIND RIGHT SIDE OF DASH) MG CLT RELAY MPX PASSENGER SIDE J/B (BEHIND RIGHT SIDE OF DASH) POWER WINDOW MASTER SWITCH WITH ECU PRE RADIATOR FAN MOTOR (BEHIND RADIATOR) RDI FUSE CDS FUSE RED WIRE RED/BLU WIRE RED/YEL WIRE SINGLE WATER TEMPERATURE SWITCH 1 (AT RIGHT FRONT OF ENGINE COMPARTMENT, BEHIND GRILLE) WATER TEMPERATURE SWITCH 2 (ON REAR CENTER OF ENGINE) WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/GRN WIRE YEL/RED WIRE

ACT+ ACTD 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 ANTI-THEFT, DOOR LOCKS SYSTEMS BECU HORN ILE PCYL BLK WIRE BLK/ORG WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND RIGHT SIDE OF DASH) BRN/WHT WIRE CENTER J/B (BEHIND UPPER CENTER OF DASH) CLTB DCTY DCYL DFR DOOR FUSE DOOR LOCK FUSE DOOR LOCKS SYSTEM ECU-B FUSE ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPARTMENT) EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM FUSE GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HAZ CLTE CLTS HEAD TAIL INTERIOR, EXTERIOR LIGHTS SYSTEMS HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM FFOG LSWP PMUL PKUL HU HF HEADLIGHTS SYSTEM HEADLIGHTS, ANTI-THEFT SYSTEMS DRL HRLY PBKL DBKL BCTY HORNS SYSTEM INTERIOR LIGHTS SYSTEM HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START IG FFGO TRLY INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) INTERIOR LIGHTS, DOOR LOCKS, ANTI-THEFT SYSTEMS J/C 12 (ON LEFT REAR OF VEHICLE) J/C 6 (LEFT SIDE OF DASH, BEHIND COMBINATION METER) LEFT FRONT DOOR COURTESY LIGHT LEFT FRONT DOOR COURTESY SWITCH LEFT REAR DOOR COURTESY SWITCH LT GRN WIRE LT GRN/BLK WIRE PARKING BRAKE SWITCH PASSENGER SIDE J/B (BEHIND RIGHT SIDE OF DASH) PD PU POWER WINDOWS SYSTEM PFR DOOR FUSE PKB RCTY PCTY LSWA PNK PML PKL ANTI-THEFT, DOOR LOCKS SYSTEMS WIRE PNK/BLU WIRE RADIO 2 FUSE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR COURTESY LIGHT RIGHT FRONT DOOR COURTESY SWITCH RIGHT REAR DOOR COURTESY SWITCH RLD RLU BZR RDA PRG POWER WINDOWS SYSTEM RRD RRU POWER WINDOWS SYSTEM SNOW SUPPLEMENTAL RESTRAINTS, WARNING SYSTEMS TRANSMISSIONS SYSTEM UNLOCK WARNING SWITCH VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/RED WIRE

2.4L 3.0L A/C CONTROL SWITCH MPX+ AIR BAG SENSOR ASSEMBLY (BELOW SHIFTER CONSOLE) BLK WIRE BLK/ORG WIRE BLU/WHT WIRE BODY ECU (BEHIND RIGHT SIDE OF DASH) BRN WIRE C/C COMBINATION METER CRUISE CONTROL ECU (BEHIND LEFT SIDE OF DASH) D/G DATA LINK CONNECTOR 3 (UNDER LEFT SIDE OF DASH) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) HOT AT ALL TIMES IC (UPPER RIGHT KICK PANEL) INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/C 6 (LEFT SIDE OF DASH, BEHIND COMBINATION METER) J/C 7 (BEHIND RIGHT SIDE OF DASH) MPX OBD FUSE OPTION CONNECTOR 1 (BEHIND LEFT KICK PANEL) PASSENGER SIDE J/B (BEHIND RIGHT SIDE OF DASH) PNK/BLK WIRE PNK/BLU WIRE POWER WINDOW MASTER SWITCH W/ ECU RED/BLU WIRE SIL SKID CONTROL ECU (ABOVE INSTRUMENT PANEL J/B) SLIDING ROOF CONTROL ECU (ON FRONT OF SLIDING ROOF) THEFT DETERRENT ECU (BEHIND RIGHT SIDE OF DASH) W/ VSC W/O VSC W/O THEFT DETERRENT WFSE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 IG LR LL BC (LEFT SIDE OF CROSSMEMBER) BLK WIRE BLU WIRE BODY ECU (BEHIND RIGHT SIDE OF DASH) CENTER PANEL J/B (BEHIND UPPER CENTER OF DASH) COMBINATION METER EL ER ENGINE ROOM J/B (ON LEFT SIDE OF ENG COMPT) FUSE FUSIBLE LINK BLOCK (ON LEFT SIDE OF ENGINE COMPT) ALT FUSE GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HAZARD FUSE HAZARD SWITCH (A/C CONTROL ASSEMBLY) HEAD OFF TAIL HIGH MOUNTED STOP LIGHT HOT AT ALL TIMES HOT IN ON OR START IA (LEFT KICK PANEL) IB (RIGHT INSTRUMENT PANEL BRACE) INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/C 1 (UNDER LEFT HEADLIGHT) J/C 11 (ON RIGHT REAR OF VEHICLE) J/C 12 (ON LEFT REAR OF VEHICLE) J/C 13 (LEFT REAR OF VEHICLE) J/C 14 (LEFT SIDE OF BACK DOOR) J/C 3 (ON RIGHT FRONT CORNER OF ENG COMPT) J/C 3 (RIGHT SIDE OF ENG COMPT) LEFT FRONT PARK/ TURN LIGHT LEFT REAR COMBIN- ATION LIGHT LEFT REAR SIDE MARKER LIGHT LH RH LICENSE PLATE LIGHT LIGHT CONTROL SWITCH (PART OF COMBINATION SWITCH) PASSENGER SIDE J/B (BEHIND RIGHT SIDE OF DASH) RED WIRE RED/BLK WIRE RED/BLU WIRE RIGHT FRONT PARK/ TURN LIGHT RIGHT REAR COMBIN- ATION LIGHT RIGHT REAR SIDE MARKER LIGHT STOP STOP FUSE STOP- LIGHT SWITCH (ABOVE BRAKE PEDAL) TAIL TAIL FUSE TAIL STOP TURN TAIL TURN TAILLIGHT RELAY TURN SIGNAL FLASHER (RIGHT OF INSTRUMENT PANEL J/B) TURN SIGNAL INDICATOR LIGHTS W/ TRAILER TOW W/O TRAILER TOW WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE

2.4L ENGINE 3.0L ENGINE BACK DOOR KEY LOCK, UNLOCK SWITCH BLK/ORG WIRE BLU WIRE BODY ECU (BEHIND RIGHT SIDE OF DASH) BRN/WHT WIRE CENTER J/B CENTER J/B (BEHIND UPPER CENTER OF DASH) COMPUTER DATA LINES SYSTEM CPUB DSWH IOUT ECU-B FUSE ECU-IG FUSE ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE HOOD COURTESY SWITCH (ON FRONT CENTER OF ENGINE COMPT) ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPT) GRN/BLK WIRE HOT AT ALL TIMES HOT IN ON OR START IB (RIGHT INSTRUMENT PANEL BRACE) IC (UPPER RIGHT KICK PANEL) IMLD IND INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) IOUT J/C 1 (UNDER LEFT HEADLIGHT) J/C 14 (LEFT SIDE OF BACK DOOR) J/C 6 (LEFT SIDE OF DASH, BEHIND INSTRUMENT CLUSTER) LT GRN WIRE OPTION CONNECTOR 2 (BEHIND UPPER RIGHT SIDE OF DASH) PASSENGER SIDE J/B (BEHIND RIGHT SIDE OF DASH) POWER WINDOW MASTER SWITCH W/ ECU RED/BLK WIRE RED/BLU WIRE SECURITY FUSE SH SH- THEFT DETERRENT ECU (BEHIND RIGHT SIDE OF DASH) THEFT DETERRENT HORN (ON RIGHT SIDE OF ENGINE COMPT) THEFT DETERRENT INDICATOR LIGHT UNLOCK WARNING SWITCH WHT/BLK WIRE WHT/BLU WIRE YEL/BLK WIRE YEL/RED WIRE

10 17 16 18 15 14 FFOG HEAD 12 20 21 1 3 4 CLTB CLTE CLTS 2 3 PNK DRL HRLY WIRE 9 14 7 BECU PKB ALT FUSE AUTO OFF AUTOMATIC LIGHT CONTROL SENSOR (UPPER LEFT SIDE OF DASH) BLK WIRE BLK/ORG WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND RIGHT SIDE OF DASH) BRN WIRE BRN/WHT WIRE CENTER J/B (BEHIND CENTER OF DASH) COMBINATION METER COMBINATION SWITCH DCTY DIMMER SWITCH DRL 2 RELAY DRL 3 RELAY DRL 4 RELAY DRL FUSE EA (RIGHT FRONT OF ENGINE COMPT) EB (FRONT OF RIGHT FRONT FENDER) ECU-B FUSE EG (UNDER LEFT HEADLAMP) ENGINE ROOM J/B (LEFT SIDE OF ENGINE COMPT) ENGINE ROOM R/B (LEFT SIDE OF ENGINE COMPT) FLASH AUTO OFF FOG LIGHT RELAY FOGLIGHT SWITCH FR FOG FUSE FUSE FUSIBLE LINK BOX (LEFT SIDE OF ENGINE COMPT) GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLU WIRE HEAD LP LH LWR FUSE HEAD LP LH UPR FUSE HEAD LP RH LWR FUSE HEAD LP RH UPR FUSE HEADLAMP RELAY HIGH BEAM INDICATOR HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START IA (LEFT KICK PANEL) IC (UPPER RIGHT KICK PANEL) IG TRLY FFOG INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) RADIO 2 FUSE J/C 1 J/C 3 LEFT FRONT DOOR COURTESY SWITCH LEFT HIGH BEAM HEADLIGHT LEFT LOW BEAM HEAD- LIGHT LEFT FOG LIGHT LIGHT CONTROL SWITCH LOW LOW FLASH LT GRN WIRE MAIN FUSE OFF ON ORG/ WIRE PARKING BRAKE SWITCH PASSENGER SIDE J/B (BEHIND RIGHT SIDE OF DASH) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FOG LIGHT RIGHT HIGH BEAM HEADLIGHT RIGHT LOW BEAM HEAD- LIGHT TAIL FUSE TAIL HF HU TAIL LIGHT RELAY WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

14 17 18 15 10 HU HEAD TAIL HF FFOG 9 7 BECU ALT FUSE BLK WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BODY ECU (BEHIND RIGHT SIDE OF DASH) BRN WIRE BRN/WHT WIRE CENTER J/B (BEHIND CENTER OF DASH) COMBINATION METER COMBINATION SWITCH DCTY DIMMER SWITCH LIGHT CONTROL SWITCH EA (RIGHT FRONT OF ENGINE COMPT) ECU-B FUSE EG (UNDER LEFT HEADLAMP) ENGINE ROOM J/B (LEFT SIDE OF ENGINE COMPT) ENGINE ROOM R/B (LEFT SIDE OF ENGINE COMPT) FOG LIGHT RELAY FOGLIGHT SWITCH FR FOG FUSE FUSE FUSIBLE LINK BOX (LEFT SIDE OF ENGINE COMPT) GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HEAD LOW FLASH OFF HEAD LP LH LWR FUSE HEAD LP LH UPR FUSE HEAD LP RH UPR FUSE HEAD LP RH LWR FUSE HEAD OFF HEADLAMP RELAY HIGH BEAM INDICATOR HIGH TAIL HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START IA (LEFT KICK PANEL) IC (UPPER RIGHT KICK PANEL) IG TRLY FFOG INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) RADIO 2 FUSE J/C 1 J/C 3 LEFT FOG LIGHT LEFT FRONT DOOR COURTESY SWITCH LEFT LOW BEAM HEAD- LIGHT LOW FLASH MAIN FUSE OFF ON PASSENGER SIDE J/B (BEHIND RIGHT SIDE OF DASH) RED WIRE RED/BLU WIRE RED/WHT WIRE RIGHT FOG LIGHT RIGHT HIGH BEAM HEAD- LIGHT LEFT HIGH BEAM HEAD- LIGHT RIGHT LOW BEAM HEAD- LIGHT TAIL TAIL FUSE TAIL LIGHT RELAY WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE

+B STP RT 1 2 3 4 5 6 7 8 9 10 TL LT/S TAIL LT GND RT/S BC (LEFT SIDE OF REAR CROSSMEMBER) BLK WIRE BLU WIRE BODY ECU (BEHIND RIGHT SIDE OF DASH) CENTER PANEL J/B (BEHIND UPPER CENTER OF DASH) ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPT) FUSE GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HAZARD FUSE HAZARD SWITCH (A/C CONTROL ASSEMBLY) HOT AT ALL TIMES HOT IN ON OR START HOT W/ LIGHT CONTROL SWITCH IN HEAD OR PARK IA (LEFT KICK PANEL) INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/C 10 (ON LEFT REAR OF VEHICLE) J/C 12 (LEFT REAR OF VEHICLE) J/C 13 (ON LEFT REAR OF VEHICLE) J/C 3 (ON RIGHT SIDE OF ENG COMPT) LR HAZ PASSENGER SIDE J/B (BEHIND RIGHT SIDE OF DASH) RED WIRE RED/BLK WIRE RED/WHT WIRE STOP FUSE STOP- LIGHT SWITCH (ABOVE BRAKE PEDAL) TAIL FUSE TOWING FUSE TRAILER CONVERTER (LEFT SIDE OF OF CARGO AREA, BEHIND TRIM) TRAILER HITCH (BEHIND LEFT SIDE OF REAR BUMPER) TURN SIGNAL FLASHER (BEHIND LEFT END OF DASH) TURN SIGNAL SWITCH (PART OF COMBO SWITCH) WHT WIRE WHT/BLK WIRE YEL WIRE