Radio circuit, w/ built-in amplifier (1 of 4)
Radio circuit, w/ built-in amplifier (1 of 4)
Radio circuit, w/ separate amplifier (1 of 7)
Radio circuit, w/ separate amplifier (1 of 7)
Computer data lines circuit, except hybrid (1 of 3)
Computer data lines circuit, except hybrid (1 of 3)
Computer data lines circuit, hybrid (1 of 3)
Computer data lines circuit, hybrid (1 of 3)
Supplemental restraints circuit (1 of 3)
Supplemental restraints circuit (1 of 3)
Memory mirrors circuit (1 of 2)
Memory mirrors circuit (1 of 2)
Memory seat circuit (1 of 2)
Memory seat circuit (1 of 2)
Automatic a/c circuit, hybrid (1 of 4)
Automatic a/c circuit, hybrid (1 of 4)
Automatic a/c circuit, except hybrid (1 of 4)
Automatic a/c circuit, except hybrid (1 of 4)
Ground distribution circuit (1 of 9)
Ground distribution circuit (1 of 9)

Wiring Diagrams for Toyota Highlander IV (2019-2024)

  • Description:
    Engines: 2.5L HYBRID, 3.5L
  • Systems: 216 Components: 1922
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A/C EVAPORATOR TEMPERATURE SENSOR A/C PRESSURE SENSOR ACCELERATOR PEDAL SENSOR ASSEMBLY AIR BAG SENSOR ASSEMBLY AUTOMATIC LIGHT CONTROL SENSOR BATTERY STATE SENSOR ASSEMBLY BATTERY VOLTAGE SENSOR BRAKE PEDAL STROKE SENSOR ASSEMBLY CRANK POSITION SENSOR CURRENT SENSOR EFI VACUUM SENSOR ASSEMBLY ENGINE COOLANT TEMPERATURE SENSOR ENGINE COOLANT TEMPERATURE SENSOR 2 ENGINE OIL LEVEL SENSOR FRONT IN WEIGHT DETECTION SENSOR SUB ASSEMBLY HORIZONTAL SENSOR KICK DOOR CONTROL SENSOR LEFT BLIND SPOT MONITOR SENSOR LEFT DOOR SIDE AIR BAG SENSOR LEFT FRONT AIR BAG SENSOR LEFT FRONT CENTER ULTRASONIC SENSOR LEFT FRONT CORNER ULTRASONIC SENSOR LEFT FRONT SPEED SENSOR LEFT FRONT SPEED SENSOR SHIELD LEFT POWER BACK DOOR SENSOR ASSEMBLY LEFT REAR CENTER ULTRASONIC SENSOR LEFT REAR CORNER ULTRASONIC SENSOR LEFT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY LEFT SIDE AIR BAG SENSOR ASSEMBLY LEFT SIDE AIR BAG SENSOR ASSEMBLY 2 MILLIMETER WAVE RADAR SENSOR ASSEMBLY OIL PRESSURE/ TEMPERATURE SENSOR RAIN SENSOR REAR IN WEIGHT DETECTION SENSOR SUB ASSEMBLY RIGHT BLIND SPOT MONITOR SENSOR RIGHT DOOR SIDE AIR BAG SENSOR RIGHT FRONT AIR BAG SENSOR RIGHT FRONT CENTER ULTRASONIC SENSOR RIGHT FRONT CORNER ULTRASONIC SENSOR RIGHT FRONT SPEED SENSOR RIGHT FRONT SPEED SENSOR SHIELD RIGHT POWER BACK DOOR SENSOR ASSEMBLY RIGHT REAR CENTER ULTRASONIC SENSOR RIGHT REAR CORNER ULTRASONIC SENSOR RIGHT SIDE AIR BAG SENSOR ASSEMBLY RIGHT SIDE AIR BAG SENSOR ASSEMBLY 2 SHIFT LEVER POSITION SENSOR STEERING SENSOR TEMPERATURE SENSOR TORQUE SENSOR TRANSMISSION REVOLUTION SENSOR VACUUM SENSOR ASSEMBLY VAPOR PRESSURE SENSOR VERTICAL SENSOR YAW RATE SENSOR

ALL WHEEL DRIVE POSITION SWITCH 1 ALL WHEEL DRIVE POSITION SWITCH 2 AUTO HIGH BEAM SWITCH BACK DOOR LOCK ASSEMBLY W/ COURTESY LIGHT SWITCH BACK DOOR OPENER SWITCH ASSEMBLY BRAKE PEDAL LOAD SENSING SWITCH ASSEMBLY BUCKLE SWITCH COURTESY SWITCH DIMMER SWITCH DOOR CONTROL SWITCH DOOR CONTROL SWITCH ASSEMBLY DOWNHILL ASSIST CONTROL SWITCH DRIVER SIDE AUTO SWITCH DRIVER SIDE DOWN SWITCH DRIVER SIDE UP SWITCH ECO RUN CANCEL SWITCH ASSEMBLY ELECTRIC PARKING BRAKE SWITCH ASSEMBLY END SHAFT SWITCH ENGINE OIL PRESSURE SWITCH ASSEMBLY ENGINE SWITCH FRONT PASSENGER SIDE CONTROL SWITCH FRONT SEAT HEATER SWITCH FRONT VERTICAL SWITCH FRONT WIDE VIEW SWITCH FRONT WIPER DEICER SWITCH FRONT WIPER SWITCH FUEL LID OPENER SWITCH HAZARD WARNING SIGNAL SWITCH ASSEMBLY HEADLIGHT DIMMER SWITCH ASSEMBLY HOLD SWITCH HORN SWITCH LEFT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY LEFT FRONT POWER SEAT SWITCH LEFT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY LEFT REAR SIDE CONTROL SWITCH LEFT STEERING PAD SWITCH LEFT STEERING PAD SWITCH STEERING PAD SWITCH ASSEMBLY LIFTER SWITCH LIGHT CONTROL SWITCH LOCK SWITCH LUMBAR SWITCH MAIN SWITCH ASSEMBLY MIRROR ADJUST SWITCH MIRROR HEATER SWITCH, REAR WINDOW DEFOGGER SWITCH MIRROR HEATER SWITCH, REAR WINDOW DEFOGGER SWITCH, FRONT SEAT HEATER SWITCH OUTER MIRROR SWITCH ASSEMBLY P POSITION DETECTION SWITCH PARK/ NEUTRAL POSITION SWITCH ASSEMBLY PARK/NEUTRAL POSITION SWITCH ASSEMBLY PATTERN SELECT SWITCH PATTERN SELECT SWITCH ASSEMBLY POWER BACK DOOR CONTROL SWITCH POWER BACK DOOR CONTROL SWITCH 1 REAR SEAT HEATER SWITCH REAR WIPER SWITCH RECLINING SWITCH RELEASE SWITCH RIGHT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY RIGHT FRONT POWER SEAT SWITCH RIGHT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY RIGHT REAR SIDE CONTROL SWITCH RIGHT STEERING PAD SWITCH SEAT MEMORY SWITCH SELECT SWITCH SLIDE SWITCH SOS SWITCH STEERING HEATER SWITCH STEERING PAD SWITCH ASSEMBLY STOP LIGHT SWITCH ASSEMBLY TRIP SWITCH TURN SIGNAL SWITCH VACUUM WARNING SWITCH ASSEMBLY VOLUME SWITCH VSC OFF SWITCH WASHER SWITCH WINDOW LOCK SWITCH WINDSHIELD WIPER SWITCH ASSEMBLY

2.5L HYBRID 3.5L 5 OF 9) (DIAGRAM (OR (REAR OF LEFT +BM +BWP +SM +UM -DP -WR A/C CONTROL ASSEMBLY A/C CONTROL ASSEMBLY 2 A/C RADIATOR DAMPER SERVO SUB-ASSEMBLY 1 A/C RADIATOR DAMPER SERVO SUB-ASSEMBLY 2 A/C THERMISTOR ASSEMBLY A/T CIRCUIT AIR CONDITIONING SYSTEM AIR CONDITIONING, WIPER/WASHER SYSTEMS AUTO TAIL B+ BUS BACKUP LAMPS CIRCUIT BACKUP, TAIL BBL+ BBR+ BCB+ BCL+ BCR+ BCV- BD+2 BD- BD-2 BDL- BEHIND LEFT QUARTERPANEL) BEHIND RIGHT FRONT CORNER OF FRONT BUMPER) BFB- BFL+ BFR+ BIN 2 BLOWER ASSEMBLY BLOWER DAMPER SERVO SUB-ASSEMBLY 1 BRAKE MASTER CYLINDER SUB-ASSEMBLY BSL+ BSL+ LCV- LCV+ LCB+ BSR+ BUS - BUS G BZR 16 4 CA+ CAN JUNCTION TERMINAL 1 CAN JUNCTION TERMINAL 2 CAN P CAN-N CANH EP CANL CANH CB+ CCA- CCB- CDL+ CDR+ CEB+ CENTER BUSBAR MODULE CENTER CONSOLE CENTER REAR SEAT INNER BELT ASSEMBLY CENTER STOP LIGHT ASSEMBLY CEV+ SHIELD SGND CEV- CEV- SGND CHARGING SYSTEM CI OA CLEARANCE WARNING BUZZER 1 CLEARANCE WARNING BUZZER 2 COMBINATION METER ASSEMBLY COMPRESSOR W/ PULLEY ASSEMBLY COMPUTER DATA LINES SYSTEM CONTROL ASSEMBLY CONTROL CIRCUIT COOLING FANS SYSTEM CSW+ CV+ DATA LINES DC- DEFOGGER SYSTEM DIRECT FUEL INJECTOR ASSEMBLY 1 DIRECT FUEL INJECTOR ASSEMBLY 1 SHIELD DIRECT FUEL INJECTOR ASSEMBLY 2 DIRECT FUEL INJECTOR ASSEMBLY 2 SHIELD DIRECT FUEL INJECTOR ASSEMBLY 3 DIRECT FUEL INJECTOR ASSEMBLY 3 SHIELD DIRECT FUEL INJECTOR ASSEMBLY 4 DIRECT FUEL INJECTOR ASSEMBLY 4 SHIELD DIRECT FUEL INJECTOR ASSEMBLY 5 DIRECT FUEL INJECTOR ASSEMBLY 5 SHIELD DIRECT FUEL INJECTOR ASSEMBLY 6 DIRECT FUEL INJECTOR ASSEMBLY 6 SHIELD DK+ DMS- DOOR CONTROL DOOR LOCKS SYSTEM DOOR LOCKS, ANTI-THEFT SYSTEMS DOOR LOCKS, TRUNK, TAILGATE, FUEL DOORS SYSTEMS DOWN RIGHT DRIVE MODE DRL OFF ECM SHIELD ECO RUN VEHICLE CONVERTER ASSEMBLY EGA+ EGB- ELECTRONIC POWER STEERING SYSTEM EMP+ ETM- EV TRAIL MODE EX+ EXCEPT HYBRID FCP+ FLOOR J/B 5 FLOOR R/B 5 FP- FROM GROUND FROM GROUND HA FROM GROUND HB FRV- FSV- FSW+ FUEL SENDER GLOVE BOX LIGHT ASSEMBLY GND BSR+ GV- GVI- GVO+ HALL IC 1 HALL IC 2 HALL IC FUEL SENDER HC (DIAGRAM HEADLIGHTS SYSTEM HORNS SYSTEM HOT AT ALL TIMES HOT AT ALL TIMES FLOOR J/B 5 HOT W/ HYBRID VEHICLE TRANSAXLE ASSEMBLY ICL- ICR+ ILL- VR HR INNER REAR VIEW MIRROR ASSEMBLY INSTRUMENT PANEL J/B ASSEMBLY INSTRUMENT PANEL PASSENGER AIR BAG W/O DOOR ASSEMBLY INTAKE MASS AIR FLOW METER SUB-ASSEMBLY INTEGRATED CONTROL SUB- ASSEMBLY INTEGRATION CONTROL SUB-ASSEMBLY INTERIOR ILLUMINATION LIGHT ASSEMBLY 1 INTERIOR ILLUMINATION LIGHT ASSEMBLY 2 INVERTER W/ CONVERTER ASSEMBLY KEY UNLOCK L OFF LCB+ LCV- LEFT BUSBAR MODULE LEFT COURTESY LIGHT ASSEMBLY LEFT CURTAIN SHIELD AIR BAG ASSEMBLY LEFT FOG LIGHT ASSEMBLY LEFT FRONT DOOR OUTSIDE HANDLE ASSEMBLY LEFT FRONT SEAT AIR BAG ASSEMBLY LEFT FRONT SEAT INNER BELT ASSEMBLY LEFT LICENSE PLATE LIGHT ASSEMBLY LEFT OUTER REAR VIEW MIRROR ASSEMBLY LEFT REAR AXLE HUB, BEARING ASSEMBLY SHIELD LEFT REAR COMBINATION LIGHT ASSEMBLY LEFT REAR LIGHT ASSEMBLY LEFT REAR SEAT INNER BELT ASSEMBLY LEFT REAR SEAT INNER BELT ASSEMBLY 2 LEFT RIGHT LEFT SEAT BACK CLIMATE CONTROL BLOWER LEFT SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY LEFT SPOT LIGHT ASSEMBLY LEFT VANITY LIGHT ASSEMBLY LEFT VISOR ASSEMBLY LFT- LIGHT IC LOW/HIGH DRL LOWER INSTRUMENT PANEL AIR BAG ASSEMBLY 1 LSP + M+ MV M+ VL MAGNET CLUTCH ASSEMBLY MAIN BOARD MAIN BOARD GND MAIN BOARD ROOF CONSOLE BOX ASSEMBLY MAIN FUSIBLE LINK MCI- MCO- MEMORY SYSTEMS METER MIRROR SUB-ASSEMBLY MG+ MI+ MI- SHIELD SLDI MIC - MICROPHONE CASE 1 MO- MO- SHIELD SLDO MOBILE WIRELESS CHARGER CRADLE ASSEMBLY MOP+ MRL+ MSM+ MUD, MULTI- DISPLAY ASSEMBLY NAVIGATION SYSTEM NAVIGATION, SOUND SYSTEMS NE+ NOT USED NOT USED NOT USED P-AB PASSENGER AIR BAG ON/OFF IND PCB CP PL- PORT FUEL INJECTOR ASSEMBLY 1 PORT FUEL INJECTOR ASSEMBLY 2 PORT FUEL INJECTOR ASSEMBLY 3 PORT FUEL INJECTOR ASSEMBLY 4 PORT FUEL INJECTOR ASSEMBLY 5 PORT FUEL INJECTOR ASSEMBLY 6 POWER BACK DOOR WARNING BUZZER POWER DISTRIBUTION SYSTEM POWER WINDOWS SYSTEM PPL BLGD PPL BRGD PPL GND PR- PRETENSIONER LEFT FRONT SEAT OUTER BELT ASSEMBLY PTC 1 PTC 2 + PTC 3 + PUDDLE LIGHT PURGE VSV R-U R-V R-W R/B 7 RADIATOR SHUTTER SUB- ASSEMBLY RADIO RECEIVER ASSEMBLY RADIO SETTING CONDENSER RADIO, DISPLAY RECEIVER ASSEMBLY RCB+ RCL- RIGHT BUSBAR MODULE RIGHT COURTESY LIGHT ASSEMBLY RIGHT CURTAIN SHIELD AIR BAG ASSEMBLY RIGHT END OF DASH) RIGHT FOG LIGHT ASSEMBLY RIGHT FRONT DOOR OUTSIDE HANDLE ASSEMBLY RIGHT FRONT SEAT AIR BAG ASSEMBLY RIGHT FRONT SEAT CUSHION AIR BAG ASSEMBLY RIGHT FRONT SEAT INNER BELT ASSEMBLY RIGHT FRONT SEAT OUTER BELT ASSEMBLY RIGHT LICENSE PLATE LIGHT ASSEMBLY RIGHT OUTER REAR VIEW MIRROR ASSEMBLY RIGHT QUARTER PANEL RIGHT REAR AXLE HUB, BEARING ASSEMBLY SHIELD RIGHT REAR COMBINATION LIGHT ASSEMBLY RIGHT REAR LIGHT ASSEMBLY RIGHT REAR SEAT INNER BELT ASSEMBLY RIGHT SEAT BACK CLIMATE CONTROL BLOWER RIGHT SEAT CUSHION CLIMATE CONTROL BLOWER ASSEMBLY RIGHT SPOT LIGHT ASSEMBLY RIGHT VANITY LIGHT ASSEMBLY RIGHT VISOR ASSEMBLY ROCK, ROOF CONSOLE BOX ASSEMBLY ROOM LIGHT ASSEMBLY 1 RR INT RR ON SA SB SEATS SYSTEM SELECTABLE FORCE LIMITER SEN-1 SEN-2 SERVICE PLUG SET- SFL- SFR- SG-1 SG-2 SG-4 SG-6 SG-7 SG-8 SG-9 SHIELD SHIELD SHIELD USBS SHIFT INTERLOCK SYSTEM SIDE MARKER, PARKING LIGHT, TURN SL- SLC+ SLF+ SLIDE CLOSE CLS SLIDE OPEN OPN SLT 1 SLT- SLU+ SOL + SP- SPI+ SPIRAL CABLE SUB-ASSEMBLY SPO- SR- SSR+ STARTING CIRCUIT STARTING/ CHARGING SYSTEM STARTING/CHARGING SYSTEM STEERING COLUMN) STEREO JACK ADAPTER ASSEMBLY 1 SUPPLEMENTAL RESTRAINTS SYSTEM TAIL AUTO HEAD TAIL/SIDE MARKER, TURN, STOP TELEVISION DISPLAY ASSEMBLY TELLTALE LIGHT ASSEMBLY THERMOSTAT W/ WATER INLET SUB-ASSEMBLY THR+ TILT DOWN TILT DOWN CLS TILT UP OPN TILT UP SLIDE OPEN TILT VENT SLIDE CLOSE TL TR TMI- TO GROUND HC TO GROUND HD TO GROUND HE TR TL TRANSMISSIONS SYSTEM TRN+ TRNL PPL TRUNK, TAILGATE, FUEL DOORS SYSTEM TTLA PPL TWL- TWR+ UDO+ UL+ UN- UP LEFT VA- VAL+ VAR+ VENT CLS VOLTAGE INVERTER ASSEMBLY VOLTAGE INVERTER ASSEMBLY SHIELD VOR- VOT+ VVE- VVI+ VVL+ VVR+ W-OFF W/ 8 INCH DISPLAY W/ 12.3 INCH DISPLAY W/ ADAPTIVE FRONT LIGHTING SYSTEM W/ DYNAMIC TORQUE CONTROL AWD W/ DYNAMIC TORQUE VECTORING AWD W/ FRONT FOG LIGHT W/ HEAD UP DISPLAY W/ INTERIOR ILLUMINATION LIGHT ASSEMBLY W/ LUMBAR SUPPORT CONTROL W/ MEMORY W/ NAVIGATION W/ PANORAMIC MOON ROOF SYSTEM W/ PARKING SUPPORT BRAKE SYSTEM W/ REAR SEAT ENTERTAINMENT W/ REAR SEAT ENTERTAINMENT SYSTEM W/ REAR SEPARATE SEAT 1 W/ SAFETY CONNECT W/ SLIDING ROOF W/ STOP/ START SYSTEM W/ STOP/START SYSTEM W/O 12.3 INCH DISPLAY W/ 12.3 INCH DISPLAY W/O ADAPTIVE FRONT-LIGHTING SYSTEM W/O AUTO WIPER SYSTEM W/O MEMORY W/O NAVIGATION W/O PANORAMIC W/O PANORAMIC MOONROOF SYSTEM W/O REAR ENTERTAINMENT SYSTEM W/O SAFETY CONNECT W/O SAFETY CONNECT SHIELD W/O STOP/ START SYSTEM W/O STOP/START SYSTEM WARNING SYSTEMS WIPER/ WASHER SYSTEM WIPER/WASHER SYSTEM WJRL SLC-