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2020 Toyota Highlander Hybrid XLE – Check-Engine Light With P0441
CUSTOMER CONCERN The check-engine light is on with DTC P0441 for incorrect EVAP purge flow. CAUSE The confirmed repair identified a failed canister purge control solenoid valve. CORRECTION Remove and replace the failed canister purge control solenoid valve, clear DTC P0441, and verify the EVAP monitor completes without resetting the code.
2019 Toyota Highlander Hybrid Limited – A/C Stops Cooling When Engine Runs
CUSTOMER CONCERN The air conditioning blows cold with the gasoline engine off but stops cooling when the engine runs. CAUSE The confirmed repair identified lost air-conditioning servomotor initialization as the cause of the temperature-control problem. CORRECTION Perform the air-conditioning servomotor initialization with the scan tool and verify cold air is maintained with the gasoline engine both off and running.
2019 Toyota Highlander Hybrid LE – Temperature Gauge Reads Hot With B1503
CUSTOMER CONCERN The coolant-temperature gauge reads full hot and the combination meter stores DTC B1503. The exhaust temperature switch has already been replaced, but the code immediately returns and both switch wires measure 0 volts with the switch disconnected. CAUSE Rodent damage chewed through the exhaust-temperature-switch wiring beneath the vehicle near the floor area. CORRECTION Repair the damaged exhaust-temperature-switch wiring, clear DTC B1503, and verify the temp
2013 Toyota Highlander Hybrid – Cooling Fans Run With Ignition Off and C1378
CUSTOMER CONCERN The cooling fans continue running with the ignition off and DTC C1378 is stored. CAUSE Corrosion at the brake-control power-supply connector backfed voltage through the A/C No. 2 fuse circuit and kept the fan relays energized. CORRECTION Repair the corroded brake-control power-supply connector and terminals, clear DTC C1378, and verify the cooling fans shut off normally with the ignition off.
2013 Toyota Highlander Hybrid – Transmission Oil Pump Fault With P2602
CUSTOMER CONCERN DTC P2602 returns after the inverter coolant pump was replaced for a transmission oil-pump circuit fault. CAUSE Circuit checks and confirmed repair identified an internal failure of the electric transmission oil pump, not the inverter coolant pump. CORRECTION Remove and replace the failed transmission oil pump, clear DTC P2602, and verify transaxle-oil circulation and normal hybrid-system operation.
2013 Toyota Highlander Hybrid – Brake Accumulator Pump Inoperative With C1256
CUSTOMER CONCERN The brake warning lamps are on, DTC C1256 is stored, and the brake accumulator pump does not run. CAUSE Battery power on the large green and white/red circuits and ground on the large white/black circuit were verified, confirming an internal failure of the brake actuator assembly. CORRECTION Remove and replace the failed brake actuator assembly, perform the required brake-system bleed and calibration procedures, clear DTC C1256, and verify normal accumulator-
2011 Toyota Highlander Hybrid Limited – P2602 Returns After Inverter Pump Replacement
CUSTOMER CONCERN Check-engine warning is on with DTC P2602, and replacing the inverter water pump did not stop the code from returning. CAUSE P2602 applied to the transaxle oil-circulation pump rather than the inverter coolant pump. Power, ground and control-circuit testing identified the transmission oil-pump assembly as the failed component. CORRECTION Remove and replace the transmission oil-pump assembly, clear DTC P2602, and verify transaxle oil-pump operation.
2008 Toyota Highlander Hybrid Limited – Sensitive Brakes With C1247
CUSTOMER CONCERN The brakes do not respond through the first portion of pedal travel and then apply abruptly. DTC C1247 is stored. CAUSE Brake-pedal stroke-sensor and circuit testing confirmed the brake-pedal stroke sensor had failed. CORRECTION Remove and replace the failed brake-pedal stroke sensor.
2009 Toyota Highlander Hybrid Limited – Loud Engine Noise and Stalling With Timing Codes
CUSTOMER CONCERN The engine developed a loud noise, stalled, and will only run briefly. DTCs P0016, P0018, P3190, P3191, P3193, and P0A0F are stored. CAUSE Camshaft-correlation and mechanical timing inspection confirmed incorrect camshaft timing caused by the timing-belt drive. CORRECTION Remove and replace the timing belt and restore the crankshaft-to-camshaft timing alignment.
2009 Toyota Highlander Hybrid Limited – Check Engine Light With P0420
CUSTOMER CONCERN The check engine light is on with catalyst-efficiency DTC P0420 after induction-system service. CAUSE Fuel-control, oxygen-sensor, and converter testing confirmed that the catalytic converter was no longer operating efficiently. CORRECTION Remove and replace the failed catalytic converter.
2009 Toyota Highlander Hybrid – No Start With P0A78
CUSTOMER CONCERN The vehicle stalled after driving, will not restart or enter READY mode, and displays Service Hybrid System and VSC warnings with DTC P0A78 stored. CAUSE Hybrid-system testing and the applicable service bulletin confirmed an internal power-inverter failure. CORRECTION Remove and replace the hybrid power inverter assembly.
2008 Toyota Highlander Hybrid Limited – Airbag Light With B1650 and B1794
CUSTOMER CONCERN The airbag warning light is on with DTCs B1650 and B1794 stored. CAUSE Power and circuit testing at the occupant-classification ECU confirmed a failed connection at the DN3 junction connector. CORRECTION Repair the terminals and connections at the DN3 junction connector.
2009 Toyota Highlander Hybrid Limited – Engine Knock and Misfire Codes
CUSTOMER CONCERN The engine runs poorly with a knocking noise, inverter-coolant gurgling, and DTCs P0302, P0304, and P3221 stored. CAUSE Cylinder contribution and component-swap testing confirmed failed ignition coils causing the cylinder misfires. CORRECTION Remove and replace the failed ignition coils.
2008 Toyota Highlander Hybrid – Backup Camera Screen Is Blank
CUSTOMER CONCERN The display switches to the reverse-camera screen, but no camera image appears. Replacing the camera did not correct the concern. CAUSE Voltage and continuity testing confirmed damaged backup-camera wiring in the tailgate circuit. CORRECTION Repair the backup-camera wiring in the tailgate circuit.
2008 Toyota Highlander Hybrid Limited – No Brake Pressure After Rear Calipers
CUSTOMER CONCERN Customer states brake pressure was lost at the right rear after rear brake and caliper replacement, and manual, gravity and pressure bleeding did not restore the pedal. CAUSE Air remained trapped in the electronically controlled hydraulic brake system, and zero accumulator pressure prevented the scan-tool bleed routine from operating normally. CORRECTION Operate brake pump to establish accumulator pressure, then perform complete hybrid ABS service-bleed proce
2008 Toyota Highlander Hybrid Limited – No Crank and No Electrical Power
CUSTOMER CONCERN Customer states the vehicle will not crank or start and nearly all electrical systems are inoperative after the 12-volt battery went dead. CAUSE Voltage testing found no power at the engine-compartment battery terminal, confirming the 120-amp DC/DC fusible link was open. CORRECTION Remove and replace 120-amp DC/DC fusible link. Inspect remaining power-distribution fuses and verify normal vehicle power-up and READY-mode operation.
2008 Toyota Highlander Hybrid Limited – Noise When Powered On
CUSTOMER CONCERN Customer states a noise begins in the engine compartment as soon as the vehicle is powered on. CAUSE Inspection isolated the noise to the auxiliary heater water pump, one of the components operating immediately at power-up. CORRECTION Remove and replace auxiliary heater water pump. Refill and bleed the heater-coolant circuit and verify quiet pump operation.
2008 Toyota Highlander Hybrid – ABS Pump Runs With C1391
CUSTOMER CONCERN Customer states the ABS and brake warning lights are on and the ABS pump runs repeatedly. DTC C1391 is stored. CAUSE No external brake-fluid leak was found, and accumulator pressure dropped after pump shutdown, confirming internal leakage in the ABS brake actuator. CORRECTION Remove and replace ABS brake actuator assembly. Perform actuator initialization and complete brake-system bleed, clear DTC C1391 and verify accumulator pressure holds.
2008 Toyota Highlander Hybrid Limited – C1203 C1345 After Battery Went Dead
CUSTOMER CONCERN Customer states the 12-volt battery went dead during an alignment and DTCs C1203 and C1345 are now stored. CAUSE Loss of battery voltage erased the linear-solenoid valve offset calibration, leaving the brake-control system incorrectly configured. CORRECTION Perform linear-solenoid valve initialization and calibration, complete yaw-rate sensor calibration as required, clear DTCs C1203 and C1345 and verify brake-system operation.
2008 Toyota Highlander Hybrid Limited – Intermittent Shutdown With P0A40
CUSTOMER CONCERN Customer states the vehicle intermittently shuts off and all warning lights illuminate. DTC P0A40 is stored. CAUSE Drive-motor position-sensor circuit testing and inverter recall identification confirmed an internal hybrid converter/inverter assembly failure. CORRECTION Remove and replace hybrid converter/inverter assembly. Complete applicable recall programming, clear hybrid-system DTCs and verify vehicle operation.
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