Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2005HIGHLANDER LIMITED, FWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSWIRELESS DOOR LOCK - DIAGNOSTICSONLY WIRELESS CONTROL FUNCTION IS INOPERATIVECIRCUIT DESCRIPTION
2005 Toyota Highlander Limited, FWD
Circuit Description
2005 Toyota Highlander Limited, FWDSECTION Circuit Description
The door control receiver receives a signal from transmitter and sends it to body ECU by line. And the body ECU transmits the signal to the door lock assembly to control the door lock/unlock operation.
NOTE:
The wireless door lock control system has a function with a large-scale multiplex communication system. First of all, inspect the communication function depending on the " HOW TO PROCEED WITH TROUBLESHOOTING ", and check that the communication system has no malfunction. Then finally proceed with the troubleshooting. Also, in case that the wire harness between the body ECU and door control receiver has been short-circuited, diagnostic code 42 will be output and the wireless control will not function.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.