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Home >> Toyota >> 2003 >> Highlander Limited, AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Wireless Door Lock Control System - Diagnostics >> Wireless Door Lock Control System >> Only Wireless Control Function Is Inoperative >> Circuit Description

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 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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