Circuit Description
WARNING: This page is about a different car, the 2002 Lexus ES 300. However, it is still accessible from the selected car via links, so may be relevant.
When there is no answer back in spite that the wireless door lock and unlock function is operating, there might be abnormality in the outputs of the hazard light signal from the theft warning ECU and also in the outputs of the wireless buzzer:
- Wireless door lock system has a function with a large-scale body multiplex communications. Inspect the communication function and check that there is no abnormality in the communication system. See MULTIPLEX COMMUNICATION SYSTEM article in COMMUNICATION DEVICES.
- Confirm that the hazard answer back function is customized and the buzzer controller switch is not in the OFF position.
Suspected Area:
- Wireless Door Lock Buzzer.
- Wiring Harness.