Circuit Description
WARNING: This page is about a different car, the 2002 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.
When the theft deterrent system is activated, the relay in the ECU turns ON and OFF cycles of approximately 0.2 seconds, causing the theft deterrent horn to blow (See the wiring diagram below).
In this condition, if any of the following operations is done, the relay in the ECU turns OFF, thus stopping the theft deterrent horn from blowing:
- Unlock the front LH or RH door with key.
- Turn the ignition switch to ACC or ON position.
- Unlock the doors with the wireless door lock control system.
- Wait for approximately 60 seconds.
- Push the panic switch of the wireless door lock control system.
Except for the anti-theft purpose, the theft deterrent horn is used as a high-pitched horn.