Theft Deterrent Horn Circuit

Theft Deterrent Horn Circuit

CIRCUIT DESCRIPTION
When the theft deterrent system is activated, contact "a" and contact "b" in the ECU close alternately in cycles of approximately 0.4 Sec., causing the theft deterrent horn to blow (See the wiring diagram below).
In this condition, if any of the following operations is done, the contact "a" in the ECU opens, thus stopping the theft deterrent horn blow:
(1) Unlock the LH or RH door with key.
(2) Turn the ignition switch to ACC or ON position.
(3) Unlock the doors with the wireless door lock control system.
(4) Wait for approximately 1 minute.





WIRING DIAGRAM

Step 1:

Step 2:

Step 3:

INSPECTION PROCEDURE