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 0.2 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 from blowing:
(1) The front LH or RH door is unlocked with a key.
(2) The ignition switch is turned to the ACC or ON position.
(3) Approximately 1 minute elapses.





WIRING DIAGRAM

Step 1:

Step 2:

Step 3:

INSPECTION PROCEDURE