Horn Relay Circuit

Horn Relay Circuit

CIRCUIT DESCRIPTION
When the theft deterrent system is activated, it causes the Tr in the ECU to switch on and off in approximately 0.2 sec. cycles. This switches the horn relay on and off, thus the horn blow (See the wiring diagram below). In this condition, if any of the following operations is done, the Tr in the ECU goes off and the horn relay switches off, thus the horns stop 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:

INSPECTION PROCEDURE