Diesel Data: Automotive Repair

Theft Deterrent Horn Circuit

THEFT DETERRENT HORN CIRCUIT

CIRCUIT DESCRIPTION

While the theft deterrent system is operating, the relay in the ECU turns on and off in a cycle of approximately 0.2 seconds, causing the theft deterrent horn to blow (See the wiring diagram).

In this condition, if any of the following operations has been preformed, the relay in the ECU turns off, thus the theft deterrent horn stops blowing.

Wiring Diagram:






Step 1 - 2:




Step 3:




INSPECTION PROCEDURE