Corolla Sedan 4-Door L4-1587cc 1.6L DOHC MFI (1997)
Horn Relay: Testing and Inspection
HORN RELAY CIRCUIT
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, it causes the ECU to switch ON and OFF in approximately 0.4 sec. cycles. This switches the horn relay ON
and OFF, thus causing the horns to blow.
In this condition, if any of the following operations is done, the ECU goes OFF and the horn relay switches OFF, thus stopping the horns from blowing:
1. Unlock the front LH or RH door with key.
2. Turn the ignition switch to ACC or ON position.
3. Wait for approximately 60 seconds.
Horn Relay Circuit
WIRING DIAGRAM
Inspection Procedure / Horn Relay Circuit
INSPECTION PROCEDURE
