Corolla Sedan 4-Door L4-1587cc 1.6L DOHC MFI (1997)
Headlamp Relay: Component Tests and General Diagnostics
Symptom Chart
Troubleshooting / Theft Deterrent System
HINT: Troubleshooting of the theft deterrent system is based on the premise that the door lock control system is operating normally. Accordingly,
before troubleshooting the theft deterrent system, first make certain that the door lock control system is operating normally.
Inspection Flow Charts
HEADLIGHT CONTROL RELAY CIRCUIT
CIRCUIT DESCRIPTION
When the theft deterrent system is activated, it causes the ECU to switch ON and OFF at approximately 0.4 sec. intervals. This switches the headlight
control relay ON and OFF, thus flashing the headlights.
In this condition, if any of the following operations is done, the ECU goes off and the headlight control relay switches OFF, thus stopping the headlights
from flashing:
1. Unlock the front LH or RH door with key.
2. Turn the ignition switch to ACC or ON position.
3. Wait for approximately 1 minute.
