Hazard Warning Lamp Does Not Operate But Turn Signal Lamp Operates

TURN SIGNAL AND HAZARD WARNING LAMPS


Hazard Warning Lamp Does Not Operate But Turn Signal Lamp Operates

1.CHECK HAZARD SWITCH INPUT SIGNAL
With CONSULT-III
1. Select "BCM" on CONSULT-III. Select "FLASHER" on "SELECT TEST ITEM" screen.
2. Select "DATA MONITOR". Make sure that "HAZARD SW" turns ON-OFF linked with operation of hazard switch.

When hazard switch is in ON position : HAZARD SW ON

Without CONSULT-III





Check voltage between BCM harness connector and ground.





OK or NG
OK - Replace BCM. Service and Repair.
NG - GO TO 2.
2.CHECK HAZARD SWITCH CIRCUIT





1. Turn ignition switch OFF.
2. Disconnect BCM connector and hazard switch connector.
3. Check continuity between BCM harness connector M18 (A) and hazard switch harness connector M102 (B).





OK or NG
OK - GO TO 3.
NG - Repair harness or connector.
3.CHECK GROUND CIRCUIT





Check continuity between hazard switch harness connector M102 terminal 1 and ground.

1 - Ground : Continuity should exist.

OK or NG
OK - GO TO 4.
NG - Repair harness or connector.
4.CHECK HAZARD SWITCH





1. Disconnect hazard switch connector.
2. Check continuity between hazard switch terminals.





OK or NG
OK - Replace BCM if hazard warning lamps do not operate after setting the connector again. Service and Repair.
NG - Replace hazard switch. Service and Repair .