Hazard Warning Switch: Testing and Inspection

HAZARD SWITCH





Component Function Check
1.CHECK HAZARD SWITCH SIGNAL BY CONSULT-III
CONSULT-III DATA MONITOR
1. Turn ignition switch ON.
2. Select "HAZARD SW" of BCM (FLASHER) data monitor item.
3. With operating the hazard switch, check the monitor status.





Is the measurement normal?
YES - Hazard switch circuit is normal.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1.CHECK HAZARD SWITCH SIGNAL INPUT
1. Turn ignition switch OFF.
2. Disconnect hazard switch connector.
3. Turn ignition switch ON.
4. Check voltage between hazard switch harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 2.
2.CHECK HAZARD SWITCH SIGNAL OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M19.
3. Check continuity between hazard harness connector and BCM harness connector.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace harness.
3.CHECK HAZARD SWITCH SIGNAL SHORT CIRCUIT
Check continuity between hazard switch harness connector and ground.





Is the inspection result normal?
YES - Replace BCM. Service and Repair.
NO - Repair or replace harness.
4.CHECK HAZARD SWITCH GROUND OPEN CIRCUIT
Check continuity between hazard switch harness connector and ground.





Is the inspection result normal?
YES - Replace hazard switch. Service and Repair.
NO - Repair or replace harness.