BSW

WARNING BUZZER CIRCUIT





Component Function Check
1.CHECK WARNING BUZZER
1. Turn the ignition switch ON.
2. Select the active test item "LDP BUZZER" of "ICC/ADAS" with CONSULT-III.
3. With operating the test item, check the operation.

On : Warning buzzer is activated.
Off : Warning buzzer is not activated.

Is the inspection result normal?
YES - INSPECTION END
NO - LDW & LDP.




Diagnosis Procedure
1.CHECK WARNING BUZZER POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the warning buzzer connector.
3. Turn ignition switch ON.
4. Check voltage between the warning buzzer harness connector and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Repair the warning buzzer power supply circuit.
2.CHECK WARNING BUZZER GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between the warning buzzer harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair the harnesses or connectors.
3.CHECK WARNING BUZZER SIGNAL CIRCUIT FOR OPEN
1. Disconnect the ADAS control unit connector.
2. Check continuity between the ADAS control unit harness connector and warning buzzer harness connector.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair the harnesses or connectors.
4.CHECK WARNING BUZZER SIGNAL CIRCUIT FOR SHORT
Check continuity between the ADAS control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 5.
NO - Repair the harnesses or connectors.
5.CHECK WARNING BUZZER OPERATION
1. Connect the warning buzzer connector.
2. Turn ignition switch ON.
3. Apply ground to warning buzzer terminal 2.
4. Check condition of the warning buzzer.
Does warning buzzer sound?
YES - Replace the ADAS control unit.
NO - Replace the warning buzzer.