Diagnosis Procedure

BUZZER CIRCUIT


Description

The sonar control unit outputs the buzzer signal when the rear sonar detects the obstacle.




BUZZER CIRCUIT


Diagnosis Procedure

1.CHECK BUZZER POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between buzzer harness connector and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Repair harness or connector.
2.CHECK HARNESS BUZZER SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect sonar control unit connector and buzzer connector.
3. Check continuity between sonar control unit harness connector and buzzer harness connector.





4. Check continuity between sonar control unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair harness or connector.
3.CHECK SIGNAL SONAR CONTROL UNIT
1. Connect sonar control unit connector and buzzer connector.
2. Check signal between sonar control unit harness connector and ground.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace sonar control unit.