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AV BUZZER CIRCUIT AV-589 < COMPONENT DIAGNOSIS > [BOSE AUDIO WITH NAVIGATION] C D E F G H I J K L M B A O P BUZZER CIRCUIT Description INFOID:0000000003597481 The sonar control unit outputs the buzzer signal when the rear sonar detects the obstacle. Component Function Check INFOID:0000000003597482 1. SONAR CONTROL UNIT ACTIVE TEST Check the buzzer operation with the sonar control unit active test. BUZZER >> INSPECTION END Diagnosis Procedure INFOID:0000000003597483 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. Test item Condition On : Buzzer is operation. Off : Buzzer is not operation. (+) ( − ) Voltage (Approx.) Buzzer Connector Terminal B240 1 Ground Battery voltage Sonar control unit Buzzer Continuity Connector Terminal Connector Terminal M47 23 B240 2 Existed Sonar control unit Ground Continuity Connector Terminal M47 23 Not existed |