Navigation (Single Monitor)

MICROPHONE SIGNAL CIRCUIT


Description

Supply power from AV control unit to microphone. The microphone transmits the sound voice to the AV control unit.




MICROPHONE SIGNAL CIRCUIT


Diagnosis Procedure

1.CHECK CONTINUITY BETWEEN AV CONTROL UNIT AND MICROPHONE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and microphone connector.
3. Check continuity between AV control unit harness connector and microphone harness connector.





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





Is inspection result normal?
YES - GO TO 2.
NO - Repair harness or connector.
2.CHECK VOLTAGE MICROPHONE VCC
1. Connect AV control unit connector.
2. Turn ignition switch ON.
3. Check voltage between AV control unit harness connector.





Is inspection result normal?
YES - GO TO 3.
NO - Replace AV control unit.
3.CHECK MICROPHONE SIGNAL
1. Turn ignition switch OFF.
2. Connect microphone connector.
3. Turn ignition switch ON.
4. Check signal between AV control unit harness connector.





Is inspection result normal?
YES - Replace AV control unit.
NO - Replace microphone.