With Navigation

MICROPHONE SIGNAL CIRCUIT

Diagnosis Procedure

Regarding Wiring Diagram information, refer to "Wiring Diagram" With Navigation.

1. CHECK MICROPHONE SIGNAL CIRCUIT CONTINUITY

1.Turn ignition switch OFF.
2.Disconnect AV control unit connector M153 and microphone connector R7.
3.Check continuity between AV control unit connector M153 and microphone connector R7.





4.Check continuity between AV control unit connector M153 and ground.





Is inspection result normal?
YES- GO TO 2.
NO- Repair or replace harness or connectors.

2. CHECK MICROPHONE VCC VOLTAGE

1.Connect AV control unit connector M153.
2.Turn ignition switch ON.
3.Check voltage between terminals of AV control unit connector M153.





Is the inspection result normal?
YES- GO TO 3.
NO- Replace AV control unit. Refer to "Removal and Installation" With Navigation.

3. CHECK MICROPHONE SIGNAL

1.Connect microphone connector.
2.Check signal between terminals of AV control unit connector M153.





Is the inspection result normal?
YES- Replace AV control unit. Refer to "Removal and Installation" With Navigation.
NO- Replace microphone. Refer to "Removal and Installation" With Navigation.