Nissan Maxima Service and Repair Manual: Microphone signal circuit

Description

Voice signals are transmitted from the microphone to the AV control unit using the microphone signal circuits.

Diagnosis Procedure

1.CHECK HARNESS BETWEEN AV CONTROL UNIT AND MICROPHONE

1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and microphone connector.
3. Check continuity between AV control unit harness connector M163 (A) and microphone harness connector R7 (B).
4. Check continuity between AV control unit harness connector M163 (A) and ground.

2.CHECK MICROPHONE POWER SUPPLY

1. Connect AV control unit connector and microphone connector.
2. Turn ignition switch ON.
3. Check voltage between microphone harness connector R7 terminal 4 and ground.

3.CHECK MICROPHONE SIGNAL

Check signal between AV control unit harness connector M163 terminals 43 and 59.