Diagnosis Procedure
WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK MICROPHONE CIRCUIT CONTINUITY
- Turn ignition switch OFF.
- Disconnect audio unit connector M82 and microphone connector R22.
- Check continuity between audio unit connector M82 and microphone connector R22.
Audio unit
Microphone
Continuity
Connector
Terminal
Connector
Terminal
M82
53
R22
1
Yes
54
2
34
4
- Check continuity between audio unit connector M82 and ground.
Audio unit
Ground
Continuity
Connector
Terminal
M82
34
--
No
53
Is inspection result normal?
YES
GO TO 2.
NO
Repair or replace harness or connectors.
- CHECK MICROPHONE VCC VOLTAGE
- Connect audio unit connector M82.
- Turn ignition switch ON.
- Check voltage between terminals of audio unit connector M82.
Audio unit connector M82
Voltage
(Approx.)
(+)
(-)
Terminal
Terminal
34
54
5.0 V
Is the inspection result normal?
YES
GO TO 3.
NO
Replace audio unit. Refer to Removal and Installation .
- CHECK MICROPHONE SIGNAL
- Connect microphone connector.
- Check signal between terminals of audio unit connector M82.
Audio unit connector M82
Condition
Reference value
(+)
(-)
Terminal
Terminal
53
54
Speak into microphone.
Is the inspection result normal?
YES
Replace audio unit. Refer to Removal and Installation .
NO
Replace microphone. Refer to Removal and Installation .