DTC 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.
Voice signals are transmitted from the microphone to the AV control unit using the microphone signal circuits.
- CHECK HARNESS BETWEEN AV CONTROL UNIT AND MICROPHONE
- Turn ignition switch OFF.
- Disconnect AV control unit connector M46 and microphone connector R22.
- Check continuity between AV control unit harness connector M46 and microphone harness connector R22.
Connector
Terminal
Connector
Terminal
Continuity
M46
41
R22
2
Yes
42
4
43
1
- Check continuity between AV control unit harness connector M46 and ground.
Connector
Terminal
--
Continuity
M46
41
Ground
No
42
43
Are continuity results as specified?
YES
GO TO 2
NO
Repair harness or connector.
- CHECK MICROPHONE POWER SUPPLY
- Connect AV control unit connector M46 and microphone connector R22.
- Turn ignition switch ON.
- Check voltage between microphone harness connector R22 and ground.
(+)
(-)
Voltage (approx.)
Connector
Terminal
R22
4
Ground
5 V
Is voltage reading as specified?
YES
GO TO 3
NO
Replace AV control unit. Refer to Removal and Installation .
- CHECK MICROPHONE SIGNAL
Check signal between AV control unit harness connector M46.
Connector
(+)
(-)
Condition
Value (Approx.)
Terminal
M46
43
41
While speaking into MIC
Were voltage readings as specified?
YES
Replace AV control unit. Refer to Removal and Installation .
NO
Replace microphone. Refer to Removal and Installation .