Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK MICROPHONE SIGNAL

Turn ignition switch ON.

Check the signal between the terminals of AV control unit connector M163.

AV control unit connector M163		Condition	Reference value
(+)	(-)
Terminal
46	48	Speak into microphone.	Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

Replace AV control unit. Refer to Removal and Installation .

GO TO 2 .

CHECK VOLTAGE MICROPHONE VCC

Turn ignition switch OFF.
Disconnect microphone connector.
Turn ignition switch ON.
Check the voltage between the terminals of microphone connector R22.

Microphone connector R22		Voltage (Approx.)
(+)	(-)
Terminal
4	2	5.0 V

Is the inspection result normal?

YES

Replace microphone. Refer to Removal and Installation .

GO TO 3 .

CHECK MICROPHONE CIRCUIT FOR OPEN

Turn ignition switch OFF.
Disconnect AV control unit connector M163.

Check continuity between AV control unit connector M163 and microphone connector R22.

AV control unit		Microphone		Continuity
Connector	Terminal	Connector	Terminal
M163	46	R22	1	Yes
	47		4
	48		2

Is the inspection result normal?

YES

GO TO 4 .

Repair or replace harness or connectors.

CHECK MICROPHONE CIRCUIT FOR SHORT

Check the continuity between AV control unit connector M163 and ground.

(+)		(-)	Continuity
AV control unit
Connector	Terminal
M163	46	Ground	No
	47

Is the inspection result normal?

YES

Replace AV control unit. Refer to Removal and Installation .

Repair or replace harness or connectors.