AV CONTROL UNIT : Diagnosis Procedure

WARNING: This page is about a different car, the 2010 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

CHECK FUSES

Check that the following AV control unit fuses are not blown.

FUSE TERMINAL REFERENCE

Unit	Terminals	Signal name	Fuse No.
AV control unit	19	Battery power	31
	66	Battery power	31
	68	Battery power	31
	7	Ignition switch ACC or ON	4
	69	Ignition switch ACC or ON	4
	79	Ignition switch ON or START	12

Are the fuses OK?

YES: GO TO 2

NO: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

POWER SUPPLY CIRCUIT CHECK

Disconnect AV control unit connectors M42 and M45.

Check voltage between the AV control unit connectors M42 and M45 and ground.

VOLTAGE SPECIFICATION

(+)		(-)	OFF	ACC	ON
Connector	Terminal	(-)	OFF	ACC	ON
M42	7	Ground	0V	Battery voltage	Battery voltage
M42	19	Ground	Battery voltage	Battery voltage	Battery voltage
M45	66	Ground	Battery voltage	Battery voltage	Battery voltage
	68	Ground	Battery voltage	Battery voltage	Battery voltage
	69	Ground	0V	Battery voltage	Battery voltage
	79	Ground	0V	0V	Battery voltage

Fig 1: Checking Voltage Between AV Control Unit Connectors M42 And M45 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

Are the voltage results as specified?

YES: GO TO 3

NO:

Check connector housings for disconnected or loose terminals.
Repair harness or connector.

GROUND CIRCUIT CHECK

Ignition OFF.

Check continuity between AV control unit harness connectors M42 and M45 and ground.

CONTINUITY CHART

Connector	(+)	(-)	Continuity
Connector	Terminal	(-)	Continuity
M42	20	Ground	Yes
M45	65
M45	66

Are the continuity results as specified?

YES: Inspection End.

NO: Repair AV control unit ground.

Fig 2: Checking Continuity Between AV Control Unit Harness Connectors M42 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.