Diagnosis Procedure

WARNING: This page is about a different car, the 2008 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE

Check for blown fuses.

FUSE REFERENCE TABLE

Power source	Fuse No.
Battery	34
Ignition switch ACC or ON	19
Ignition switch ON or START	3

Is inspection result normal?

YES: GO TO 2.

NO: Be sure to eliminate cause of malfunction before installing new fuse.

CHECK POWER SUPPLY CIRCUIT

Check voltage between AV control unit harness connectors and ground.

VOLTAGE SPECIFICATION TABLE

Signal name	Connector No.	Terminal No.	Ignition switch position	Value (Approx.)
Battery power supply	M80	19	OFF	Battery voltage
	M87	22
	M87	24
ACC power supply	M80	7	ACC	Battery voltage
ACC power supply	M87	25	ACC	Battery voltage
Ignition signal	M87	35	ON	Battery voltage

Is inspection result normal?

YES: GO TO 3.

NO: Check harness between AV control unit and fuse.

CHECK GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect AV control unit connectors.

Check continuity between AV control unit harness connectors and ground.

CONTINUITY REFERENCE TABLE

Signal name	Connector No.	Terminal No.	Ignition switch position	Continuity
Ground	M80	20	OFF	Existed
	M87	21
	M87	23

Is inspection result normal?

YES: INSPECTION END

NO: Repair harness or connector.