Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the AV control unit for damage, bend and loose connection (unit side and connector side).
Is the inspection result normal?

YES: GO TO 2.

NO: Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect the connector of AV control unit.
Check the resistance between the AV control unit harness connector terminals.

With BOSE audio system with navigation system

AV control unit harness connector			Resistance (Ω)
Connector No.	Terminal No.
M48	99	100	Approx. 54 - 66

With BOSE audio system without navigation system

AV control unit harness connector			Resistance (Ω)
Connector No.	Terminal No.
M70	86	87	Approx. 54 - 66

With mid audio system

AV control unit harness connector			Resistance (Ω)
Connector No.	Terminal No.
M135	86	87	Approx. 54 - 66

Is the measurement value within the specification?

YES: GO TO 3.

NO: Repair the AV control unit branch line.

CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the AV control unit. Refer to the following.
- With BOSE audio system with navigation system: "AV CONTROL UNIT: DIAGNOSIS PROCEDURE "
- With BOSE audio system without navigation system: "AV CONTROL UNIT: DIAGNOSIS PROCEDURE "
- With mid audio system: "AV CONTROL UNIT: DIAGNOSIS PROCEDURE "
Is the inspection result normal?

YES (Present error)>>Replace the AV control unit. Refer to the following.
- With BOSE audio system with navigation system: "REMOVAL AND INSTALLATION "
- With BOSE audio system without navigation system: "REMOVAL AND INSTALLATION "
- With mid audio system: "REMOVAL AND INSTALLATION "
YES (Past error)>>Error was detected in the AV control unit branch line.

NO: Repair the power supply and the ground circuit.