Diagnostic Test

WARNING: This page is about a different car, the 2016 Infiniti QX60. 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 STEP 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.

Base audio system

AV control unit harness connector			Resistance (Ω)
Connector No.	Terminal No.
M42	11	12	Approx. 54 - 66

BOSE audio without navigation system (Models without ICC system)

AV control unit harness connector			Resistance (Ω)
Connector No.	Terminal No.
M192	11	12	Approx. 54 - 66

BOSE audio without navigation system (Models with ICC system)

AV control unit harness connector			Resistance (Ω)
Connector No.	Terminal No.
M192	78	62	Approx. 54 - 66

BOSE audio with navigation system without surround sound system

AV control unit harness connector			Resistance (Ω)
Connector No.	Terminal No.
M124	78	62	Approx. 54 - 66

BOSE audio with navigation system with surround sound system

AV control unit harness connector			Resistance (Ω)
Connector No.	Terminal No.
M163	78	62	Approx. 54 - 66

Is the measurement value within the specification?

YES

GO TO STEP 3 .

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.
- Base audio system: DIAGNOSIS PROCEDURE
- BOSE audio without navigation system: DIAGNOSIS PROCEDURE
- BOSE audio with navigation system without surround sound system: DIAGNOSIS PROCEDURE
- BOSE audio with navigation system with surround sound system: DIAGNOSIS PROCEDURE
Is the inspection result normal?

YES (Present error)

Replace the AV control unit. Refer to the following.
- Base audio system: REMOVAL AND INSTALLATION
- BOSE audio without navigation system: REMOVAL AND INSTALLATION
- BOSE audio with navigation system without surround sound system: REMOVAL AND INSTALLATION
- BOSE audio with navigation system with surround sound 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.