Diagnosis Procedure

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.

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

CHECK USB INTERFACE HARNESS CONTINUITY

Turn ignition switch OFF.
Disconnect AV control unit connector M55 and USB interface connector M209.

Check continuity between AV control unit connector M55 and USB interface connector M209.

AV control unit		USB interface		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M55	138	M209	1	Yes
	137		2
	140		3
	139		4
	141		5

Check continuity between AV control unit connector M55 and ground.

AV control unit		-	Continuity
Connector	Terminal	-	Continuity
M55	137	Ground	No
M55	139	Ground	No

Is the inspection result normal?

YES

Replace the USB interface. Refer to REMOVAL AND INSTALLATION .

Repair or replace harness or connectors.