Diagnosis Procedure

WARNING: This page is about a different car, the 2013 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 CONTINUITY VERTICAL SINCHRONIZING (VP) SIGNAL CIRCUIT

Turn ignition switch OFF.
Disconnect display unit connector M93 and AV control unit connector M171.

Check continuity between display unit harness connector M93 (A) terminal 20 and AV control unit harness connector M171 (B) terminal 57.

A		B		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M93	20	M171	57	Yes

Check continuity between display unit harness connector M93 (A) terminal 20 and ground.

A		-	Continuity
Connector	Terminal	-	Continuity
M93	20	Ground	No

Fig 1: Checking Continuity Between Display Unit Harness Connector And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Are continuity results as specified?

YES: GO TO 2.

NO: Repair harness or connector.

CHECK VERTICAL SINCHRONIZING (VP) SIGNAL

Connect display unit connector M93 and AV control unit connector M171.
Turn ignition switch ON.

Check signal between display unit harness connector M93 terminal 20 and ground.

(+)		(-)	Condition	Reference signal
Connector	Terminal	(-)	Condition	Reference signal
M93	20	Ground	Receive audio signal

Fig 2: Checking Signal Between Display Unit Harness Connector And Ground

Courtesy of NISSAN NORTH AMERICA, INC.

Are voltage readings as specified?

YES: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".

NO: Replace display unit. Refer to "REMOVAL AND INSTALLATION ".