DISPLAY UNIT : Diagnosis Procedure

WARNING: This page is about a different car, the 2010 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 POWER SUPPLY CIRCUIT

Turn ignition switch to ACC.

Check voltage between display unit harness connector M93 and ground.

VOLTAGE SPECIFICATION

(+)		(-)	Value (Approx.)
Connector	Terminal	(-)	Value (Approx.)
M93	2	Ground	9V
M93	3	Ground	9V

Fig 1: Checking Voltage Between Display Unit Harness Connector M93 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

Does specified voltage exist?

YES: GO TO 3.

NO: GO TO 2.

CHECK POWER SUPPLY CIRCUIT

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

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

CONTINUITY CHART

A		B		Continuity
Connector	Terminal	Connector	Terminal	Continuity
M93	2	M171	59	Yes
M93	3	M171	47	Yes

Fig 2: Checking Continuity Between Display Unit Harness Connector M93 And AV Control Unit Connector M171

Courtesy of NISSAN MOTOR CO., U.S.A.

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

CONTINUITY CHART

A		-	Continuity
Connector	Terminal	-	Continuity
M93	2	Ground	No
M93	3		No

Are continuity results as specified?

YES: Check AV control unit power and ground supply. Refer to "AV CONTROL UNIT : DIAGNOSIS PROCEDURE ".

NO: Repair harness or connector.

CHECK GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect display unit connector.

Check continuity between display unit harness connector and ground.

CONTINUITY CHART

Connector	Terminal	-	Continuity
M93	1	Ground	Yes

Fig 3: Checking Continuity Between Display Unit Harness Connector And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

Does continuity exist?

YES: Inspection End.

NO: Repair harness or connector.