Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan 370Z. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FRONT DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check front display unit power supply and ground circuit. Refer to "FRONT DISPLAY UNIT : DIAGNOSIS PROCEDURE ".

Is the inspection result normal?

YES: Go to 2.

NO: Repair malfunctioning parts.

CHECK CONTINUITY COMMUNICATION CIRCUIT

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

Check continuity between front display unit harness connector and AV control unit harness connector.

CONTINUITY SPECIFICATION

Front display unit		AV control unit		Continuity
Connector	Terminals	Connector	Terminals	Continuity
M75	9	M86	89	Existed
M75	10	M86	73	Existed

Check continuity between front display unit harness connector and ground.

CONTINUITY SPECIFICATION

Front display unit		Ground	Continuity
Connector	Terminals
M75	9		Not existed
	10

Is the inspection result normal?

YES: Go to 3.

NO: Repair harness or connector.

CHECK COMMUNICATION SIGNAL

Connect front display unit connector and AV control unit connector.
Turn ignition switch ON.
Check signal between front display unit harness connector and ground.

TERMINALS REFERENCE

(+)		(-)	Condition	Reference value
Front display unit
Connector	Terminal
M75	9	Ground	When adjusting display brightness.	Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal?

YES: Go to 4.

NO: Replace AV control unit. Refer to "REMOVAL AND INSTALLATION ".

CHECK COMMUNICATION SIGNAL

Check signal between front display unit harness connector and ground.

TERMINALS REFERENCE

(+)		(-)	Condition	Reference value
Front display unit
Connector	Terminal
M75	10	Ground	When adjusting display brightness.	Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal?

YES: INSPECTION END

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