Diagnosis Procedure

WARNING: This page is about a different car, the 2008 Infiniti EX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUITS
Check display unit power supply and ground circuits. Refer to DIAGNOSIS PROCEDURE .

Is inspection result normal?

YES: GO TO 2.

NO: Repair malfunctioning parts.

CHECK CONTINUITY COMMUNICATION CIRCUITS

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

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

CONTINUITY REFERENCE TABLE

Display unit		AV control unit		Continuity
Connector	Terminals	Connector	Terminals	Continuity
M75	11	M88	70	Existed
M75	22	M88	71	Existed

Check continuity between display unit harness connector and ground.

CONTINUITY REFERENCE TABLE

Display unit		Ground	Continuity
Connector	Terminals
M75	11		Not existed
	22

Is inspection result normal?

YES: GO TO 3.

NO: Repair harness or connector.

CHECK COMMUNICATION SIGNAL

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

Check signal between display unit harness connector and ground.

SIGNAL REFERENCE TABLE

(+)		(-)	Signal
Display unit
Connector	Terminal
M75	11	Ground	Courtesy of NISSAN MOTOR CO., U.S.A.

Is inspection result normal?

YES: GO TO 4.

NO: Replace AV control unit.

CHECK COMMUNICATION SIGNAL

Check signal between display unit harness connector and ground.

SIGNAL REFERENCE TABLE

(+)		(-)	Signal
Display unit
Connector	Terminal
M75	22	Ground	Courtesy of NISSAN MOTOR CO., U.S.A.

Is inspection result normal?

YES: INSPECTION END

NO: Replace display unit.