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 CIRCUIT
Check display unit power supply and ground circuits. Refer to DIAGNOSIS PROCEDURE .

Is the inspection result normal?

YES: GO TO 2.

NO: Repair malfunctioning parts.

CHECK CONTINUITY COMMUNICATION CIRCUIT

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.

TERMINALS CONTINUITY SPECIFICATION

Display unit		AV control unit		Continuity
Connector	Terminals	Connector	Terminals	Continuity
M71	11	M83	56	Existed
M71	22	M83	44	Existed

Check continuity between display unit harness connector and ground.

TERMINALS CONTINUITY SPECIFICATION

Display unit		Ground	Continuity
Connector	Terminals
M71	11		Not existed
	22

Is the inspection result normal?

YES: GO TO 3.

NO: Repair harness or connector.

CHECK COMMUNICATION SIGNAL (CONT→DISP)

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

Check signal between display unit harness connector and ground.

TERMINALS REFERENCE

(+)		(-)	Condition	Reference value
Display unit
Connector	Terminal
M71	11	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.

CHECK COMMUNICATION SIGNAL (DISP→CONT)

Check signal between display unit harness connector and ground.

TERMINALS REFERENCE

(+)		(-)	Condition	Reference value
Display unit
Connector	Terminal
M71	22	Ground	When adjusting display brightness.	Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal?

YES: INSPECTION END

NO: Replace display unit.