AV Communication Line Check (Between Display Control Unit and NAVI Control Unit)

WARNING: This page is about a different car, the 2006 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

CHECK POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit for NAVI control unit. Refer to "POWER SUPPLY AND GROUND CIRCUIT CHECK FOR NAVI CONTROL UNIT ".

OK or NG

OK : GO TO 2.

NG : Check the malfunctioning parts.

CHECK HARNESS

Turn ignition switch OFF.
Disconnect NAVI control unit connector B152 and display control unit connector M95.

Check continuity between NAVI control unit and display control unit.

CONTINUITY CONDITIONS

Terminals				Continuity
B		A
Connector	Terminal	Connector	Terminal
NAVI control unit: B152	69	Display control unit: M95	32	Yes
NAVI control unit: B152	70	Display control unit: M95	34	Yes

Check continuity between NAVI control unit and ground.

CONTINUITY CONDITIONS

Terminals			Continuity
B		-
Connector	Terminal	-
NAVI control unit: B152	69	Ground	No
NAVI control unit: B152	70	Ground	No

Fig 1: Identifying Continuity Between NAVI And Display Control Unit Terminals And Ground

OK or NG

OK : GO TO 3.

NG : Repair harness or connector.

CHECK SELF-DIAGNOSIS OF DCU
1. Replace NAVI control unit.
2. Connect NAVI control unit connector and display control unit connector.
3. Turn ignition switch ON.
4. Start self-diagnosis of DCU and check the self-diagnosis result.
OK or NG

OK : Inspection End.

NG : Replace display control unit. Refer to "DISPLAY CONTROL UNIT ".