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

1. 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.

1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector and display control unit connector.
3. Check continuity between NAVI control unit and display control unit.
   NAVI CONTROL UNIT AND DISPLAY CONTROL UNIT
   
   

   Terminals				Continuity
   NAVI control unit		Display control unit
   Connector	Terminal	Connector	Terminal
   B41	44	M95	32	Yes
   	45		34

4. Check continuity between NAVI control unit and ground.
   NAVI CONTROL UNIT AND GROUND
   
   

   Terminals			Continuity
   NAVI control unit		-
   Connector	Terminal
   B41	44	Ground	No
   	45

Fig 1: Checking Continuity Between NAVI Control Unit & Display Control Unit And NAVI Control Unit & Ground

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

OK or NG 

OK: GO TO 3.

NG: Repair harness or connector.

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  .