When Malfunctioning Connection Between Display Control Unit and NAVI Control Unit

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

OK or NG

1. OK: GO TO 2.
2. NG: Repair 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 harness connector B207 terminals 44 (L), 45(P) and display control unit harness connector M76 terminals 32 (BR), 34 (Y).

   44 - 32: Continuity should exist. 

   45 - 34: Continuity should exist. 

4. Check continuity between NAVI control unit harness connector B207 terminals 44 (L), 45 (P) and ground.

   44, 45 - Ground: Continuity should not exist. 

   Fig 1: Checking Continuity Between NAVI Control Unit Harness Connector Terminals And Display Control Unit Harness Connector Terminals

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

OK or NG

1. OK: GO TO 3.
2. 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

1. OK: INSPECTION END.
2. NG: Replace display control unit.