Av Communication Line Check (Between Display Control Unit And NAVI Control Unit

WARNING: This page is about a different car, the 2005 Nissan Armada. 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
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector B152 and display control unit connector M95.
3. Check continuity between NAVI control unit and display control unit.
  
  Fig 1: Connector Terminal Continuity Specification Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between NAVI control unit and ground.
  
  Fig 2: Checking Continuity Between NAVI Control Unit & Display Control Unit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Connector Terminal Continuity Specification Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 REMOVAL AND INSTALLATION OF DISPLAY CONTROL UNIT .