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

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

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

OK or NG
1. OK : GO TO 2.
2. NG : Check the malfunctioning parts.
CHECK HARNESS
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.
  
  Fig 1: Terminal Continuity Specification
  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 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Terminal Continuity Specification
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : GO TO 3.
2. NG : Repair harness or connector.
SELF-DIAGNOSIS OF DCU
1. Replace same normal display 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 : Replace display control unit.
2. NG : Replace NAVI control unit.