Vehicle Condition Setting Is Not Possible.

WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS
1. Disconnect connectors of combination meter, BCM, and AV and NAVI control unit.
2. Check continuity AV and NAVI control unit and BCM.
  
  Fig 1: Checking Continuity Between AC & NACI Control Unit & BCM
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Identifying Terminal Continuity Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check continuity between AV and NAVI control unit and ground.
  
  Fig 3: Checking Continuity Between AC & NAVI Control Unit & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK >> GO TO 2.

NG >> Repair harness or connector.
CHECK COMMUNICATION SIGNAL (AV-ME)
1. Connect connectors of combination meter, BCM, and AV and NAVI control unit.
2. Turn ignition switch ON.
3. Check voltage signal between AV and NAVI control unit harness connector B29 terminal 33 (LG) and ground with CONSULT-II or oscilloscope.
  1. 33 (LG) - Ground: Refer to " TERMINALS AND REFERENCE VALUE FOR AV AND NAVI CONTROL UNIT " .
  Fig 4: Checking voltage Signal Between AV & NAVI Control Unit Harness Connector & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK >> GO TO 3.

NG >> Replace AV and NAVI control unit.
CHECK COMMUNICATION SIGNAL (ME-AV)
1. Turn ignition switch ON and display "VEHICLE ELECTRONIC SYSTEMS" screen.
2. Check voltage signal between AV and NAVI control unit harness connector B29 terminal 32 (PU) and ground with CONSULT-II or oscilloscope.
  1. 32 (PU) - Ground: Refer to " TERMINALS AND REFERENCE VALUE FOR AV AND NAVI CONTROL UNIT " .
  Fig 5: Checking Voltage Signal Between AV & NAVI Control Unit Harness Connector & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK >> Replace AV and NAVI control unit.

NG >> Replace BCM.