Vehicle Condition Setting Is Not Possible

CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect connectors of AV control unit, combination meter and BCM.
3. Check continuity AV control unit harness connector M77 terminal 34 (LG) and BCM harness connector M4 terminal 31 (LG).
  1. 34 (LG) - 31 (LG): Continuity should exist.
4. Check continuity AV control unit harness connector M77 terminal 35 (PU) and BCM harness connector M4 terminal 30 (PU).
  1. 35 (PU) - 30 (PU): Continuity should exist.
  Fig 1: Disconnecting Connectors AV Control Unit, Combination Meter And BCM
  Courtesy of NISSAN MOTOR CO., U.S.A.
5. Check continuity between AV control unit harness connector M77 terminals 34 (LG), 35 (PU) and ground.
  1. 34 (LG) - Ground
  2. 35 (PU) - Ground: Continuity should not exist.
OK or NG
1. OK: GO TO 2.
2. NG: Repair harness or connector.
CHECK COMMUNICATION SIGNAL (AV-ME)
1. Connect connectors of AV control unit, combination meter and BCM.
2. Turn ignition switch ON and display "VEHICLE ELECTRONIC SYSTEMS" screen.
3. Check voltage signal between AV control unit harness connector M77 terminal 34 (LG) and ground.
  
  Fig 2: Identifying Communication Signal Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Connecting Connectors Of AV Control Unit, Combination Meter And BCM
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 3.
2. NG: Replace AV control unit.
CHECK COMMUNICATION SIGNAL (ME-AV)
1. Turn ignition switch ON and display "VEHICLE ELECTRONIC SYSTEMS" screen.
2. Check voltage signal between AV control unit harness connector M77 terminal 35 (PU) and ground.
  
  Fig 4: Identifying Voltage Signal Between AV Control Unit Harness Connector M77 Terminal 35 (PU) Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Communication Signal (ME-AV) Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Replace AV control unit.
2. NG: Replace BCM.