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 and BCM harness connector M4 terminal 31.
  34 - 31 : Continuity should exist.
4. Check continuity AV control unit harness connector M77 terminal 35 and BCM harness connector M4 terminal 30.
  35 - 30 : Continuity should exist.
5. Check continuity between AV control unit harness connector M77 terminals 34, 35 and ground.
  34 - Ground : Continuity should not exist.
  
  35 - Ground
OK or NG
1. OK : GO TO 2.
2. NG : Repair harness or connector.
  
  Fig 1: Identifying Continuity Between AV Control Unit Harness Connector M77 Terminals 34, 35 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 and ground.
  34 - Ground:
  
  Fig 2: Voltage Signal Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : GO TO 3.
2. NG : Replace AV control unit.
  
  Fig 3: Identifying Voltage Signal Between AV Control Unit Harness Connector M77 Terminal 34 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 and ground.
  35 - Ground:
  
  Fig 4: Voltage Signal Graph
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : Replace AV control unit.
2. NG : Replace BCM.
  
  Fig 5: Identifying Voltage Signal Between AV Control Unit Harness Connector M77 Terminal 35 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.