AV Communication Line Check (Between Display control unit and A/C and AV Switch)

CHECK A/C AND AV SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display control unit connector and A/C and AV switch connector.
3. Check continuity between display control unit and A/C and AV switch.
  
  Fig 1: Continuity Between Display Control Unit And A/C And AV Switch
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check continuity between display control unit and ground.
  
  Fig 2: Checking Continuity Between Display Control Unit And A/C And AV Switch
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Continuity Between Display Control Unit And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 2.
2. NG: Repair harness or connector.
CHECK AV COMMUNICATION SIGNAL
1. Connect display control unit connector and A/C and AV switch connector.
2. Turn ignition switch ON.
3. Check signal between display control unit harness connector M76 terminal 28 (B/R) and 30 (W/R) with CONSULT-II or oscilloscope.
  28 (B/R), 30 (W/R) - Ground: Refer to " Terminals and Reference Value for Display Control unit ".
OK or NG
1. OK: Replace A/C and AV switch.
2. NG: Replace display control unit.
  
  Fig 4: Checking Signal Between Display Control Unit Harness Connector M76 Terminal 28 (B/R) And 30 (W/R) With CONSULT-II Or Oscilloscope
  Courtesy of NISSAN MOTOR CO., U.S.A.