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

CHECK POWER SUPPLY AND GROUND CIRCUIT
1. Check power supply and ground circuit for NAVI control unit. Refer to POWER SUPPLY AND GROUND CIRCUIT CHECK FOR NAVI CONTROL UNIT .
OK or NG
- OK: GO TO 2.
- NG: Check the malfunctioning parts.
CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector M97 and display control unit connector M95.
3. Check continuity between NAVI control unit and display control unit.
  
  Fig 1: Connector Terminals Voltage Reference Chart
  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 & Display Control Unit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: NAVI Control Unit Connector Terminals Continuity Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 3.
- NG: Repair harness or connector.
CHECK AV COMMUNICATION SIGNAL
1. Connect NAVI control unit connector and display control unit connector.
2. Turn ignition switch ON.
3. Check signal between NAVI control unit harness connector M97 terminal 44 (L) and 45 (P) with CONSULT-II or oscilloscope.
  44 (L), 45 (P) - Ground: Refer to TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT .
OK or NG
- OK: Replace display control unit. Refer to REMOVAL AND INSTALLATION OF DISPLAY CONTROL UNIT .
- NG: Replace NAVI control unit. Refer to REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT .
  
  Fig 4: Checking Signal Between NAVI Control Unit Harness Connector M97 Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.