RGB Image Is Rolling

Symptom: Map screen is rolling.

1. CHECK HARNESS 
   1. Turn ignition switch OFF.
   2. Disconnect NAVI control unit and display control unit connectors.
   3. Check continuity between NAVI control unit harness connector (A) B207 terminal 48 and display control unit harness connector (B) M76 terminal 43.

      48 - 43 : Continuity should exist. 

   4. Check continuity between NAVI control unit harness connector (A) B207 terminal 48 and ground.

      48 - Ground : Continuity should not exist. 

      Fig 1: Identifying Continuity Between NAVI Control Unit Harness Connector (A) B207 Terminal 48 And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.

   OK or NG 

   OK : GO TO 2.

   NG : Repair harness or connector.

2. CHECK RGB SYNCHRONIZING SIGNAL 
   1. Connect NAVI control unit and display control unit connectors.
   2. Turn ignition switch ON.
   3. When displaying RGB image, check voltage waveform between NAVI control unit harness connector B207 terminal 48 and ground with CONSULT-II or oscilloscope.

      48 - Ground: 

      Fig 2: Identifying Voltage Waveform

      Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 3: Identifying Voltage Waveform Between NAVI Control Unit Harness Connector B207 Terminal 48 And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.

   OK or NG 

   OK : GO TO 3.

   NG : Replace NAVI control unit.

3. CHECK HARNESS 
   1. Turn ignition switch OFF.
   2. Disconnect display control unit and display connectors.
   3. Check continuity between display control unit harness connector (A) M76 terminal 56 and display harness connector (B) M63 terminal 19.

      56 - 19 : Continuity should exist. 

   4. Check continuity between display control unit harness connector (A) M76 terminal 56 and ground.

      56 - Ground : Continuity should not exist. 

      Fig 4: Identifying Continuity Between Display Control Unit Harness Connector (A) M76 Terminal 56 And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.

   OK or NG 

   OK : GO TO 4.

   NG : Repair harness or connector.

4. CHECK RGB SYNCHRONIZING SIGNAL 
   1. Connect display control unit and display connectors.
   2. Turn ignition switch ON.
   3. When displaying RGB image, check voltage waveform between display control unit harness connector M76 terminal 56 and ground with CONSULT-II or oscilloscope.

      56 - Ground: 

      Fig 5: Identifying Voltage Waveform

      Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 6: Identifying Voltage Waveform Between Display Control Unit Harness Connector M76 Terminal 56 And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.

   OK or NG 

   OK : Replace display.

   NG : Replace display control unit.