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

WARNING: This page is about a different car, the 2006 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS 
    1. Turn ignition switch OFF.
    2. Disconnect display unit connector M93 and display control unit connector M95.
    3. Check continuity between display control unit and display unit.
      CONNECTOR TERMINALS CONTINUITY REFERENCE

      Terminals Continuity
      Display control unit Display unit
      Connector Terminal Connector Terminal
      M95 36 M93 11 Yes
      38 22
    4. Check continuity between display control unit and ground.
    CONNECTOR TERMINALS CONTINUITY REFERENCE

    Terminals Continuity
    Display control unit -
    Connector Terminal
    M95 36 Ground No
    38
    Fig 1: Checking Continuity Between Display Control Unit And Ground
    G04177831Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK: GO TO 2.

    NG: Repair harness or connector.

  2. CHECK 1: COMMUNICATION SIGNAL (DCU-DSP) 
    1. Connect display unit connector.
    2. Turn ignition switch ON.
    3. Check voltage between display unit harness connector M93 terminal 11 and ground.

    Approx. 3.5V or more. 

    OK or NG 

    OK: GO TO 3.

    NG: Replace display unit. Refer to , "DISPLAY UNIT "

    Fig 2: Checking Voltage Between Display Unit Harness Connector M93 Terminal 11 And Ground
    G04177832Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK 2: COMMUNICATION SIGNAL (DSP-DCU) 
    1. Turn ignition switch OFF.
    2. Disconnect display unit connector M93.
    3. Connect display control unit connector.
    4. Turn ignition switch ON.
    5. Check voltage between display control unit harness connector M95 terminal 38 and ground.

    Approx. 3.5V or more. 

    OK or NG 

    OK: GO TO 4.

    NG: Replace display control unit. Refer to , "DISPLAY CONTROL UNIT "

    Fig 3: Checking Voltage Between Display Control Unit Harness Connector M95 Terminal 38 And Ground
    G04177833Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK 3: COMMUNICATION SIGNAL (DCU-DSP) 
    1. Turn ignition switch OFF.
    2. Connect display unit connector.
    3. Turn ignition switch ON.
    4. Check signal between display control unit harness connector M95 terminal 36 and ground with CONSULT-II or oscilloscope.

    36 - Ground: Refer to , " TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT  " 

    OK or NG 

    OK: GO TO 5.

    NG: Replace display control unit. Refer to , "DISPLAY CONTROL UNIT "

    Fig 4: Checking Signal Between Display Control Unit Connector M95 Terminal 36 And Ground
    G04177834Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK 4: COMMUNICATION SIGNAL (DSP-DCU) 
    1. Turn ignition switch ON.
    2. Check signal between display control unit harness connector M95 terminal 38 and ground with CONSULT-II or oscilloscope.

    38 - Ground: Refer to , " TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT  " 

    OK or NG 

    OK: Inspection End.

    NG: Replace display unit. Refer to , "DISPLAY UNIT "

    Fig 5: Checking Signal Between Display Control Unit Connector M95 Terminal 38 And Ground
    G04177835Courtesy of NISSAN MOTOR CO., U.S.A.
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