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

  1. CHECK POWER SUPPLY AND GROUND CIRCUIT 
    1. Check system of power supply and ground circuit audio unit. Refer to POWER SUPPLY CIRCUIT INSPECTION .

    OK or NG

    1. OK: GO TO 2.
    2. NG: Check the malfunctioning parts.
  2. CHECK HARNESS 
    1. Turn ignition switch OFF.
    2. Disconnect audio unit connector and display control unit connector.
    3. Check continuity between audio unit and display control unit.
      TERMINALS CONTINUITY REFERENCE

      Terminals Continuity
      Display control unit (+) Audio unit (-)
      Connector Terminal (Wire color) Connector Terminal (Wire color)
      M95 40(R) M46 23 (R) Yes
      42(L) 21 (L)
    4. Check continuity between display control unit and ground.
    TERMINALS CONTINUITY REFERENCE

    Terminals Continuity
    Display control unit (+) (-)
    Connector Terminal (Wire color)
    M95 40(R) Ground No
    42(L)
    Fig 1: Checking Continuity Between Display Control Unit & Ground
    G03496397Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: GO TO 3.
    2. NG: Repair harness or connector.
  3. CHECK 1: AUDIO-TX COMMUNICATION SIGNAL 
    1. Connect display control unit connector.
    2. Turn ignition switch ON.
    3. Check voltage between display control unit harness connector M95 terminal 40 (R) and ground.
      1. Approx. 3.5 V or more 

    OK or NG

    1. OK: GO TO 4.
    2. NG: Replace display control unit. Refer to REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT  .
    Fig 2: Checking Voltage Between Display Control Unit Harness Connector Terminal & Ground
    G03496398Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK 2: AUDIO-RX COMMUNICATION SIGNAL 
    1. Connect audio unit connector.
    2. Turn ignition switch ON.
    3. Check voltage between display control unit harness connector M95 terminal 42 (L) and ground.
      1. Approx. 3.5 V or more 

    OK or NG

    1. OK: GO TO 5.
    2. NG: Replace audio unit. Refer to CENTER STACK ASSEMBLY .
    Fig 3: Checking Voltage Between Display Control Unit Harness Connector Terminal & Ground
    G03496399Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK 3: AUDIO-TX COMMUNICATION SIGNAL 
    1. Turn ignition switch ON.
    2. Check signal between display control unit harness connector M95 terminal 40 (R) and ground with CONSULT-II or oscilloscope.
      1. 40 (R) - Ground  : Refer to "TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT  ".

    OK or NG

    1. OK: GO TO 6.
    2. NG: Replace audio unit. Refer to CENTER STACK ASSEMBLY .
    Fig 4: Checking Signal Between Display Control Unit Harness Connector Terminal & Ground With CONSULT-II Or Oscilloscope
    G03496400Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK 4: AUDIO-RX COMMUNICATION SIGNAL 
    1. Turn ignition switch ON.
    2. Check signal between display control unit harness connector M95 terminal 42 (L) and ground with CONSULT-II or oscilloscope.
      1. 42 (L) - Ground:  Refer to "TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT  ".

    OK or NG

    1. OK: Replace audio unit. Refer to CENTER STACK ASSEMBLY .
    2. NG: Replace display control unit. Refer to REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT  .
    Fig 5: Checking Signal Between Display Control Unit Harness Connector Terminal & Ground With CONSULT-II Or Oscilloscope
    G03496401Courtesy of NISSAN MOTOR CO., U.S.A.
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