LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2004 >> Pathfinder LE, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 604 (Navigation System) >> Navigation System >> Audio Communication Line Check (Between Display Control Unit and Audio Unit)

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

WARNING: This page is about a different car, the 2004 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.
  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.
      CONNECTOR TERMINALS CONTINUITY

      Terminals Continuity
      Display control unit (+) Audio unit (-)
      Connector Terminal (Wire color) Connector Terminal (Wire color)
      M95 40 (W/L) M45 65 (W/L) Yes
      42 (O/L) 66 (O/L)
      Fig 1: Checking Continuity Between Audio Unit And Display Control Unit
      G03497604Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check continuity between display control unit and ground.
      CONNECTOR TERMINALS CONTINUITY

      Terminals Continuity
      Display control unit(+) (-)
      Connector Terminal (Wire color)
      M95 40 (W/L) Ground No
      42 (O/L)

    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 (O/L) 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 DISPLAY CONTROL UNIT .
    Fig 2: Checking Voltage Between Display Control Unit Harness Connector M95 Terminal 40 And Ground
    G03497605Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK 2: AUDIO-RX COMMUNICATION SIGNAL 
    1. Turn ignition switch OFF.
    2. Disconnect display control unit connector.
    3. Connect audio unit connector.
    4. Turn ignition switch ON.
    5. Check voltage between audio unit harness connector M45 terminal 66 (W/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 REMOVAL AND INSTALLATION FOR AUDIO UNIT .
    Fig 3: Checking Voltage Between Audio Unit Harness Connector M45 Terminal 66 And Ground
    G03497606Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK3: AUDIO-TX COMMUNICATION SIGNAL 
    1. Turn ignition switch OFF.
    2. Connect display control unit connector.
    3. Turn ignition switch ON.
    4. Check signal between display control unit harness connector M95 terminal 40 (O/L) and ground with CONSULT-II or oscilloscope.
      1. 40 (O/L) - 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 REMOVAL AND INSTALLATION FOR AUDIO UNIT .
    Fig 4: Checking Signal Between Display Control Unit Harness Connector M95 Terminal 40 And Ground
    G03497607Courtesy 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 (W/L) and ground with CONSULT-II or oscilloscope.
      1. 42 (W/L) - Ground: Refer to TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT .

    OK or NG

    1. OK:INSPECTION END.
    2. NG: Replace display control unit. Refer to REMOVAL AND INSTALLATION OF DISPLAY CONTROL UNIT .
    Fig 5: Checking Signal Between Display Control Unit Harness Connector M95 Terminal 42 And Ground
    G03497608Courtesy of NISSAN MOTOR CO., U.S.A.
scientia non olet · About LEMON Manuals