LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2002 >> Sentra SE-R, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1702 (Audio, Visual, Navigation & Telephone System) >> Navigation System >> Power Supply and Ground Circuit Check for Display Unit
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Power Supply and Ground Circuit Check for 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 POWER SUPPLY AND GROUND CIRCUIT FOR DISPLAY CONTROL UNIT 
    1. Check power supply and ground circuit for display control unit. Refer to , "POWER SUPPLY AND GROUND CIRCUIT CHECK FOR DISPLAY CONTROL UNIT "

    OK or NG 

    OK: GO TO 2.

    NG: Repair malfunctioning part.

  2. CHECK POWER SUPPLY CIRCUIT FOR DISPLAY UNIT 
    1. Disconnect display unit connector.
    2. Turn ignition switch ON.
    3. Check voltage between display unit harness connector M93 terminals 2, 3 and ground.

    Approx. 9V 

    OK or NG 

    OK: GO TO  4.

    NG: GO TO 3.

    Fig 1: Checking Voltage Between Display Unit Harness Connector M93 Terminals 2, 3 And Ground
    G04177806Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK HARNESS 
    1. Turn ignition switch OFF.
    2. Disconnect display unit connector M93 and display control unit connector M94.
    3. Check continuity between display control unit harness connector M94 terminals 2, 4 and display unit harness connector M93 terminals 2, 3.
      CONNECTOR TERMINALS CONTINUITY REFERENCE CHART

      Terminals Continuity
      Display control unit Display unit
      Connector Terminal Connector Terminal
      M94 2 M93 2 Yes
      4 3
    4. Check continuity between display unit and ground.
    CONNECTOR TERMINALS CONTINUITY REFERENCE

    Terminals Continuity
    Display unit -
    Connector Terminal
    M93 2 Ground No
    3

    OK or NG 

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

    NG: Repair harness.

    Fig 2: Checking Continuity Between Display Unit And Ground
    G04177807Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Check continuity between display unit harness connector M93 terminals 13, 14 and ground.

    Continuity should exist. 

    OK or NG 

    OK: GO TO  6.

    NG: GO TO 5.

    Fig 3: Checking Continuity Between Display Unit Harness Connector M93 Terminals 13, 14 And Ground
    G04177808Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK HARNESS 
    1. Disconnect display control unit connector M94.
    2. Check continuity between display unit harness connector M93 terminals 13, 14 and display control unit harness connector M94 terminals 5, 7.

    Continuity should exist. 

    OK or NG 

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

    NG: Repair harness.

    Fig 4: Checking Continuity Between Connector Terminals 13, 14 And Connector Terminals 5, 7
    G04177809Courtesy of NISSAN MOTOR CO., U.S.A.
  6. CHECK GROUND CIRCUIT 

    Check continuity between display unit and ground as follows.

    CONNECTOR TERMINALS CONTINUITY REFERENCE

    Terminals Ignition switch Continuity
    Connector Terminal -
    M93 1 Ground OFF Yes

    OK or NG 

    OK: Inspection End.

    NG: Repair harness.

    Fig 5: Checking Continuity Between Display Unit And Ground
    G04177810Courtesy of NISSAN MOTOR CO., U.S.A.
scientia non olet · About LEMON Manuals