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Power Supply and Ground Circuit Check for Display

WARNING: This page is about a different car, the 2003 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK 1: POWER SUPPLY CIRCUIT 
    1. Disconnect display connector.
    2. Turn ignition switch ON.
    3. Check voltage between display unit harness connector M38 terminals 2 (L/W), 3 (L/Y) and ground.
      1. Approx. 9 V 

    OK or NG

    1. OK : GO TO 2.
    2. NG : GO TO 3.
    Fig 1: Checking Voltage Between Display Unit Harness Connector M38 Terminals 2, 3 And Ground
    G03360087Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK GROUND CIRCUIT 

    Check continuity between display and ground as follows.

    DISPLAY CONNECTOR GROUND CIRCUIT CHECK CHART

    Terminals Ignition switch Continuity
    (+) (-)
    Connector Terminal (Wire color)
    M38 1(B) Ground OFF Yes

    OK or NG

    1. OK : INSPECTION END.
    2. NG : Repair harness.
    Fig 2: Checking Continuity Between Display Connector Terminals And Ground
    G03360088Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK POWER SUPPLY CIRCUIT 

    Check voltage between display control unit harness connector M42 terminals 2 (L/W), 4 (L/Y) and ground.

    1. Approx. 9 V 

    OK or NG

    1. OK : GO TO 4.
    2. NG : Repair harness.
    Fig 3: Checking Voltage Between Display Control Unit Harness Connector M42 Terminals 2,4 And Ground
    G03360089Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK HARNESS 
    1. Turn ignition switch OFF.
    2. Disconnect display control unit connector.
    3. Check continuity between display control unit harness connector M42 terminals 2 (L/W), 4 (L/Y) and display harness connector M38 terminals 2 (L/W), 3 (L/Y).
      1. 2-2: Continuity should exist. 
      2. 4-3: Continuity should exist. 
    4. Check continuity between display and ground.
    DISPLAY CONNECTOR HARNESS CHECK CHART

    Terminals Continuity
    Display (+) (-)
    Connector Terminal (Wire color)
    M38 2 (L/W) Ground No
    3 (L/Y)

    OK or NG

    1. OK : Replace display control unit.
    2. NG : Repair harness.
    Fig 4: Checking Continuity Between Display Control Unit Harness Connector M42 Terminals 2,4 And Display Harness Connector M38 Terminals 2,3
    G03360090Courtesy of NISSAN MOTOR CO., U.S.A.
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