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Power Supply and Ground Circuit Check for Display Unit

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FUSE 

    Check if the following fuses for display unit are blown.

    DISPLAY UNIT CHART

    Unit Power souse Fuse No.
    Display unit Battery power 3
    Ignition switch ACC or ON 6
    Ignition switch ON or START 12

    OK or NG

    1. OK: GO TO 2.
    2. NG: If fuse is blown be sure to eliminate case of malfunction before installing new fuse. Refer to POWER SUPPLY ROUTING CIRCUIT .
  2. CHECK POWER SUPPLY CIRCUIT 
    1. Disconnect display unit connector.
    2. Check voltage between display unit connector and ground.
    DISPLAY UNIT CONNECTOR TERMINALS VOLTAGE SPECIFICATIONS

    Terminals Ignition switch position
    (+) (-)OFF ACC ON
    Connector Terminal (Wire color)
    M93 1 (Y) Ground Battery voltage Battery voltage Battery voltage
    2(V) Ground OV Battery voltage Battery voltage
    3(G) Ground OV OV Battery voltage
    Fig 1: Checking Voltage Between Display Unit Connector & Ground
    G03496259Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: GO TO 3.
    2. NG: Check harness for open or short between display and fuse.
  3. CHECK GROUND CIRCUIT 

    Check continuity between display unit harness connector M93 terminal 6 (B) and ground.

    Continuity should exist. 

    OK or NG

    1. OK: INSPECTION END.
    2. NG: Repair ground harness.
      Fig 2: Checking Continuity Between Display Unit Harness Connector M93 Terminal 6 (B) And Ground
      G03496260Courtesy of NISSAN MOTOR CO., U.S.A.
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