2003 Nissan-Datsun Sentra SE-R, AutomaticFACTORY OEM SERVICE PROCEDURE

Vehicle Speed Signal Check

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS 
    1. Turn ignition switch OFF.
    2. Disconnect display unit connector and combination meter connector.
    3. Check continuity between display unit harness connector M93 terminal 7 (P/L) and combination meter harness connector M24 terminal 14 (P/L).
      1. Continuity should exist. 
  2. Check continuity between display unit harness connector M93 terminal 7 (P/L) and ground.
    1. Continuity should not exist. 

    OK or NG 

    1. OK: GO TO 2.
    2. NG: Repair harness.
      Fig 1: Checking Continuity Between Display Unit Harness Connector M93 Terminal 7 (P/L) And Ground
      G03501112Courtesy of NISSAN MOTOR CO., U.S.A.
  3. CHECK VEHICLE SPEED SIGNAL 
    1. Drive vehicle at a constant speed.
    2. Check the signal between display unit harness connector M93 terminal 7 (P/L) and ground with CONSULT-II or oscilloscope.
      1. 7 (P/L) - Ground: Refer to "Terminals And Reference Value For Display Unit  "

      OK or NG 

      1. OK: Replace display unit. Refer to "Removal And Installation Of Display Unit  ".
      2. NG: Check combination meter system. Refer to "VEHICLE SPEED SIGNAL INSPECTION ".
      Fig 2: Checking Signal Between Display Unit Harness Connector M93 Terminal 7
      G03501113Courtesy of NISSAN MOTOR CO., U.S.A.
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  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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