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Home › Nissan-Datsun › 2003 › Frontier Base, Automatic › Repair and Diagnosis › External Pages › Different car › Section 190 (Automatic Speed Control Device) › Automatic Speed Control Device (ASCD) › Trouble Diagnoses › Vehicle Speed Sensor Check › 2. Check Vehicle Speed Input

2. Check Vehicle Speed Input

WARNING: This page is about a different car, the 2004 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.
  1. Apply wheel chocks and jack up drive wheel.
  2. Disconnect ASCD control unit harness connector.
  3. Check voltage between control unit connector M119 terminal 22 (G/B) and ground while turning drive wheel slowly by hand.
    Fig 1: Checking Vehicle Speed Input
    G00774620Courtesy of NISSAN MOTOR CO., U.S.A.

Yes or No? 

  1. Yes: Vehicle speed sensor is OK.
  2. No: Check harness for open or short between ASCD control unit connector M119 terminal 22 (G/B) and combination meter connector M39 terminal 37 (G/B).
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