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Home >> Acura >> 1993 >> Legend Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Vehicle Speed Sensor (VSS)
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Vehicle Speed Sensor (VSS)

  1. VSS is located at left front wheel. Connect test harness at ECM. Do not disconnect ECM or VSS harness connectors. Block rear wheels. Set parking brake. Raise and support front of vehicle. Connect voltmeter between test harness terminals C2 (positive) and D21 or D22 (negative).
  2. Turn ignition on. Slowly rotate left front wheel. Voltage should pulsate between zero and 5 volts. If voltage pulsates as specified, go to next step. If voltage does not pulsate as specified, check for open or short in Yellow/Red wire between ECM terminal C2 and speed sensorterminal No. 3. If wire is okay, replace faulty VSS or ECM.
  3. Substitute a known-good ECM, and retest. If problem goes away, replace ECM.
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