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Home >> Saturn >> 2006 >> Ion Red Line >> Repair and Diagnosis >> Electrical >> Instrument Panel System Displays, Gauges And Console >> Diagnostic Information and Procedures >> Speedometer and/or Odometer Inaccurate or Inoperative >> Circuit/System Testing

Circuit/System Testing

  1. Install a scan tool
  2. Raise the vehicles drive wheels
  3. Start the engine
  4. Place the transmission into drive
  5. With the scan tool, observe the Vehicle Speed Sensor (VSS) parameter in the ECM/PCM Engine Data list.
    • If the VSS parameter does not match the speedometer display, replace the instrument panel cluster.
    • If the odometer is not operating properly, replace the instrument panel cluster.