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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 93 (Instrument Panel System Displays And Gauges) >> Diagnostic Information and Procedures >> Speedometer and/or Odometer Inaccurate or Inoperative >> Circuit/System Testing

Circuit/System Testing

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  1. Ignition OFF, raise the vehicles drive wheels.
  2. Engine ON, transmission in drive, verify the scan tool Vehicle Speed Sensor parameter matches the speedometer display.
    • If the Vehicle Speed Sensor parameter does not match the speedometer display, replace the IPC.
  3. Verify that the odometer is operating properly.
    • If the odometer is not operating properly, replace the IPC.
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