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Home >> Cadillac >> 2008 >> STS V >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays & Gages >> Diagnostic Information and Procedures >> Instrument Cluster Gages Inoperative >> Circuit/System Testing

Circuit/System Testing

IMPORTANT: If the suspect gage is the speedometer, the drive wheels of the vehicle must be raised and the transmission must be placed in drive or first gear. Refer to Lifting and Jacking the Vehicle .
  1. Ignition ON and the scan tool installed, perform the IPC Gage Sweep Test in the IPC Output Controls. Verify that all gage dials move from the minimum to the maximum value and back to the gage minimum value.
    • If the gages do not perform the IPC Gage Sweep Test, replace the IPC.
  2. With the drive wheels raised start the engine and place the vehicle transmission in drive or the first gear. Verify that the speedometer value matches the scan tool Vehicle Speed parameter in the ECM Engine Data List.
    • If the speedometer is incorrect, test or replace the IPC.
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