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Home >> Chevrolet >> 2012 >> Impala LS, Gas >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays And Gauges >> Diagnostic Information and Procedures >> Instrument Cluster Gauges Malfunction >> Circuit/System Verification

Circuit/System Verification

IMPORTANT:

If the suspect gauge is the speedometer, the drive wheels of the vehicle must be raised and the transmission must be placed in drive or first gear.

  1. Ignition ON, perform the IPC gauge sweep test with the scan tool. Verify that all the gauges sweep from their low to high position.
    • If any gauges do not sweep from their low to high position, replace the IPC.
  2. Engine ON, transmission in drive or first gear, verify the scan tool Vehicle Speed parameter matches the speedometer display.
    • If the Vehicle Speed parameter does not match the speedometer display, test or replace the IPC.
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