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Home >> Cadillac >> 2009 >> STS V >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Panel System Displays & Gauges >> Diagnostic Information and Procedures >> Head Up Display (HUD) Malfunction >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON, verify that the HUD image is displayed on the windshield.
  2. Ignition ON, verify that when the HUD switches are pressed and released the HUD scan tool parameters toggle between Active and Inactive.
    • If the parameters do not toggle between Active and Inactive, refer to Circuit/System Testing , under HUD Switch Malfunction.