Circuit/System Verification

WARNING: This page is about a different car, the 2018 Buick Regal TourX and 2018 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.

Verify DTC B127E is not set.
- If DTC B127E is set.
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If DTC B127E is not set.
Ignition ON/vehicle in Service Mode, A11 Radio ON.
Verify the P17 Info Display Module turns on and information is shown on the display.
- If the P17 Info Display Module does not turn on, or information is not shown clearly in the display.
  Refer to Circuit/System Testing - Blank Screen
- Go to next step: If the P17 Info Display Module turns on and information is shown on the display.
Verify the touch screen feature functions by touching a selection on the display.
- If the display does not respond to the touch screen selection
  Refer to Circuit/System Testing - Touch Screen
- Go to next step: If the display responds to the touch screen selection
All OK.