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Home >> GMC >> 2021 >> Terrain SLT, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular, Entertainment, And Navigation System >> Diagnostic Information and Procedures >> Radio Information Display Malfunction (IOS/IOT/IOU) >> Circuit/System Verification

Circuit/System Verification

  1. Verify no other DTCs are present.
    • Go to next step: If no other DTCs are present 
  2. Ignition ON, infotainment system ON.
  3. Using a scan tool, under control functions select Info Display Test.
    • If the Info Display can not display the test image. 

      Refer to Circuit/System Testing.

    • Go to next step: If the Info Display can display the test image. 
  4. All OK
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