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Home >> GMC >> 2018 >> Terrain SL >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Cellular System, Entertainment System, And Navigation System - Diagnostic Information And Procedures >> Diagnostic Information And Procedures >> DTC B127E: Front Video Display Output Signal (IO5/IO6 Without MAH/MBC) >> Circuit/System Verification
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Circuit/System Verification

  1. Verify no DTCs are present.
    • Go to next step: If no DTCs are present 
  2. Ignition ON, infotainment system ON.
  3. Using a scan tool, access the HMI control functions and 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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