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Home >> GMC >> 2018 >> Terrain SL >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System, And Navigation System - Diagnostic Information And Procedures >> Diagnostic Information And Procedures >> DTC B127E: Front Video Display Output Signal (IOS/IOT/IOU/IOR) >> Circuit/System Testing

Circuit/System Testing

  1. Vehicle OFF/Ignition OFF.
  2. Verify the LVDS interface cable is properly connected at the P17 Info Display Module and the A11 Radio and there is no damage to the cable or connections.
  3. Ignition ON/Vehicle in Service Mode, infotainment system ON.
  4. Verify the P17 Info Display Module displays an image.
    • If the P17 Info Display Module does not display an image. 

      Replace LVDS interface cable from the P17 Info Display Module to the A11 Radio.

  5. Ignition ON/Vehicle in Service Mode, infotainment system ON.
  6. Verify the P17 Info Display Module displays an image.
    • If the P17 Info Display Module does not display an image. 

      Replace the P17 Info Display Module.

  7. Ignition ON/Vehicle in Service Mode, infotainment system ON.
  8. Verify the P17 Info Display Module displays an image.
    • If the P17 Info Display Module does not display an image. 

      Replace A11 Radio.

    • Go to next step: If the P17 Info Display Module displays an image. 
  9. All OK.
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