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Home >> Buick >> 2020 >> Envision Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 182 (Cellular, Entertainment, And Navigation System) >> Diagnostic Information and Procedures >> Application Malfunction >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2020 Buick Regal TourX, 2020 Buick Regal, 2019 Buick Regal TourX, and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify the application is installed on the mobile device and is up to date.
    • If the application is not installed or is not up to date. 

      Install or update the application on the device.

    • Go to next step: If the application is installed on the mobile device and is up to date 
  2. Verify the application operates correctly on the mobile device.
    • If the application is not operating correctly on the mobile device. 

      Refer to the application web site.

    • Go to next step: If the application is operating correctly on the mobile device. 
  3. Verify the K74 Human Machine Interface Control Module calibrations are current.
    • If the calibrations are not current 

      Reprogram the K74 Human Machine Interface Control Module and re-evaluate the concern.

    • Go to next step: If no update calibrations are available 
  4. Verify the application is installed on the K74 Human Machine Interface Control Module and is up to date.
    • If the application is not installed or is not up to date. 

      Install or update the application and re-evaluate the concern.

    • Go to next step: If the application is installed and is up to date 
  5. Ignition On/Vehicle in Service Mode. Infotainment system ON.
  6. Verify the mobile device can connect to the infotainment system. Refer to the owner's manual for information on the preferred connection method for the device.
    • If the mobile device cannot connect to the vehicle infotainment system. 
    • Go to next step: If the mobile device connects to the vehicle infotainment system. 
  7. Launch the application.
  8. Verify the application operates properly with the vehicle infotainment system.
    • If the application does not function properly 

      Refer to diagnostic aids.

    • Go to next step: If the application functions properly 
  9. All OK.
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