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Circuit/System Testing

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. Ignition OFF, disconnect the appropriate harness connector at the A11 Radio.
  2. Disconnect the X1 harness connector at the K73 Telematics Communication Interface Control Module. Ignition On/Vehicle in Service Mode.
  3. Test for less than 1 V between the signal circuit terminal listed below and ground.
    • Voice recognition audio signal terminal 14
    • Voice recognition audio low reference terminal 15
    • If 1 V greater 

      Repair the short to voltage on the circuit.

    • Go to next step: If less than 1 V 
  4. Ignition OFF.
  5. Test for infinite resistance between the signal circuits listed below and ground:
    • Voice recognition audio signal terminal 14
    • Voice recognition audio low reference terminal 15
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • Go to next step: If infinite resistance 
  6. Test for less than 5 Ω between the terminals listed below:
    • K73 Telematics Communication Interface Control Module signal circuit terminal 15 X1 and the other end of the circuit.
    • K73 Telematics Communication Interface Control Module low reference circuit terminal 14 X1 and the other end of the circuit.
    • If 5 Ω greater 

      Repair the open/high resistance in the circuit.

    • Go to next step: If less than 5 Ω 
  7. Replace the A11 Radio. Connect all harness connectors.
    8. NOTE:

    Refer to the Owner's Manual and/or the Navigation System Owner's Manual for voice recognition use and commands.

  8. Begin voice recognition for the infotainment system and clearly speak one of the available commands.
  9. Verify the infotainment system responds correctly to the command.
    • If the infotainment system does not respond correctly to the command 
    1. Clearly speak a different command.
    2. Verify the infotainment system responds correctly to the command.
      • If the infotainment system does not respond correctly to any commands, replace the K73 Telematics Communication Interface Control Module.
    • Go to next step: If the infotainment system responds correctly to the command 
  10. All OK
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