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HOMESERVICE MANUALSBUICK2013REGAL TURBO PREMIUM, STANDARD TRANSREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 152 (CELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESNO GLOBAL POSITIONING SYSTEM (GPS) RECEPTIONCIRCUIT/SYSTEM TESTING (WITH NAVIGATION RADIO)
2013 Buick Regal Turbo Premium, Standard Trans

Circuit/System Testing (with Navigation Radio)

2013 Buick Regal Turbo Premium, Standard TransSECTION Circuit/System Testing (with Navigation Radio)
WARNING: This page is about a different car, the 2012 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • The vehicle may be equipped with sectioned coax. Test each section and replace only the faulty section, not the entire length of coax.
  • The following verification requires the vehicle to be outside with an unobstructed view of the southern sky. Allow 5 minutes after turning the ignition ON for the GPS satellites to acquire vehicle signal.
  1. Ignition OFF and all vehicle systems OFF, disconnect the coax cable at the T15 navigation signal splitter. It may take up to 2 minutes for all vehicle systems to power down.
  2. Using the EL-49903-3 kit (EL-49903-5 adapter and EL-49903-4 coax cable), connect the EL-49903  GM OnStar antenna diagnostic tool kit to the navigation signal splitter. Place the test antenna on the roof of the vehicle.
  3. Ignition ON.
  4. Verify that the customer GPS concern is still present.
    • If the GPS concern is not present 
    1. Ignition OFF, disconnect the coax cable at the T4G cellular phone, navigation and digital radio antenna.
    2. Test the coax cable between the T15 navigation signal splitter and the T4G cellular phone, navigation and digital radio antenna. Refer to Component Testing.
      • If the coax cable does not pass the test

        Replace the coax cable.

      • If the coax cable passes the test
    3. Test or replace the T4G cellular phone, navigation and digital radio antenna.
    • If the GPS concern is still present 
  5. Ignition OFF, disconnect the coax cable between the T15 navigation signal splitter and the K73 telematics communication interface control module.
  6. Using the EL-49903-3 kit (EL-49903-5 adapter and EL-49903-4 coax cable), connect the EL-49903  GM OnStar antenna diagnostic tool kit to the telematics communication interface module. Place the test antenna on the roof of the vehicle.
  7. Ignition ON.
  8. Verify that an OnStar advisor can locate the vehicle after performing a blue button press.
    • If the advisor can not locate the vehicle 

      Replace the K73 telematics communication interface control module.

    • If the advisor can locate the vehicle 
  9. Ignition OFF.
  10. Test the coax cable between the navigation signal splitter and the K73 telematics communication interface control module. Refer to Component Testing.
    • If the coax cable does not pass the test 

      Replace the coax cable.

    • If the coax cable passes the test 
  11. Ignition OFF, disconnect the coax cable between the T15 navigation signal splitter and the A11 radio.
  12. Connect the test antenna to the radio and place the test antenna on the roof of the vehicle.
  13. Ignition ON.
  14. Verify that the NO GPS symbol/message is not displayed on the radio.
    • If the NO GPS symbol/message is displayed 

      Replace the A11 Radio

    • If the NO GPS symbol/message is not displayed 
  15. Ignition OFF.
  16. Test the coax cable between the T15 navigation signal splitter and the A11 radio. Refer to Component Testing.
    • If the coax cable does not pass the test 

      Replace the coax cable.

    • If the coax cable passes the test 
  17. Test or replace the T15 navigation antenna signal splitter.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.