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Home >> Chevrolet >> 2015 >> Volt >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Cellular System, Entertainment System And Navigation System >> Diagnostic Information and Procedures >> No Global Positioning System (GPS) Reception >> Circuit/System Testing >> With Navigation System

With Navigation System

  1. Vehicle OFF, disconnect the T4G Cellular Phone, Navigation and Digital Radio Antenna coax cable at the T15 Navigation Antenna Signal Splitter.
    NOTE: You must perform Circuit/System Verification  before proceeding with Circuit/System Testing.
  2. Attach the EL-49903-1 OnStar® test antenna to the T15 Navigation Antenna Signal Splitter. Place the test antenna on the roof of the vehicle, vehicle in Service Mode.
  3. Verify DTC B2462 is not set or that the OnStar® advisor can locate the vehicle.
    • If DTC B2462 is not set or the advisor can locate the vehicle 
    1. Test the coax cable between the T15 Navigation Antenna 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
    2. Replace the T4G cellular phone, navigation and digital radio antenna.
    • If DTC B2462 is set or if the advisor can not locate the vehicle 
  4. Vehicle OFF, disconnect the GPS and cellular coax cable connector at the K73 Telematics Communication Interface Control Module.
  5. Attach the EL-49903-1 OnStar® test antenna to the EL-49903-5 combiner. Using the EL-49903-6 brown -F coax cable attach the combiner to the K73 Telematics Communication Interface Control Module. Place the test antenna on the roof of the vehicle, vehicle in Service Mode.
  6. Verify DTC B2462 is not set or that the OnStar® advisor can locate the vehicle.
    • If DTC B2462 is set or the advisor can not locate the vehicle. 

      Replace the K73 Telematics Communication Interface Control Module.

    • If DTC B2462 is not set or the advisor can locate the vehicle. 
  7. Vehicle OFF.
  8. Test the coax cable between the T15 Navigation Antenna 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. 
  9. Vehicle OFF, disconnect the GPS coax cable at the A11 Radio.
  10. Attach the EL-49903-1 OnStar® test antenna to the A11 Radio and place the test antenna on the roof of the vehicle.
  11. Vehicle in Service Mode.
  12. Verify DTC B2462 is not set or that the NO GPS symbol/message is not displayed on the radio.
    • If DTC B2462 is set or the NO GPS symbol/message is displayed 

      Replace the A11 Radio

    • If DTC B2462 is not set or if the NO GPS symbol/message is not displayed. 
  13. Vehicle OFF.
  14. Test the coax cable between the T15 Navigation Antenna 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. 
  15. Test or replace the T15 Navigation Antenna Signal Splitter.
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