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Home >> Buick >> 2016 >> Envision >> Repair and Diagnosis >> External Pages >> Different car >> Section 180 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B2462: Global Positioning System >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2016 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.

without Navigation System

    NOTE:

    You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

  1. Ignition OFF, disconnect the GPS and cellular coax cable connector at the K73 Telematics Communication Interface Control Module.
  2. 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, ignition ON.
  3. 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 
  4. Test the coax cable between the K73 Telematics Communication Interface Control Module 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 
  5. Test or replace the T4G Cellular Phone, Navigation, and Digital Radio Antenna.

with Navigation System

    NOTE:

    You must perform the Circuit/System Verification before proceeding with Circuit/System Testing.

  1. Ignition OFF, disconnect the T4G Cellular Phone, Navigation, and Digital Radio Antenna coax cable at the T15 Navigation Antenna Signal Splitter.
  2. Attach the EL-49903-1 OnStar test antenna to the EL-49903-5 combiner. Using the EL-49903-7 grey - G coax cable attach the combiner to the T15 Navigation Antenna Signal Splitter. Place the test antenna on the roof of the vehicle, ignition ON.
  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. Ignition 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, ignition ON.
  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. Ignition 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. Ignition OFF, disconnect the blue GPS coax cable connector at the K74 Human Machine Interface Control Module.
  10. Attach the EL-49903-1 OnStar test antenna blue connector to the K74 Human Machine Interface Control Module and place the test antenna on the roof of the vehicle.
  11. Ignition ON.
  12. Verify DTC B2462 is not set or that the NO GPS symbol/message is not displayed on the radio display.
    • If DTC B2462 is set or the NO GPS symbol/message is displayed 

      Replace the K74 Human Machine Interface Control Module

    • If DTC B2462 is not set or if the NO GPS symbol/message is not displayed. 
  13. Ignition OFF.
  14. Test the coax cable between the T15 Navigation Antenna Signal Splitter and the K74 Human Machine 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. 
  15. Test or replace the T15 Navigation Antenna Signal Splitter.
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