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Without Navigation System

    NOTE:

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

  1. Ignition OFF/vehicle OFF, disconnect the GPS and cellular coax cable connector at the K73 Telematics Communication Interface Control Module.
  2. Attach both leads of the EL-49903 - 1 OnStar test antenna to the EL-49903 - 5 combiner. Using the EL-49903 - 6 coax cable attach the grey connector to the combiner and the brown connector 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.

    • Go to next step: 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 T2RR Antenna - Roof Rear. Refer to Component Testing .
    • If the coax cable does not pass the test 

      Replace the coax cable.

    • Go to next step: If the coax cable passes the test 
  5. Test or replace the T2RR Antenna - Roof Rear.
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