Circuit/System Testing
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF/vehicle OFF, disconnect the GPS coax cable connector at the K73 Telematics Communication Interface Control Module.
- Connect the EL-49903-1 OnStar Test Antenna, Navn-Cell Comn to the K73 Telematics Communication Interface Control Module. Place the test antenna on the roof of the vehicle, ignition ON/vehicle in Service Mode.
- 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 that the OnStar advisor can locate the vehicle.
- If DTC B2462 is set or the advisor can not locate the vehicle
- Ignition OFF/vehicle OFF, disconnect the EL-49903-1 OnStar Test Antenna, Navn-Cell Comn from the K73 Telematics Communication Interface Control Module
- Disconnect the GPS coax cable at the T2RR Antenna - Roof Rear.
- 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.
- If the coax cable passes the test
- If the coax cable does not pass the test
- Test or replace the T2RR Antenna - Roof Rear.