Circuit/System Testing
WARNING: This page is about a different car, the 2016 Chevrolet Trax and 2016 Buick Encore. 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 min after turning the ignition ON for the GPS satellites to acquire vehicle signal.
- Ignition OFF and all vehicle systems OFF, disconnect the violet primary cellular coax cable connector at the K73 Telematics Communication Interface Control Module. It may take up to 2 min for all vehicle systems to power down.
- Using the EL-49903-1 Test Antenna Navn-Cell Comn connect the violet coax cable to the K73 Telematics Communication Interface Control Module. Place the test antenna on the roof of the vehicle, ignition ON.
- Verify the DTC does not set or a call can be completed to the OnStar Call Center while operating the vehicle within the conditions for running the DTC.
- If the DTC sets or a call can not be completed to the OnStar Call Center
Replace the K73 Telematics Communications Interface Control Module.
- If the DTC does not set or a call can be completed to the OnStar Call Center
- If the DTC sets or a call can not be completed to the OnStar Call Center
- Ignition OFF.
- Disconnect the EL-49903-1 Test Antenna Navn-Cell Comn from the K73 Telematics Communication Interface Control Module
- Test the coax cable. 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 T4G Cellular Phone, Navigation, and Digital Radio Antenna.