Circuit/System Testing (without Navigation Radio)
WARNING: This page is about a different car, the 2012 Buick Verano. 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 minutes after turning the ignition ON for the GPS satellites to acquire vehicle signal.
- Ignition OFF and all vehicle systems OFF, disconnect the GPS and cellular coax cable connector at the K73 telematics communications interface control module. It may take up to 2 minutes for all vehicle systems to power down.
- Using the EL-49903-3 kit (EL-49903-5 adapter and EL-49903-4 coax cable), connect the EL-49903 GM OnStar antenna diagnostic tool kit to the K73 telematics communications interface control module. Place the test antenna on the roof of the vehicle, ignition ON.
- Verify the DTC does not set while operating the vehicle within the conditions for running the DTC.
- If the DTC sets
Replace the K73 telematics communications interface control module.
- If the DTC does not set
- If the DTC sets
- Ignition OFF.
- Disconnect the EL-49903 GM OnStar antenna diagnostic tool kit from the K73 telematics communications interface control module
- Test the coax cable. Refer to Component Testing below.
- 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.