Circuit/System Testing
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The global positioning system (GPS) requires a clear line of sight to the sky to operate properly. In most cases the GPS will not have reception near tall buildings or inside structures.
- Ignition OFF, disconnect the GPS antenna coax cable at the A11 Radio.
- Connect the EL-49903-1 OnStar test antenna to the A11 Radio. Place the test antenna on the roof of the vehicle, ignition ON.
- Verify DTC B2462 is not set or that the NO GPS symbol/message is not displayed on the navigation radio.
- If DTC B2462 is set or the NO GPS symbol/message is displayed
Replace the A11 Radio.
- Go to next step: If DTC B2462 is not set or the NO GPS symbol/message is not displayed.
- If DTC B2462 is set or the NO GPS symbol/message is displayed
- Ignition OFF, disconnect the EL-49903-1 OnStar test antenna from the A11 Radio
- Disconnect the GPS coax cable at the T4P Electronic Navigation Antenna.
- Test the coax cable between the A11 Radio and the T4P Electronic Navigation Antenna. 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
- If the coax cable does not pass the test
- Test or replace the T4P Electronic Navigation Antenna.