Circuit/System Testing
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Vehicle may be equipped with sectioned coax. Test each section and replace only the faulty section, not the entire length or coax.
- Ignition OFF, disconnect the navigation antenna coax from the VCIM module and the navigation antenna.
- Ignition ON, test for less than 1 volt between the antenna coax center terminal and ground.
- If greater than the specified range, replace the antenna coax.
- Test for infinite resistance between the antenna coax center terminal and ground.
- If less than the specified value, replace the antenna coax
- Test for less than 5 ohms of resistance at the antenna coax connector outer shield from end to end.
- If greater than specified value, replace the antenna coax cable.
- Test for less than 5 ohms of resistance at the antenna coax center conductor from end to end.
- If greater than specified value, replace the antenna coax cable.
- Test for infinite resistance between the antenna coax center terminal and the outer shield.
- If coax cable tests normal, test or replace the navigation antenna.