Component Testing
WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
The vehicle may be equipped with sectioned coax cable. Test each section and replace only the faulty section, not the entire length of coax.
- Ignition OFF, disconnect the coax harness connectors at the VCIM and the cellular antenna.
- Test for less than 5 ohms of resistance between the two ends of the coax cable center conductor.
- If greater than the specified range, replace the cellular antenna coax cable.
- Test for less than 5 ohms of resistance between the two ends of the coax cable outer shield.
- If greater than the specified range, replace the cellular antenna coax cable.
- Test for infinite resistance between the coax center conductor and the outer shield.
- If less than the specified range, replace the cellular antenna coax cable.
- Connect the coax harness connector at the VCIM.
- Ignition ON, test for 4.0- 5.5 volts between the coax center conductor and the outer shield.
- If not within the specified range, replace the VCIM.
- If all circuits test normal, replace the cellular antenna.