Circuit/System Testing
WARNING: This page is about a different car, the 2012 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For steps 5-8, perform the tests on each of the disconnected coax cables.
Rear Glass Antenna Testing
- Inspect the radio antenna module grounding surfaces and the mounting hardware for any corrosion that may cause a poor ground.
- If corrosion is noted, clean the grounding surfaces or hardware.
- Ignition OFF, disconnect the harness connector at the radio antenna module.
- Radio ON, test for B+ between the signal circuit terminal 1 and ground.
- If less than the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the radio.
- Disconnect both coax cables from the radio and the radio antenna module.
- 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 on the antenna coax center terminal from end to end.
- If greater than the specified range, replace the antenna coax.
- Test for less than 5 ohms on the antenna coax outer shield from end to end.
- If greater than the specified range, replace the antenna coax.
- Test for infinite resistance between the coax center terminal and the outer shield.
- If less than the specified value, replace the antenna coax.
- Radio ON, verify the radio reception has improved.
- If there is still poor reception, replace the antenna module.
- If all circuits test normal, replace the radio.