Circuit/System 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.
- Ignition OFF, disconnect the harness connector at the console passive antenna.
- Place the key fob near the headliner antenna and attempt to start the vehicle. The vehicle should start.
- If the vehicle does not start, refer to Headliner Antenna Circuit Malfunction below below.
- Refer to Console Passive Antenna Circuit Malfunction below.
Headliner Antenna Circuit Malfunction
- Ignition OFF, disconnect the harness connector at the headliner antenna.
- Install a DMM between the signal circuit terminal A and the low reference circuit terminal B. Set the DMM to capture AC voltage using the MIN MAX function.
- Attempt to start the vehicle. Verify the DMM captured an AC voltage signal.
- If an AC voltage was not captured, test the signal circuit and the low reference circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the RCDLR.
- If all circuits test normal, test or replace the headliner antenna.
Console Passive Antenna Circuit Malfunction
- Install a DMM between the signal circuit terminal A and the low reference circuit terminal B. Set the DMM to capture AC voltage using the MIN MAX function.
- Attempt to start the vehicle. Verify the DMM captured an AC voltage signal.
- If an AC voltage was not captured, test the signal circuit and the low reference circuit for a short to ground or an open/high resistance. If the circuits test normal, replace the RCDLR.
- If all circuits test normal, test or replace the console passive antenna.