Headliner and Console Antennas

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.

The keyless entry headliner and console antennas are used for both keyless entry and vehicle starting functions. In their keyless entry function, they are used to locate any keyless entry transmitters within the vehicle. In the antennas vehicle starting function, the antennas transmit and receive the needed communications with the keyless entry transmitter to enable vehicle starting.

The keyless entry headliner antenna is located under the vehicles headliner. The console antenna is located in the vehicle center console. The use of two antennas and the placement of the antennas is to ensure complete coverage of the vehicle interior. These antennas share a driver and are controlled simultaneously by the RCDLR. When the start button is pressed, both antennas send out an identical challenge to the keyless entry transmitter.