Circuit/System Description

The back up keyless entry antenna is located in the glove compartment area and is used as a short range low frequency (LF) transmitter. When a valid key fob is within the passenger compartment and the brake pedal is depressed and the ignition button is pressed the keyless entry antenna transmitter broadcasts a challenge within the passenger compartment to the key fob. If the response from the key fob via radio frequency (RF) is a valid response and all the security requirement are met the vehicles engine will start or be able to go into accessory mode.