Keyless Entry Receiver: Description and Operation

SYSTEM OPERATION
The Remote Keyless Entry (RKE) receiver is a radio frequency unit that is integral to the power lock and RKE module or to the Central Timer Module (CTM). The RKE receiver has a memory function to retain the vehicle access codes of the RKE transmitters, even if the battery is disconnected. The power lock and RKE module can store two transmitter vehicle access codes, the CTM can store up to four.

The RKE receiver is energized by one of two radio frequency inputs from the RKE transmitter, Unlock or Lock. The programming of the power lock and RKE module or the CTM responds to these RKE inputs, as well as many other inputs, by sending the proper control outputs to the power lock motors, the courtesy lamp circuit, and (with the CTM-based RKE system only) the horn relay.

The RKE receiver is only serviced as a unit with the power lock and RKE module or the CTM and, if faulty or damaged, the module unit must be replaced.