Keyless Entry Receiver: Description and Operation

The Remote Keyless Entry (RKE) receiver is a radio frequency unit that is integral to the high-line or premium version of the Central Timer Module (CTM). The CTM also contains the program logic and control circuitry for the RKE system. The CTM is mounted under the driver side end of the instrument panel, inboard of the instrument panel steering column opening.

The RKE receiver has a memory function to retain the vehicle access codes of at least one, but no more than four RKE transmitters. The receiver is designed to retain the transmitter codes in memory, even if the battery is disconnected.

The RKE receiver is energized by one of three radio frequency inputs from the RKE transmitter; Unlock, Lock, or Panic. The programming of 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, the horn relay, and the headlamp (or security) relay.

For diagnosis or programming of the RKE receiver within the high-line or premium CTM, a DRB III scan tool and the proper Diagnostic Procedures are recommended. The RKE receiver is only serviced as a unit with the high-line or premium CTM and, if faulty or damaged, the CTM unit must be replaced.