Remote Keyless Entry System

The Remote Keyless Entry (RKE) system uses non-switched battery current received through a fused B(+) fuse so that the system remains operational regardless of the ignition switch position. The Body Control Module (BCM) is the primary RKE system controller as well as the Radio Frequency (RF) RKE receiver. The BCM validates the vehicle access code of each RKE transmitter from which it receives RF signal inputs. It ignores requests from any transmitter for which it has no stored vehicle access code. When the BCM receives an input from a valid transmitter source, it uses internal programming to provide the appropriate hard wired outputs to invoke the proper RKE system features and responses.

The RKE system circuits and transmitter inputs are continually monitored by the microcontroller and software contained within the BCM. When the BCM monitors a problem in any of the RKE system circuits or transmitters, it stores a DTC in its memory circuit. The hard wired circuits between components related to the RKE system may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness connectors, splices and grounds.

However, conventional diagnostic methods will not prove conclusive in the diagnosis of the RKE system or the electronic controls and devices that provide features of the RKE system. The most reliable, efficient, and accurate means to diagnose the RKE system or the electronic controls related to RKE system operation, as well as the retrieval or erasure of a DTC requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.