Circuit Description

Remote Control Door Lock Receiver (RCDLR) communicates with Body Control Module (BCM) through Remote Keyless Entry (RKE) serial data circuit. When any button on RKE transmitter is pressed, transmitter sends a signal to RCDLR. RCDLR sends a lock, unlock, rear release, or panic alarm request to BCM, depending on which button is pressed on transmitter. BCM receives message and performs appropriate function. BCM also uses RKE serial data circuit in order to communicate with RCDLR when programming RKE transmitters.

DTC B1003 is set when BCM does not receive an acknowledgment message from RCDLR within 300 milliseconds of a second programming mode/diagnostic mode request. When DTC B1003 is set, RKE system will not operate. DTC B1003 will clear and become a history DTC when fault is no longer present and ignition switch is cycled. History DTC B1003 will clear after 100 consecutive ignition cycles without a fault present. A scan tool may be used to clear history and current DTC(s).