Engine Control Module (ECM)

The ECM communicates with the RCDLR over the serial data line. If the RCDLR receives a valid transmitter RF response, the RCDLR allow the ignition to rotate to the RUN position and will send the fuel enable message to the ECM to enable the starting system. If the RCDLR does not receive a valid response from the transmitter, the ignition control knob will not rotate. Additionally, if the fuel enable password received by the ECM does match the stored password, vehicle starting will be disabled and the RCDLR will illuminate the security indicator.