Keyless Entry Transmitters

The keyless entry transmitters are not only used to passively or actively lock and unlock the vehicle, they are also used to allow vehicle starting. If the remote control door lock receiver (RCDLR) does not receive a valid RF response after the transmitter is challenged, the RCDLR will not send a fuel enable message to the engine control module (ECM). If the RCDLR is unable to establish communication with the transmitter during an attempted engine start, the NO FOB DETECTED message will display on the driver information center (DIC).

When any one of the 4 allowable programmed key fobs are challenged by pressing the start button, they will passively send a RF signal to the RCDLR. The RCDLR will then send a serial data message to the engine control module (ECM) to enable engine starting.