here is some of the description and operation:The remote control door lock receiver (RCDLR) receives a signal from the keyless entry transmitter indicating a remote vehicle start (RVS) request. A message is then sent to the body control module (BCM) which determines if a crank request message will be sent to the engine control module (ECM) to allow engine starting. To determine if conditions are correct for an RVS event, the BCM will ensure the following conditions are met:
• The key is not in the ignition.
• The vehicle is not in valet mode (if equipped).
• All vehicle doors are closed.
• The rear compartment lid is not ajar.
• A valid hood ajar switch closed signal is present.
• The doors are locked.
• The hazard switch is OFF.
• The vehicle power mode is correct.
• No content theft deterrent (CTD) alarm triggers are present.
When the BCM determines all conditions meet those required for an RVS event, a message is sent via serial data to the ECM. The ECM relies on the RVS message from BCM to enable RVS when the crank request signal is received. If the ECM does not receive a valid RVS message, it will not attempt to start the engine. While the ECM is in RVS mode it will suspend engine operation if any of the following additional conditions occur:
• Vehicle speed is greater than 0.
• Transmission is not in PARK.
• Excessive engine coolant temperature
• Low oil pressure
• The malfunction indicator lamp (MIL) is commanded ON.
• Engine crank time is greater than 30 seconds.
• Excessive engine speed.
• Accelerator pedal position too high.
• Remote start timer equals 0.
• Vehicle theft deterrent (VTD) indicates tamper.