Circuit/System Description

WARNING: This page is about a different car, the 2010 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

Remote vehicle start (RVS) begins as a radio frequency (RF) message sent from a keyless entry transmitter to the external RF antenna located in the back glass. This antenna is connected via coax cable to the remote control door lock receiver (RCDLR). The RVS request is sent by the RCDLR to the rear integration module (RIM) via serial data. The RIM monitors system conditions such as content theft deterrent (CTD), hood ajar status, and body DTCs to determine if an RVS event will occur. If conditions are determined to be acceptable, the RVS message is sent to the engine control module (ECM). The ECM monitors system conditions such as engine control parameters and vehicle theft deterrent (VTD) to determine if engine starting will be allowed. If conditions are acceptable, the ECM will initiate engine starting. During the engine run time in a RVS attempt, before the operator enters the vehicle, the ECM may discontinue engine operation if system conditions require it or a message is received from the RIM requesting the engine be turned OFF.