RVS Circuit Description

WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

The RCDLR receives a signal from the keyless entry transmitter indicating a RVS request. A message is then sent to the BCM which determines if a crank request message will be sent to the ECM to activate RVS. The BCM looks at the following inputs to verify the system is ready for an RVS event:

Vehicle is not in valet mode
All vehicle doors are closed
Rear compartment lid is not ajar
The hood is closed
The doors are locked
The hazard switch is OFF
Battery reconnect has not occurred
Vehicle power mode is correct.

When the BCM determines all conditions meet those required for an RVS event, a message is sent via serial data to the BCM. 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 ground the control circuit of the crank relay and start the engine. While the ECM is in RVS mode it will cut fuel to the engine if any of the following additional conditions occur:

Vehicle speed is greater than 0.
Transmission is not in P.
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.
Immobilizer system indicates a theft attempt