RVS Circuit Description

WARNING: This page is about a different car, the 2008 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 IPM which determines if a crank request message will be sent to the ECM to activate RVS. To determine if conditions are correct for an RVS event, the IPM will request information from the RIM. The IPM looks at the following inputs:

Vehicle is not in valet mode
All vehicle doors are closed
No keyless entry transmitters are inside the vehicle
Rear compartment lid is not ajar
A valid hood ajar switch closed signal
The doors are locked
The hazard switch is OFF
Battery reconnect has not occurred
Vehicle power mode is correct.

When the IPM determines all conditions meet those required for an RVS event, a message is sent via serial data to the IPM. The ECM relies on the RVS message from IPM, 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.
Vehicle Theft Deterrent (VTD) tamper.