A method for deploying torque commands from a vehicle stability assist
control system to a four wheel drive system in a vehicle that includes
utilizing a firewall within a four wheel drive system electronic control
unit to analyze commands sent from a vehicle stability assist electronic
control unit to the four wheel drive electronic control unit.
Additionally, the commands from the vehicle stability assist electronic
control unit, when the vehicle control system is in operation, are
integrated with commands independently generated by the four wheel drive
electronic control unit, and resultant wheel torque commands are
generated to be provided to each individual wheel in the four wheel drive
system.