Network Message Chart

Module Network Input Messages: Power Steering Control Module (PSCM)

Broadcast Message	Originating Module	Message Purpose
ABS active	ABS Module	Used to confirm that the ABS is operational.
Active park assist steering angle request	PAM	This message is first sent to the GWM and then to the PSCM. This message is a request from the PAM to turn the front wheels for the active park assist system.
Calculated steering angle	IPMA	This message contains the steering angle necessary to aid the driver during a lane keeping assist function.
Ignition status	BCM	This message is first sent to the GWM and then to the PSCM. Used to confirm the ignition status of the vehicle.
Lane departure warning status request	IPMA	This message informs the PSCM of the current lane departure system status; idle, not used, warning left, suppress left, warning right, suppress right, suppress right-left.
Lane keeping aid intervention request	IPMA	This message requests the type of lane keeping assistance required to aid the driver; intervention left, suppress left, intervention right, suppress right, in progress, suppress right-left.
Lane keeping alert request	IPMA	This message requests the type of lane keeping alert (in the form of steering wheel vibration) from the PSCM; none, low, medium or high.
Lane keeping system ramp type request	IPMA	This message informs the PSCM of the type of steering input require; smooth or quick.
Power pack status	PCM	This message is first sent to the GWM and then to the PSCM. Used to inform the PSCM of the current engine operating status; off - torque not available, on - torque not available, on - torque available or start in progress - torque not available.
Road curvature	IPMA	Used to inform the PSCM the vehicle is driving through a curve in the road. The PSCM ignores any lane keeping requests if the vehicle is driving through a curve.
Stability-traction control event in progress	ABS Module	Used to confirm the operational state of the stability control system.
Steering angle	ABS Module	The ABS calculates the steering wheel angle based off information from wheel speed signals and stability control information from the RCM.
Vehicle lateral acceleration	ABS Module	Used for operation of the lane departure warning and lane keep assist systems.
Vehicle speed	PCM	This message is first sent to the GWM and then to the PSCM. Used to determine the level of assist supplied.
Wheel speed data	ABS Module	Used to validate the steering wheel component angle by comparing the rotational speeds of each wheel. The difference in the speed of each wheel is used to derive a steering angle for comparison against the absolute steering angle message from the SASM.