Network Message Chart

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

Broadcast Message	Originating Module	Message Purpose
ABS active	ABS	Used to confirm that the ABS is operational.
Power mode	BCM	Used to confirm the ignition status of the vehicle.
Stability control brake active	ABS	Used to confirm the operational state of the stability control system.
Steering angle counter	SASM	Used to verify the validity of the steering angle message.
Steering angle status	SASM	Used to confirm the steering angle sensor is initialized and operating correctly.
Steering wheel direction of rotation	SASM	Used to confirm the direction in which the EPAS motor is driven.
Traction control brake active	ABS	Used to confirm the operational state of the traction control system.
Transport mode	BCM	Used to confirm the vehicle is in normal operation mode, factory mode, transport mode or a crash event has been identified and the vehicle has been set to a post crash configuration.
Vehicle configuration/information	ABS	Used to compare the PSCM configuration against the vehicles specific configuration (central car configuration).
Vehicle speed	ABS	Used to determine the level of assist supplied.
Wheel speed data	ABS	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.