Vehicle network
The hydraulic unit/control module
communicates with some sensors and
many other control modules over the
CAN-bus. The CAN-bus is a system of
wiring that functions like a computer
network, allowing different components
to communicate over the same data line,
at the same time, by varying electronic
signals.
Component communication dialogs take
place between multiple control units and
sensors over the CAN-bus:
Engine control module (ECM)
provides current engine torque to
ABS control module.
ABS control module provides wheel
speed sensor signals (vehicle
speed) to other modules
ABS control module signals ECM to
increase/reduce torque, ECM
adjusts motor driven throttle
(MDK/EDK)
ABS control module commands
transmission control module (AGS)
to suppress shifts during ASC/DSC
regulation
DSC receives yaw, lateral
acceleration & steering angle
sensor information
ABS control module receives signal
Suspension, Steering and Brakes — General
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Summary of Contents for 1999-2005 M3
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