BMW 3 (E46). Manual - part 125
from ASC/DSC switch on dash.
ABS control module signals turn
instrument cluster warning lamps
on during ASC/DSC regulation.
Hydraulic unit/control module
The hydraulic unit is mounted in
conjunction with the control module.
While the hydraulic unit and control
module function as one unit, they are
replaceable individually. All ABS/ASC or
ABS/DSC processing functions are
performed by the control module. The
control module is linked to the vehicle's
engine control module (ECM) and
transmission control module (AGS) (if
applicable) by the CAN-bus network.
Wheel speed sensors
Wheel speed sensors are a crucial
component in every ABS system. Control
modules use these sensor inputs to
determine overall vehicle speed and
individual wheel speed for both ABS
braking and stability control functions.
Three different types of wheel speed
sensor are used in the E46 electronic
braking and stability control systems:
1999 - 2000 Teves MK 20 ASC /
DSC: Inductive