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Vehicle Dynamics and Driver Assist Systems
May 2017
Vehicle Dynamics Control Module & Hydraulic Unit (VDCCM & H/U)
The Vehicle Dynamics Control Module & Hydraulic Unit (VDCCM & H/U) assesses the
vehicles condition based on input signals from various sensors throughout the vehicle. As the
vehicle’s condition is assessed, the VDCCM commands the operation of an internal pump and
series of electronic solenoid valves to regulate brake fluid pressure to each of the 4 wheels.
The Hydraulic Unit (H/U) portion of the VDCCM controls the braking force of each wheel by
increasing, decreasing, or holding brake fluid pressure.
VDCCM & H/U
The VDCCM communicates via the CAN with the Engine Control Module (ECM) and
Transmission Control Module (TCM) generating requests to improve vehicle assistance
characteristics.
10
9
R137
2
*
2
*
R25
2
7
1
*
1
*
B310
12
13
B450
A2
A1
A:
B40
3
*
14
6
44
43
i80A:
A2
A3
A23
A24
AB6A:
A24
A25
A: B134
i74
3
2
K:
i171
K2
K22
ECM
VDC CM TCM
BODY
INTEGRATED UNIT
STEERING
ANGLE SENSOR
AIRBAG CM
A/C CM
DATA LINK
CONNECTOR
POWER
STEERING
CM
RADAR
SENSOR (LH)
STEREO CAMERA
VDCCM CAN Communication
3-40
3-41
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