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Vehicle Dynamics and Driver Assist Systems
May 2017
Diagnostics
Self-Diagnostics
The VDC system has extensive self-diagnostic capabilities. When the ignition switch is turned
from OFF to ON, the VDCCM performs an electrical self-check and illuminates the VDC,
ABS, Hill Holder, and/or other related warning lights on the combination meter. If there are no
electrical problems, the warning lights should turn OFF after approximately 2 seconds.
Note: During this self-test a slight shock in the brake pedal may be felt and audible
noise may be heard from the Motor Pump actuation. This does not indicate an
abnormal condition.
Combination Meter Warning Lamps SSM Warning Lamp PIDS
The VDCCM performs a second check when the vehicle speed reaches approximately 3
-6 MPH (if the brake has not been applied) or approximately 8 MPH (if the brake has been
applied). During this self-check the VDCCM briefly operates the Motor Pump.
System Self-Test
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