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Vehicle Dynamics and Driver Assist Systems
May 2017
Basic Operation
Parking Brake Application
There are three methods of applying the Parking Brake:
1. Ignition switch OFF - Briefly depressing the Parking Brake Switch inward will apply
the parking brake. The parking brake cannot be released with the ignition switch off
(electrically).
2. Ignition switch ON and/or engine operating – Briefly depressing the Parking Brake
Switch inward will apply the parking brake.
3. Emergency braking - The Electronic Parking Brake can serve as an emergency brake
by continually depressing on the Parking Brake Switch. If the Parking Brake Switch is
continually depressed while the vehicle is moving, the EPB applies partial parking brake
pressure to prevent the rear wheels from locking. When the vehicle speed reaches zero
vehicle, the parking brake will fully apply.
EPB and Hill Holder Switches
Parking Brake Release
There are two methods releasing the Parking Brake:
1. Manual Release - The EPB is manually released by briefly pulling the EPB switch
outward when the ignition is in the ON position (or engine running) and the brake pedal
is depressed.
2. Automatic release - The EPB will automatically release upon vehicle acceleration
provided the doors of the vehicle are closed and the driver seat belt is connected. (MT
vehicles must accelerate and release the clutch to utilize automatic release.)
On Manual transmission vehicles, the EPB is set to recognize the clutch engagement point so
a smooth release of the brake pedal and clutch application is achieved. Automatic transmission
vehicles utilize the accelerator angle as the necessary input to release the Hill Holder. Steeper
inclines require higher percentages of the accelerator input. (Higher throttle opening angles
allow a higher engine torque to develop ensuring a smooth acceleration of the vehicle during
Hill Holder release).
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