BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual 22
BENDIX GSBC SYSTEM FEATURES CONT.
AUTOHOLD™ OPTIONAL
The Auto-Hold™ feature may automatically apply and hold the service brakes when
the vehicle is stationary. Under certain circumstances, the feature will continue to
hold the service brakes in the applied position until the driver takes action. If the
driver does not take action, depending on the vehicle load and the grade, the system
may also use the spring brakes to assist in holding the vehicle.
Auto-Hold is not intended to hold the vehicle stationary when the vehicle is
unattended. It is not a parking brake and should not be relied upon to hold a
vehicle on a steep grade.
Auto-Hold may potentionally help the driver prevent the vehicle from rolling downhill
when moving up a steep incline from a stationary position. NOTE: Auto-Hold has
replaced Hill Start Aid/Assist (HSA) in this Bendix® GSBC® brake control system as
opposed to previous versions.
While the Auto-Hold feature is active, if the driver presses the accelerator pedal, the
system may release the service brakes (and spring brakes if applicable) once the
driveline is engaged, with the goal of preventing the vehicle from rolling backwards.
The Auto-Hold feature is automatic and may become enabled whenever the vehicle
is stationary. If the driver wants to disable Auto-Hold, there is a physical switch on the
dashboard that disables the feature provided that Auto-Hold is not currently active.
NOTE: It may be important to disable the Auto-Hold feature during service or a
roadside inspection, for example to check foundation brake stroke (refer to the
CVSA [Commerical Vehicle Safety Alliance] 2023-03 – Hill Start Aid/Brake Hold Modes on
Power Units bulletin).
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