17
Operation
Features
Hill Start Aid
•
Hill Start Aid (HSA) requests the vehicle foundation brake system to
temporarily hold (3 seconds) the vehicle in place when stopped on a
grade of 3% or greater to allow the driver to transition from the vehicle
service brake pedal to the vehicle accelerator pedal to achieve a con-
trolled launch.
•
When HSA is configured on, or Enabled, in the Transmission Control
Module (TCM) and the vehicle is stopped on a grade of 3% or greater
the transmission system requests the vehicle electronic brake system
keep the vehicle foundation brakes applied for 3 seconds after the
driver releases the vehicle service brake.
•
The feature may be disabled for one launch by selecting the vehicle's
HSA switch. When the HSA switch is selected, the lamp on the switch
flashes indicating the feature is disabled. The feature automatically
enables after a successful launch. Refer to OEM for information on
operation of the HSA switch.
Note:
The default configuration for this feature in the TCM is Enabled and
can be configured to activate on a 1%, 2% or 3% grade using Ser-
viceRanger.
NOTICE:
If the vehicle electronic brake system is faulted and not working,
this feature will not function. Refer to OEM for more information on the
vehicle electronic brake system.
