24
Operation
Features
Hill Start Aid Operation (HSA)
Hill Start Aid defaults to the “On” position. In heavy-duty UltraShift
PLUS
models, it can be turned “Off” by pressing and releasing the Hill Start Aid
switch, however, it will turn back on after the first successful launch. If the
switch is turned off, the lamp in the Hill Start switch will flash. (Medium-duty
UltraShift
PLUS
models do not have a HSA override switch.)
The grade at which Hill Start Aid is active is defaulted to 1% but can be config-
ured to activate on a 2% or 3% grade
A grade sensor is used to determine when to engage Hill Start Aide. The driver
can view the grade reading in the Gear Display by the following process:
•
Ignition is on with engine not running.
•
Shift Device is set to Neutral.
•
Depress the Accelerator Pedal (5) times within 10 seconds.
•
The grade will be displayed in 1% increments with Up or Down
arrows indicating slope direction.
Vehicle Facing Uphill - Forward Mode
•
Vehicle must be on incline greater than 1% and in a forward mode.
•
Bring vehicle to a stop and depress the service brakes then release
the service brakes.
Note:
Vehicle will begin to move after 3 seconds, and the clutch will perform
partial engagements to slow the vehicle motion. Driver must either step
on the brake or apply the throttle.
