Daimler Freightliner Cascadia 2021, Driver Manual

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vehicle is traveling too fast. Applying the service
brake to slow the vehicle will not cancel cruise con-
trol. Once the service brake is released, the vehicle
speed becomes the new Descent Control set speed.
A pop-up will appear on the instrument cluster screen
to notify the driver of the new speed. See
Fig. 17.7.
When the vehicle’s descent is complete, return the
engine brake stalk to the OFF/Auto position. At this
point the Descent Control set speed will become the
new cruise speed.
Hill Descent Upshift Feature
NOTE: It is critical that the driver maintains
complete control over the vehicle at all times.
The proper speed, and gear if in manual mode,
should be selected before the crest of any hill to
ensure a safe descent. The driver should apply
engine and service brakes appropriately during
any descent.
The Detroit
™
Automated Transmission (DT12) is ca-
pable of upshifting automatically when descending
grades. When the vehicle is descending without en-
gine or service brake application, the DT12 will up-
shift at 2000 rpm. If the engine or service brake is
applied during descent, the DT12 will upshift at 2400
rpm.
Transmission Low Air Warning
CAUTION
If the yellow "Caution: Transmission Air Supply
Low" popup appears while the vehicle is in op-
eration, slow down, safely pull the vehicle off the
road, then correct the problem.
Pneumatic controls are used to shift the transmis-
sion. If there is inadequate air pressure, a yellow
caution pop-up will appear and the quality of gear
shifts may be degraded. See
Fig. 17.8. Wait for air
pressure to build before operating the vehicle.
CAUTION
If the red "Warning: Transmission Will Not Shift"
popup appears while the vehicle is in operation,
choose the safest location available to pull the
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1
1. Icon Showing Descent Control Mode Engaged
Fig. 17.6, Descent Control Mode Active
f611818 05/07/2020
Fig. 17.7, New Descent Control Mode Set Speed
Pop-Up
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Fig. 17.8, Low Transmission Air Pressure Pop-up
Automated and Automatic Transmissions
17.6