Hill Start Aid Override Switch
Some vehicles are equipped with a hill start aid
(HSA) feature to prevent the vehicle from rolling
while on steep grades and to allow for a controlled
launch. HSA delays the release of the service brakes
until enough torque is available to begin moving the
vehicle forward, for a maximum of 3 seconds. HSA is
"on" by default. It can be turned off by pressing and
releasing the HSA override switch on the dash. See
Fig. 4.17.
Power Take-Off (PTO) Switch
To activate the PTO function, press the upper half of
the switch. Press the lower half of the switch to
deactivate the PTO function. See
Fig. 4.18.
PTO can also be activated using the digital switch in
the ICU.
WARNING
To avoid injury, do not install a PTO that is not
Detroit Diesel approved onto a Detroit
™
Transmission. Use of a non-Detroit Diesel
approved PTO with a Detroit Transmission could
result in unintended operation which could lead
to severe personal injury.
Transmission Controls
Detroit
™
Automated Transmissions
NOTE: See Chapter 14 Automated and
Automatic Transmissions for automated
transmission operating instructions.
Vehicles with automated and automatic transmissions
use the multifunction control shown in Fig. 4.19. This
control moves in two directions and has two
switches. It is used to request manual shifts, change
shift mode, set engine brake levels, and control
specialty engine brake functions.
Manual Transmissions
NOTE: See Chapter 15 Manual Transmissions
and Clutch, for manual transmission operating
instructions.
If so equipped, the transmission range control and
splitter valves are attached to the gear shift knob.
The range-preselection lever allows the selection of
the low or high range for each transmission ratio. It is
used once during an upshift sequence and once
during a downshift sequence.
Dependent on the transmission model, some ratios
can be split using the splitter-control button.
AWD Controls
Front Axle Transfer Case Switch
CAUTION
Stop the vehicle, set the parking brake, and put
the transmission in neutral before engaging the
front axle. Failure to do so may cause damage to
the transfer case and the driveline.
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ENG
FAN
Fig. 4.16, Engine Fan Switch
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HSA
OFF
Fig. 4.17, Hill Start Aid Override Switch
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PTO
Fig. 4.18, PTO Switch
Driver Controls
4.9
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