operators_manual

switch a second time while the test is
running. The operator can verify the light
functionality by visibly watching the light
from outside the vehicle during the test or
can read the instrument cluster for any
faults displayed that are lighting related.
How to use the Exterior
Light Self Test Switch
To start the Exterior Light Self-Test (ELST)
feature:
1. Park the vehicle and set the
parking brakes.
2. Insert the key into the ignition, start
the engine and allow the vehicle to
run through its own Power On Self
Test.
3. Press the momentary switch on the
dash to start the ELST.
Heating and Air
Conditioning
This vehicle's heating and air conditioning
system operates in four distinct modes:
manual, automatic, semi-automatic, and
maximum defrost. Each mode provides the
driver with the greatest level of comfort and
convenience while maintaining the
flexibility of traditional systems.
The recommended mode for all conditions
that do not require windshield defrosting is
the automatic mode. This mode is capable
of maintaining cab comfort under various
driving conditions without driver interaction.
The cab heater and air conditioner controls
are located together in the center of the
dash just to the right of the steering
column. The sleeper heater and air
conditioner controls are located in the
sleeper cabinet.
WARNING
Do not drive with visibility reduced by
fog, condensation, or frost on the
windshield. Your view may be ob-
scured, which may result in death, per-
sonal injury, equipment or property
damage. For clear visibility and safe
driving it is extremely important for you
to follow the instructions pertaining to
the function and use of the ventilation/
heating and defogging/defrosting sys-
tem. If in doubt, consult your dealer.
Maximum heating output and fast de-
frosting can be obtained only after the
engine has reached operating temper-
ature.
WARNING
Exhaust fumes from the engine con-
tain carbon monoxide, a colorless and
odorless gas. Do not breathe the en-
gine exhaust gas. A poorly maintained,
damaged or corroded exhaust system
can allow carbon monoxide to enter
the cab. Entry of carbon monoxide into
the cab is also possible from other ve-
hicles nearby. Failure to properly main-
tain your vehicle could cause carbon
monoxide to enter the cab, resulting in
death or personal injury.
CONTROLS - How to use the Exterior Light Self Test Switch
112 Y53-6047-2HEN (03/18)
3