Vehicles equipped with antilock braking systems
(ABS) have the ability to turn the engine brake off if
a wheel-slip condition is detected. The engine brake
will automatically turn itself back on once the wheel
slip is no longer detected. The DDEC VI system will
deactivate the engine brake system when the engine
speed falls below 1000 rpm or when the vehicle
slows down to a preset speed, depending on DDEC
programming. This prevents stalling the engine.
For safety reasons, do not use cruise control when it
is not possible to keep the vehicle at constant speed
due to:
•
Winding roads
•
Heavy traffic
•
Slippery pavement
•
Descending grades calling for engine brake
assistance
For a detailed explanation of the engine brake opera-
tion, see the
Detroit Diesel DD15 Engine Operator’s
Guide
.
Caterpillar C–10, C–12, and 3406E
Electronic Engine Operator Control
IMPORTANT: This vehicle is equipped with an
Instrumentation Control Unit (ICU) that provides
warning messages and diagnostic fault codes.
See "Instrumentation Control Unit", depending
on the type of unit installed in your vehicle.
The Caterpillar C–10, C–12, and 3406E electronic
engines use a computer (electronic control module)
to automatically control engine timing and fuel injec-
tion. The electronic features of these engines include
an electronic governor, fuel-to-air ratio control, pro-
grammable engine ratings, injection timing control,
fault analysis and recording, and a datalink used for
programming the electronic control module and
troubleshooting the system.
All Caterpillar electronic engines have an engine
check light located above the speedometer and ta-
chometer. This warning light comes on or flashes if
the engine oil pressure is low, the coolant tempera-
ture is high, the intake manifold air temperature is
high, the coolant is low (optional), or whenever there
is a problem within the electronic engine system.
Some vehicles equipped with Caterpillar electronic
engines have an automatic engine shutdown option.
This option will shut off fuel to the engine if poten-
tially damaging conditions are detected. See "Engine
Protection—Warning and Shutdown Process" at the
beginning of this chapter, for more information. See
the Caterpillar electronic engine troubleshooting
manual for troubleshooting procedures.
BrakeSaver Control, Optional
The BrakeSaver (optional on Caterpillar 3406E en-
gines) is operated by a lever mounted in the cab.
The lever controls the amount of oil being directed
through the BrakeSaver. The time required to fill the
BrakeSaver with oil pressure to the point of maxi-
mum braking in the BrakeSaver is approximately 1.8
seconds.
Cummins CELECT
™
Plus Electronic
Engines Operator Control
IMPORTANT: This vehicle is equipped with an
Instrumentation Control Unit (ICU) that provides
warning messages and diagnostic fault codes.
See "Instrumentation Control Unit", depending
on the type of unit installed in your vehicle.
Cummins CELECT Plus is an electronic fuel control
system. These electronic engines are controlled by a
microprocessor-based computer. This computer con-
trols specific engine and vehicle speed modes of op-
eration to maximize vehicle fuel economy and perfor-
mance.
Vehicles with these engine systems have three indi-
cator lights: a yellow check engine light, a red stop
engine light, and an engine protection (engine fluids)
light. These indicators are located in the lightbar
above the speedometer and tachometer. With the
ignition switch on, the indicator lights come on for
about two seconds; then, if there is no problem with
the engine system, the lights will go out. Whenever
there is a problem within the electronic engine sys-
tem, one of the lights will come on and stay on as
long as the problem exists. See "Engine Protection—
Warning and Shutdown Process" at the beginning of
this chapter, for more information.
Suspension Seat Adjustment Controls
Due to the maximum adjustability of mid- and high-
back air suspension seats, it is possible to combine
the seat back recline adjustment and the seat slide
adjustment so that the seat back contacts the back-
wall. It is the responsibility of the driver to adjust the
Instruments and Controls Identification
2.24
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