Table of Contents
Advertisement
168
STARTING AND OPERATING
2. The engine RPM will go up to 1,100 RPM. To
increase the RPM, push and hold the ACCEL/
RESUME switch and the idle speed will increase to
approximately 1,500 RPM. To decrease the RPM,
push and hold the DECEL switch and the idle speed
will decrease to approximately 1,100 RPM.
3. To cancel the Idle–Up feature, either push the CAN-
CEL switch, push the ON/OFF switch, or press the
brake pedal.
NOISE
Diesel engines can create noises that may seem con-
cerning. The nature of a diesel engine is compression
ignition where compressed air and fuel are mixed and
ignited. Weather, barometric pressure, altitude, and
temperature will affect how fuel is ignited in the engine.
Engines will sound different from day to day or previous
model years. Clicking, ticking, or light knocking is nor
Driving Condition
Stop and Go
Stop and Go
Highway Speeds
City Traffic
Highway Speeds
Uphill Grade
mal and will change from day to day, as the engine
breaks in, and can vary with changes in ambient tem-
perature. Clicking sound from under the hood shortly
after vehicle shutdown is normal as actuators such as
the EGR valve are cycled. Fuel pump noise may
increase during low speed/light load conditions when
ambient temperature is above 100°F (38°C), and
when fuel tank level is below 10% which is a normal
condition of the fuel system and controls strategy. Die-
sel equipped vehicles also have an exhaust after-
treatment system to reduce emissions utilizing a DPF
(refer to "Odor" in this section for further information)
and a Selective Reduction Catalyst (SCR). The SCR
reduces Nitrogen Oxides (NOx) using the Diesel Exhaust
Fluid (DEF) system. DEF is injected directly into the SCR
Load
Empty
Medium
Medium
Maximum GCWR
Maximum GCWR
Maximum GCWR
through a dosing module. This process will create a
clicking sound and at times, will make noise even with
the vehicle shut off. This is normal as the DEF dosing
module is purging DEF. If at any time the check engine
light is on, please visit an authorized dealer.
STOPPING THE ENGINE
Idle the engine a few minutes before routine shutdown.
After full load operation, idle the engine three to five
minutes before shutting it down. This idle period will
allow the lubricating oil and coolant to carry excess
heat away from the combustion chamber, bearings,
internal components, and turbocharger. This is espe-
cially important for turbocharged, charge air-cooled
engines. Refer to the following chart for proper engine
shutdown:
Turbocharger Temperature
Cool
-
Warm
-
-
Hot
Idle Time (min.) Before Engine Shut-
down
Less than One
One
Two
Three
Four
Five
Advertisement
Table of Contents
