RAM 2500 2023, Руководство пользователя

Страница: 137 / 468

STARTING AND OPERATING 135
NOTE:
For instrument cluster display messages related to the
vehicle's exhaust system
Ú
page 104.
Idle-Up Feature
The driver-controlled high idle speed feature will help
increase cylinder temperatures and provide additional cab
heat, however, excessive idling may still cause the
exhaust aftertreatment system to not properly regenerate.
Extended periods of idle time should be avoided.
The Idle-Up feature uses the Cruise Control buttons to
increase engine idle speed and quickly warm the vehicle's
interior.
1. With the transmission in PARK, the parking brake
applied, and the engine running, push the On/Off
button to the ON position, then push the SET (-)
button.
2. The engine RPM will go up to 1,100 RPM. To increase
the RPM, push and hold the RES (+) button and the
idle speed will increase to approximately 1,500 RPM.
To decrease the RPM, push and hold the SET (-)
button and the idle speed will decrease to approxi -
mately 1,100 RPM.
3. To cancel the Idle–Up feature, either push the
CANCEL button, push the On/Off button, or press the
brake pedal.
N
OISE
Diesel engines can create noises that may seem
concerning. 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 normal
and will change from day to day, as the engine breaks in,
and can vary with changes in ambient temperature.
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. Diesel equipped vehicles also have an
exhaust after-treatment system to reduce emissions
utilizing a Diesel Particulate Filter (DPF) 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 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.
S
TOPPING
T
HE
E
NGINE
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 especially
important for turbocharged, charge air-cooled engines.
Refer to the following chart for proper engine shutdown:
Driving Condition Load Turbocharger Temperature Idle Time (min.) Before Engine Shutdown
Stop and Go Empty Cool Less than One
Stop and Go Medium - One
Highway Speeds Medium Warm Two
City Traffic Maximum GCWR - Three
Highway Speeds Maximum GCWR - Four
Uphill Grade Maximum GCWR Hot Five
4
23_DJD2_OM_EN_USC_t.book Page 135