Engine Starting (Parking Brake Applied)
VoltmeterCheck the gauge (diesel engine) or indicator light
(gasoline engine) to verify the alternator is
charging.
Steering Linkage
Free PlayInspect for excessive free play in the steering
linkages. The steering wheel should have less
than 2 in. (5 cm) of free play at its rim.
Full Power
Hydraulic Brake
InspectionPump the brake pedal several times with the
ignition in the off or run position. The
motor/pumps can be heard momentarily
replenishing the accumulators.
Parking BrakeVerify the parking brake holds the vehicle by
gently trying to pull forward with the parking
brake applied.
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WARNING:Driving a vehicle with the brake system warning
light on is dangerous. A significant decrease in braking
performance may occur. It takes you longer to stop the vehicle. Have
the vehicle checked by your authorized dealer. Driving extended
distances with the parking brake engaged can cause brake failure and
the risk of personal injury.
Charging System
It illuminates when the 12–volt battery is not charging properly.
Contact your authorized dealer as soon as possible. This
indicates a problem with the electrical system or a related
component.
Check Fuel Cap (gasoline engine only)
It illuminates when the fuel cap may not be properly installed.
Continued driving with this light on may cause the service
engine soon warning indicator to come on.
Check Suspension
It illuminates when the air suspension dump switch has been
activated.
Check Transmission (Allison automatic transmission only)
It illuminates while driving if a problem has been detected in
the transmission; shifting may be restricted. Depending on the
severity of the problem, the shifter’s digital read-out may turn
blank.
On MD 3000 series transmissions,operation may continue in order to
reach service assistance. The control unit may not respond to shift
selector requests, since operating limitations are being placed on the
transmission (i.e. upshifts and downshifts may be restricted). Direction
changes do not occur.
Cruise Control
It illuminates when you switch this feature on.
CK
SUSP
Instrument Cluster69
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•TRIP A/B: Registers the distance of individual journeys. Press and
release the INFO button until the A or B trip appears in the display
(this represents the trip mode). Press the RESET button to reset.
SeeSystem check and vehicle feature customizationlater in this
section to switch the display from metric to English.
•MILES (KILOMETERS) TO E: This displays an estimate of
approximately how far you can drive with the fuel remaining in your
tank under normal driving conditions. Remember to turn the ignition
off when refueling to allow this feature to correctly detect the added
fuel. Distance to empty is calculated using a running average fuel
economy, which is based on your recent driving history of 500 miles
(800 kilometers). This value is not the same as the average fuel
economy display. The running average fuel economy is re-initialized
to a factory default value if the battery is disconnected.
•AVG MPG (L/100 km): Average fuel economy displays your average
fuel economy in miles/gallon or liters/100 km.
•TIMER: Displays the trip elapsed drive time. Press and release
RESET to pause the timer. Press and hold RESET to reset the timer.
System Check and Vehicle Feature Customization
Press the SETUP button repeatedly
to cycle the message center through
the following features:
SETUP
RESET FOR
SYSTEM CHECKPress the
RESET button.OIL LIFE
CHARGING SYSTEM
BRAKE SYSTEM
MILES TO EMPTY
UNITS Press the
RESET button.English or Metric
LANGUAGE =
ENGLISH /
SPANISH / FRENCHPress the
RESET button.English / Spanish / French
(Press and hold to set.)
INFOSETUP
RESET
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INFORMATION MESSAGES
Note:Depending on the vehicle options equipped with your vehicle, not
all of the messages display or are available. Certain messages may be
abbreviated or shortened depending upon which cluster type you have.
Press the OK button to acknowledge and remove some messages from
the information display. Other messages are removed automatically after
a short time. Certain messages need to be confirmed before you can
access the menus.
Battery and
Charging System
MessagesAction / Description
CHECK CHARGING
SYSTEMDisplayed when the charging system needs
servicing. If the warning stays on or continues
to come on, contact your authorized dealer as
soon as possible.
Brake System
MessagesAction / Description
BRAKE FLUID
LEVEL LOWDisplayed when the brake fluid level is low
and the brake system should be inspected
immediately. SeeBrake fluid checkin the
Maintenancechapter.
CHECK BRAKE
SYSTEMDisplayed when the brake system needs
servicing. If the warning stays on or continues
to come on, contact your authorized dealer as
soon as possible.
PARK BRAKE
ENGAGEDDisplayed when the parking brake is set and
the vehicle is in motion.
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Trailer Air Supply and Parking Brake Modular Controls
(If Equipped)
The trailer air supply valve delivers
air to the trailer supply and
automatically pops out, shutting off
the trailer supply, if pressure
decreases to approximately 35 psi
(249 kPa).
The parking brake controls the
spring brakes on the tractor. When
the knob is pulled out, it causes the
trailer supply valve to pop out,
applying both the tractor and trailer
parking brakes. The trailer brakes
may be independently released by
pushing only the trailer air supply
valve in.
Initial Charge
With the air system completely discharged, both knobs (A and B) are
out. When the air pressure reaches 70 psi (483 kPa), the trailer air
supply (A – red knob) may be pushed in and should stay in, charging the
trailer air system and releasing the trailer brakes.
B
AB
A
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WRECKER TOWING
WARNING:To reduce the risk of personal injury or property
damage when manually releasing the spring brakes, be sure to
block the wheels so the vehicle cannot move once the brakes are
released.
Note:Make sure the vehicle is securely connected to the tow vehicle
and that the tow vehicle’s parking brakes are applied before releasing the
disabled vehicle’s spring brakes.
Before moving the disabled vehicle, check for adequate road clearance of
vehicle components. It is recommended the disabled vehicle be unloaded
prior to being towed to reduce any abnormal load to the vehicle
components resulting from the towing procedures. Before towing, make
sure the parking brake is fully released. The spring-actuated type parking
brake can be reset by recharging the air system with at least 64 psi
(441 kPa) of air. If the brake system does not retain air pressure, then
the spring brakes must be released manually. SeeParking brakein the
Brakeschapter.
Towing the Vehicle with the Front Wheels Suspended
Note:To avoid transmission damage, vehicles should not be towed even
a short distance without suspending rear wheels or removing the axle
shafts or driveshaft.
Note:In the event the chassis is equipped with a tandem axle and the
vehicle is to be towed from the front, the forward rear axle may be
raised to clear the road surface and secured to the frame by chains or
U-bolts, allowing only the rear rear axle to contact the road surface. Axle
shafts must be removed from the rear rear axle assembly. The wheel hub
ends must be covered to prevent loss of axle lubricant and entrance of
contaminants. Use extreme care in securing the chains or U-bolts to
avoid possible damage to the brake lines, hoses or other components.
When it is necessary to tow a vehicle with the front wheels suspended,
extra precautions must be taken to avoid transmission or differential
damage:
•Remove the axle shafts from the axle assembly to prevent the wheels
from driving the differential and the transmission.
•The wheel hub ends must be covered to prevent loss of axle lubricant
and entrance of other contaminants. If the axle shafts are not
removed, removal of the driveshaft is required.
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Fuel System
Note:During extended periods of vehicle storage (30 days or more),
fuel may deteriorate due to oxidation. Add a quality gas stabilizer
product to the vehicle fuel system whenever actual or expected storage
periods exceed 30 days. Follow the instructions on the additive label.
The vehicle should then be operated at idle speed to circulate the
additive throughout the fuel system.
•Fill the fuel tank(s) with high-quality fuel until the first automatic
shutoff of the fuel pump nozzle.
Cooling System
•Protect against freezing temperatures.
•When removing vehicle from storage, check coolant fluid level.
Confirm there are no cooling system leaks, and fluid is at the
recommended level.
Battery
Note:If battery cables are disconnected, it is necessary to reset memory
features.
•Check and recharge as necessary. Keep connections clean.
•If storing your vehicle for more than 30 days without recharging the
battery, it may be advisable to disconnect the battery cables to make
sure battery charge is maintained for quick starting.
Brakes
•Make sure brakes and parking brake are fully released.
Tires
•Maintain recommended air pressure.
Miscellaneous
•Make sure all linkages, cables, levers and pins under the vehicle are
covered with grease to prevent rust.
•Move vehicles at least 25 feet (8 meters) every 15 days to lubricate
working parts and prevent corrosion.
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SYNC is an in-vehicle communications system that works with your
Bluetooth-enabled cellular phone and portable media player. This allows
you to:
•Make and receive calls.
•Access and play music from your portable music player.
•Use 911 Assist, Vehicle Health Report and SYNC Services (Traffic,
Directions & Information) (if equipped).
•Use applications, such as Pandora and Stitcher, via SYNC AppLink™
(if applicable).
•Access phonebook contacts and music via voice commands.
•Stream music from your connected phone.
•Text message.
•Use the advanced voice recognition system.
•USB device charging (if your device supports this).
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