Navistar WorkStar Series, Operator'S Manual

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Operation
Some Optional Features:
• Engine Warning System - this system illuminates the Red
“Engine” indicator and actuates a beeper when warning
thresholds for coolant temperature, engine coolant level,
and/or low engine oil pressure are exceeded.
• Engine Shutdown System - this system shuts down
the engine after 30 seconds of operation beyond critical
threshold values for coolant temperature and/or oil pressure.
• Throttle Control for PTO Operation.
• Road Speed Limiting/Governor - programmable maximum
speed.
• Idle Shutdown Timer - shuts down engine after 5 minutes of
idle time.
Certified Clean Idle
MaxxForce® 11 and 13 engines have been designed to meet
the new California Air Resources Board (CARB) idle reduction
standards by generating less than 30-g/hr. NOx emissions when
idling. These engines can be identified by the Certified Clean
Idle decal located on the left side of the hood or driver door.
Self Diagnostics
All MaxxForce® Engine operating parameter Warning Indicators
are located on the instrument panel gauge cluster. When the
ignition switch is turned ON, the Engine Warning Indicators are
illuminated and remain on while the ECM runs normal start-up
tests, then goes OFF. If warning indicator stays on or comes on
while operating the vehicle, it is an indication that the vehicle
needs service.
When the warning indicator is illuminated, a
Diagnostic Trouble Code (DTC) will be generated. Take the
vehicle to a service center as soon as possible as some optional
features and or engine power may be lost while the indicator is
lit.
Engine Warning/Protection System (EWPS)
The engine provides three distinct levels of protection:
• Standard Engine Warning System 2-Way
• Optional Engine Warning System 3-Way (08WWJ)
• Optional Engine Protection System 3-Way (08WPP)
Standard Engine Warning System 2-Way
The ECM monitors engine operating conditions for excessive
engine speed, low oil pressure, and coolant temperature. If
these conditions occur, a fault code will be set, but the Yellow
Engine Warning indicator or the Red Engine Warning Indicator
are not turned ON. Standard instrumentation includes an oil
pressure and engine coolant temperature gauge.
CAUTION
Allowing water to stay in the fuel system
could result in extensive damage to the fuel
injection system. Refer to the appropriate Engine
Operation and Maintenance Manual for more
information.
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