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7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
EWPS Operational Diagnostics
The EWPS includes the following features:
EWPS mode – This parameter indicates to the
on-board electronics the desired mode of operation
for the engine warning and protection feature.
Standard warning (rpm, ECT) – Engine overspeed
and overheat are provided as the default operating
mode. No engine shutdown is available.
2–way warning (rpm,
overspeed, overheat, and low oil pressure are
monitored in the engine warning operating mode. No
engine shutdown is available.
3–way warning (rpm, ECT, EOP, ECL) – Engine
overspeed, overheat, low oil pressure, and low
coolant level are monitored in the engine warning
operating mode. No engine shutdown is available.
3-way Protection (rpm, ECT, EOP, ECL) – Engine
overspeed, overheat, low oil pressure, and low
coolant level are monitored in the engine protection
operating mode. Engine shutdown is available when
a critical engine condition is detected. Critical engine
conditions include overheat, low oil pressure and low
coolant level.
ECT Warning Temperature – This parameter
indicates when an engine overheat condition warrants
the red ENGINE lamp to be illuminated and the
warning buzzer to be activated.
ECT Critical Temperature – This parameter indicates
when an engine overheat condition warrants an
engine shutdown. The event logging feature will log
when this event has occurred in both engine hours
and odometer readings.
EOP RPM Boundary 1 – This parameter indicates the
rpm range that engine oil pressure level 1 is used for
the loss of engine oil pressure detection.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
ECT, EOP) – Engine
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
EOP RPM Boundary 2 – This parameter indicates the
rpm range that engine oil pressure level 2 is used for
the loss of engine oil pressure detection.
EOP RPM Boundary 3 – This parameter indicates the
rpm range that engine oil pressure level 3 is used for
the loss of engine oil pressure detection.
EOP Warning Level 1 – This parameter indicates
when a loss of engine oil pressure warrants the red
ENGINE lamp to be illuminated and the warning
buzzer to be activated.
EOP Warning Level 2 – This parameter indicates
when a loss of engine oil pressure condition warrants
the red ENGINE lamp to be illuminated and the
warning buzzer to be activated.
EOP Warning Level 3 – This parameter indicates
when a loss of engine oil pressure condition warrants
the red ENGINE lamp to be illuminated and the
warning buzzer to be activated.
EOP Critical Level 1 – This parameter indicates when
a loss of engine oil pressure condition warrants an
engine shutdown. The event logging feature will log
when this event has occurred in both engine hours and
odometer readings.
EOP Critical Level 2 – This parameter indicates when
a loss of engine oil pressure condition warrants an
engine shutdown. The event logging feature will log
when this event has occurred in both engine hours and
odometer readings.
EOP Critical Level 3 – This parameter indicates when
a loss of engine oil pressure condition warrants an
engine shutdown. The event logging feature will log
when this event has occurred in both engine hours and
odometer readings.
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