440 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
EWPS (Engine Warning and Protection System)
Figure 452 Function diagram for the EWPS
Function
The EWPS safeguards the engine from undesirable
operating conditions to prevent engine damage and
to prolong engine life. When a warning condition is
detected, the on-bo a rd ele ctro nic s will illumin ate the
red ENGINE lamp.
When a critical engine condition is detected, the
on-board electronics will shut the engine down if the
protection feature has been enabled. The critical
engine condition will be recorded by a logging feature
that records the event in engine hours and odometer
readings. After the engine has shutdown, the engine
may be restarted for a thirty second run time.
There are four options of EWPS:
• Standard
• 2–way warning
• 3–way warning
• 3–way protection
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
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