Navistar International DT 466 Diagnostic/Troubleshooting Manual page 67

Traction Control
Traction control is a system that identifies when a
wheel is going faster than the other wheels during
acceleration.
When a traction control condition occurs, a datalink
message is sent to the ECM to limit fuel for the
purpose of reducing engine torque.
Vehicles must have a transmission and an Antilock
Braking System (ABS) that supports traction control.
Diamond Logic® Engine Brake
International® now offers an optional engine brake.
See "Diamond Logic® Engine Brake" in Section 1
(page 53) for feature description.
Diamond Logic® Exhaust Brake
International® now offers an optional integrated
exhaust brake. This feature uses VGT to assist in
braking.
Engine Warning Protection System (EWPS)
Figure 51 Engine Warning Protection System
(EWPS)
The EWPS safeguards the engine from undesirable
operating conditions to prevent engine damage and
to prolong engine life. The ECM will illuminate the red
ENGINE lamp and sound the warning buzzer when
the ECM detects:
• High coolant temperature.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
2 ENGINE AND VEHICLE FEATURES
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
• Low oil pressure.
• Low coolant level (3–way system only).
When the protection feature is enabled and a critical
engine condition occurs, the on-board electronics
will shut the engine down. An event logging feature
will record the event in engine hours and odometer
readings. After the engine has shutdown, and the
critical condition remains, the engine can be started
for a 30 second run time.
Figure 52 EWPS flowchart
Coolant Temperature Compensation and EWPS
Coolant temperature compensation reduces fuel
delivery when the engine coolant temperature is
above cooling system specifications.
The reduction in fuel delivery begins when engine
coolant temperature reaches approximately 107 °C
(225 °F). A reduction of 15% will be achieved as the
temperature reaches approximately 110 °C (230 °F).
When the engine coolant temperature is above 110
°C (230 °F), the red ENGINE lamp is illuminated and
an audible alarm sounds. After the alarm sounds, the
engine will shutdown.
• When the coolant temperature is above 109 °C
(228 °F), the red ENGINE lamp will be illuminated
and DTC 321 will be set.
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