370 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
ECL Sensor (Engine Coolant Level)
Figure 418 Function diagram for the ECL sy
stem
The ECM monitors engine coolant level
and alerts
the operator when coolant is low. T
he ECM can be
programmedtoshuttheengineoff
when coolant is
low.
The ECL system includes the Elect
ronic Control
Module (ECM) and the engine cool
ant tank with a
coolant level sensor. The ECL s
witchisusedinthe
plastic deaeration tank.
Coolant level monitoring is a custome
r programmable
feature that ca n be programmed by t
he EST. The
coolant level feature is operati
onal if programmed
for 3-way warning or 3-way prote
ction. The feature
can not be enabled if the ECM was
not factory
programmed for 3-way protecti
on.
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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