7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS 435
The EOT sensor is supplied with a 5 V re ference
voltage at Pin 2 from ECM Pin X2–1. The sensor
is grounded at Pin 1 through the signal ground at
ECM Pin X1–6. As the oil tem perature increas es
or decreases, the sensor changes resistance and
provides the oil temperature signal voltage at the
ECM. The signal voltage is monitored by the ECM to
determine the temperature of the oil.
Fault Detection / Management
The ECM continuously monitors the signal of the EOT
sensor to determine if the signal is within an expecte d
range. If the ECM detects an out of range high or low,
the ECM will ignore the EOT signal and assume an
engine oil temperature of –20 °C (–4 °F) for starting
and 100 °C (212 °F) for engine running conditions.
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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