7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS 453
IAT Operational Diagnostics
Figure 458 IAT circuit diagram
WARNING: To avoid serious personal
injury,
possible death, or damage to the en
gine or vehicle
– comply with the following:
Be careful to avoid rotating part
s (belts and fan)
and hot engine surfaces.
1. Using EST, open the D _Continuo
usMonitor.ssn.
Figure 459 Continuous Monitor Test
2. To monitor signal voltage, run KOEO Continuous
Monitor Test. For help, see “Continuous Monitor
Test” in Section 3 (page 68).
3. Monitor IAT signal voltage. Verify an active DTC
for the IAT circuit .
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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