80 3 DIAGNOSTIC SOFTWARE OPERATION
expected. The ECM monitors the feedback signal
values from the Exhaust Back Pressure (EBP) sensor
and compares those values to the expected values.
If a fault is detected the test will end, engine operation
will return to normal, and a DT C will be set.
If there are no faults, the test will be completed and
engine operation will return to normal.
Figure 80 Air Management session
1. With the engine running, select
D_KOER_AirManagement.ssn from the
open session file window and select OPEN to
open the session.
Figure 81 Air Managemen t test
2. Select Diagnostics from the menu bar.
3. Select Key-On Engine-Running Tests from the
drop down menu.
NOTE: WhenusingtheESTtodoKOEOorKOER
diagnostic tests, Standard test is always selected
and run fi rst. If the ignition switch is not cycled, the
Standard test does not have to be run again.
4. From KOER Diagnostics menu, select Air
Management and Run to start the test.
5. Correct pro b lem causing active DTC s.
6. Clear DTCs.
Figure 82 Close session
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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