3 DIAGNOSTIC SOFTWARE OPERATION 87
5. When finished with this test, select Session from
menu bar, then Close.
Manual Test - Engine Cold
The Manual test is best used when diagnosing each
cylinder for cold m is fi re, considering EOT changes.
The EOT indicator will change from red to green when
engine temperature reaches 70 °C (158 °F) or higher.
• If the EOT indicator is red, erroneous
comparisons are likely from cylinder to cylinder.
However, when diagnosing a cold misfire, a
technician can listen to tone changes from
cylinder-to-cy lin der.
• When the EOT indicator is green and the engine
temperature is 70 °C (158 °F) or higher, fuel rate
and timing are more stab le, makin g comparisons
from cylinder to cylinder more accurate. Overall
engine operation is more stable.
Shut off one injector at a time and listen for changes
in exhaust tone.
NOTE: If any injectors are remove d a n d rein stalle d
or replaced, test drive vehicle for 20 miles before
checking for misfire or rough idle.
Figure 92 K OER IDT I6 session
1. While engine is running, select
D_KOER_IDT_I6.ssn from the open
session file window and select OPEN to open
the session.
WARNING: To avoid serious personal injury,
possible death or damage to the engine or vehicle
- comply with the following: When running the
engine in the service bay, make sure the parking
brake is set, the transmission is in neutral or park,
and the wheels are blocked.
2. Select Dia g no st ics from me nu bar.
Figure 93 Injector Disable tests
3. Select I6 Injector Disable Tests from drop down
menu.
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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