Navistar International DT 466 Diagnostic/Troubleshooting Manual page 251

Figure 320 KOER IDT I6 .ssn
1. While engine is
KOER_IDT_I6.ssn. to monitor engine operation.
Figure 321 Injector Disable Test
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
6 PERFORMANCE DIAGNOSTICS
running, open D_
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
2. Select Diagnostics from menu bar.
3. Select I6 Injector Disable Test from drop down
menu.
NOTE: 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.
• When the EOT indicator is green and the
engine temperature is 70 °C (158 °F) or
higher, fuel rate and timing are more stable,
making comparisons from cylinder to cylinder
more accurate. Overall engine operation is
more stable.
4. Select cylinder number and select Run. (Injector
selected will be disabled and engine noise should
change.)
5. Select Normal Operation. Injector will be enabled
and engine noise should return to previous state
of operation.
6. Repeat steps 4 and 5 for the remaining cylinders.
NOTE: Listen for tone changes from cylinder to
cylinder.
NOTE: If any injectors are removed and
reinstalled or replaced, test drive vehicle for
20 miles before checking for misfire or rough idle.
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