Navistar International DT 466 Diagnostic/Troubleshooting Manual page 90

86
Figure 88 Injector Disable Tests
2. Select Diagnostics from menu bar.
3. Select I6 Injector Disable Tests 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.
However, when diagnosing a cold misfire, a
technician can listen to tone changes from
cylinder-to-cylinder.
• When the EOT indicator is green and the
engine is at 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 Auto Run.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
3 DIAGNOSTIC SOFTWARE OPERATION
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
NOTE: While running the engine 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.
Figure 89 I6 Injector Disable test results (Auto
Run - Text View)
Figure 90 I6 Injector Disable test results (Auto
Run - Graph View)
During Auto Run, injectors are shutoff one at a time (1
through 6 numerical sequence). Base line data and
results for each cylinder is displayed in the window
(Text View) for I6 Injector Disable test results. Test
data for each cylinder can also be viewed by selecting
the (Graph View). When finished the engine will return
to normal operation.
Figure 91 Close session