Koeo Injector Test - Navistar International DT 466 Diagnostic/Troubleshooting Manual

5. KOEO Injector Test

Figure 178
Purpose
To determine if fuel
(electronically) by energizing
programmed sequence. The ECM monitors the IDM
results from this test and transmits DTCs, if injectors
or injector circuits are not working correctly.
Tools
• EST with MasterDiagnostics® software
• EZ-Tech® interface cable
Procedure
WARNING: To avoid serious personal injury,
possible death or damage to the engine or
vehicle, read all safety instructions in the "Safety
Information" section of this manual.
NOTE: The KOEO Injector Test can only be done with
the EST using MasterDiagnostics® software.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
5 HARD START AND NO START DIAGNOSTICS
injectors are working
injectors in
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
a
Figure 179 KOEO Injector Test
1. Select Diagnostics from the menu bar.
2. Select Key-On Engine-Off Tests from the drop
down menu.
NOTE: When using the EST to do KOEO or KOER
diagnostic tests, Standard Test is always selected
and run first. If the ignition switch is not cycled, the
Standard Test does not have to be run again.
3. From the KOEO Diagnostics menu, select
Injector, then select Run to start the test.
NOTE: During this test, injector solenoids should
click in a numerical sequence, not the firing order,
when actuated. If a series of clicks are not heard
for each injector, one or more injectors are not
activating.
The DTC window will show DTCs for electrical
problems.
4. Record DTCs on Diagnostic Form.
"Diagnostic Trouble Codes" – Appendix C (page
643) for DTCs.
5. Correct problem causing active DTCs.
6. Clear DTCs.
EGES-270-1
155
See