Navistar International DT 466 Diagnostic/Troubleshooting Manual page 256

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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.
4. From the KOER Diagnostics menu, select Air
Management test and select Run to start the test.
The ECM will start the Air Management Test
and command the engine to accelerate to a
predetermined rpm.
the effects of the VGT and EGR control valve
movement using feedback signals from the EBP
sensor.
• If a problem is detected the ECM will cancel
the test, set a DTC, and restore normal engine
operation.
5. Record DTCs on Diagnostic Form.
"Diagnostic Trouble Codes" – Appendix C (page
643) for DTCs.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
6 PERFORMANCE DIAGNOSTICS
The ECM will monitor
See
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
6. Correct problems causing active DTCs. To help
do Test 14 VGT Test.
7. Clear DTCs.
Possible Causes
• Exhaust leaks
• Intake leaks
• Intake and exhaust restrictions
• Plugged EBP tube assembly
• Biased MAP or EBP sensor
• Failed VGT actuator
• Failed turbocharger
• Failed EGR control valve