78 3 DIAGNOSTIC SOFTWARE OPERATION
Figure 75 Standard test
2. Select Diagnostics from the menu bar.
3. Select Key-On Engine-Running Tests from the
drop down menu.
4. From the KOER Diagnostics menu, select
Standard and select Run to start the test.
The ECM increases engine idle to a predetermined
value and commands the IPR valve to set ICP to ra ted
speed pressure. If the performance of the ICP system
is acceptable, the ECM will control the IPR valv e
and red uce the pressure in st eps, wh ile continuing to
monitor the ICP system.
When the test is done, the ECM restores normal
engine operation, and the Diagnostic Trouble Code
window will display DTCs, if there are problems.
5. Correct problem causing active DTCs.
6. Clear DTCs.
Figure 76 Close session
7. When finished with this test, select Session from
menu bar, then Close.
NOTE: WhenusingtheESTtodoKOEOorKOER
diagnostic tests, Standard test is always selected
and run fi rst. If the ignition switch is not cycled, the
Standard test does not have to be run again.
Continuous Monitor Test
NOTE: ThistestcanonlybedonewiththeEST;
MasterDiagnostics® software is required.
The Continuous Monitor test troubleshoots
intermittent connections at sensors and actuators.
The engine can be off or running.
The EST monitors the following circuits:
• Accelerator Position Sensor (APS)
• Barometric Absolute P ressure (BAP)
• Battery Voltage (V
Batt
)
• Brake Control Pressure (BCP) (optional)
• EGR Valve Position (EGRP)
• Exhaust Back Pressure (EBP)
• Engine Coolant Level (ECL)
• Engine Fuel Pressure (EFP) (optional)
• Engine Oil Pressu re (EOP)
• Engine Oil Temperature (EOT)
• Intake Air Temperature (IAT)
• Injection Control Pressure (ICP)
• Manifold Air Te mperature (MAT)
• Manifold Absolute Pressure (MAP)
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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