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

2. KOEO Standard Test

Figure 270
Purpose
To determine electrical malfunctions detected by the
ECM self-test and Output Circuit Check (OCC)
Tools
• EST with MasterDiagnostics® software
• EZ-Tech® interface cable
NOTE: If an EST is not available, see "Standard Test
Using Cruise Switches" in Section 3 (page 72).
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.
1. Set parking brake to ensure the correct signal
from the Electronic System Controller (ESC).
2. Turn the ignition switch to ON. (Do not crank
engine.)
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
6 PERFORMANCE DIAGNOSTICS
Figure 271 KOEO Standard Test
3. Select Diagnostics from the menu bar.
4. Select Key-On Engine-Off Tests from the drop
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.
5. From the KOEO Diagnostics menu, select
6. Record all DTCs on Diagnostic Form.
7. Correct problem causing active DTCs.
8. Clear DTCs.
Possible Causes
•
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
down menu.
Standard, then select Run to start the test.
The ECM will complete an internal self-test and
an OCC. When the OCC is over, the DTC window
will show DTCs, if there is a problem.
NOTE: This test takes less than 5 seconds.
While the test is running, the MasterDiagnostics®
screen displays message Diagnostics Running .
"Diagnostic Trouble Codes" – Appendix C (page
643) for DTCs.
Failed electrical components or circuitry
213
See