Navistar MaxxForce DT Diagnostic Manual page 93

Step
10 Run DSI System De-Aeration Procedure twice, to purge the
Down Stream Injection (DSI) system of air. Using EST, go to
Procedures > KOER Aftertreatment Procedures > DSI System
De-Aeration.
Step
11 Using EST, check Diagnostic Trouble Code (DTC) list for fault
code(s) that may have become active during OBFCT.
Does DTC list contain active fault code(s)?
Step
12
Verify exhaust gas temperatures are within specification.
1. Using Electronic Service Tool (EST) with
ServiceMaxx™ software, go to Sessions >
Performance and select the record snapshot icon
from the toolbar.
2. Go to Tests > KOER Aftertreatment Tests >
Onboard Filter Cleanliness Test.
When OBFCT is complete, stop recording. Use the playback
feature and graph the following signal values from OBFCT:
Signal Values:
• Diesel Oxidation Catalyst Inlet Temperature (DOCIT)
• Diesel Oxidation Catalyst Outlet Temperature (DOCOT)
• Diesel Particulate Filter Outlet Temperature (DPFOT)
• DPF Soot Load
Compare snapshot to Graphs 7 and 8 page 131.
Which graph does snapshot most closely match?
Action
Action
Action
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DIAGNOSTIC MANUAL
Decision
After procedure is complete, go to
step 11
Decision
Yes: Repair active fault code(s)
(See Electronic Control Systems
Diagnostics in Engine Diagnostic
Manual). After repairs are complete,
go to step 12.
No: Go to step 12
Decision
Graph 7: Go to step 13
Graph 8: After repairs are complete,
retest for original problem.
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