Navistar MaxxForce DT Diagnostic Manual page 123

Step
8 Run Down Stream Injection (DSI) System De-Aeration
Procedure twice, to purge the DSI system of air. Using
Electronic Service Tool (EST) with ServiceMaxx™
software, go to Procedures > KOER Aftertreatment
Procedures > DSI System De-Aeration.
Step
9
Using Electronic Service Tool (EST) with ServiceMaxx™
software, check Diagnostic Trouble Code (DTC) list for
any fault code(s) that may have become active during
OBFCT.
Does DTC list contain any active fault code(s)?
Step
10
Verify exhaust gas temperatures are within specification.
1. Using Electronic Service Tool (EST) with
ServiceMaxx™ software, go to Tests >
KOER Aftertreatment Tests > Onboard
Filter Cleanliness Test (OBFCT).
2. Go to Sessions > Performance and select
the record snapshot icon from the toolbar.
When OBFCT is complete, stop recording. Use the
playback feature and graph the following signal values
from OBFCT:
Signal Values
Signal Values:
• Diesel Oxidation Catalyst Inlet Temperature
(DOCIT)
• Diesel Particulate Filter Inlet Temperature (DPFIT)
• Diesel Particulate Filter Outlet Temperature
(DPFOT)
• DPF Soot Load
Compare snapshot to Graphs 6 and 8 page 129.
Which graph does snapshot most closely match?
Action
Action
Action
https://www.truck-manuals.net/
DIAGNOSTIC MANUAL
Decision
Go to step 9
Decision
Yes: Repair active fault code(s) (See
Electronic Control Systems Diagnostics in
Engine Diagnostic Manual). After repairs
are complete, go to step 10
No: Go to step 10
Decision
Graph 6: Repair complete
Graph 8: Go to Performance Diagnostics
in the Engine Service Manual. After
repairs are complete, retest for original
problem.
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