DIAGNOSTIC MANUAL
Step
Action
Decision
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.
Go to step 9
Step
Action
Decision
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)?
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
Step
Action
Decision
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?
Graph 6: Repair complete
Graph 8: Go to Performance Diagnostics
in the Engine Service Manual. After
repairs are complete, retest for original
problem.
119
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