Navistar MaxxForce DT Diagnostic Manual page 39

Step
4 Using Electronic Service Tool (EST) with ServiceMaxx™ software,
Reset DPF soot load. Select Sessions > Programming > CDPF
Reset Request set value to yes, then select Program Engine. When
programming completes, run engine at wide open throttle (WOT) for
10 minutes. If a high soot load exists, you will see it after 10 minutes;
If the high soot load is false, the DPF soot load will be recalculated
to show the true soot load.
Which fault code for soot load is active?
Step
5 Do three Onboard Filter Cleanliness Tests (OBFCT) to decrease
soot load of Diesel Particulate Filter (DPF). Using EST, go to Tests >
KOER Aftertreatment Tests > Onboard Filter Cleanliness Test. After
OBFCTs are complete, check DTC list to determine if SPN 3719 FMI
16 dropped one FMI level to SPN 3719 FMI 15.
Did SPN 3719 FMI 16 drop one FMI level to SPN 3719 FMI 15?
Step
6 Do three Onboard Filter Cleanliness Tests (OBFCT) to clear SPN
3719 FMI 15. Using EST, go to Tests > KOER Aftertreatment Tests >
Onboard Filter Cleanliness Test. After OBFCTs are complete, check
DTC list to determine if SPN 3719 FMI 15 is still active.
Is SPN 3719 FMI 15 still active?
Action
Action
Action
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DIAGNOSTIC MANUAL
Decision
SPN 3719 FMI 16, go to Step
5
SPN 3719 FMI 15, go to Step
6
SPN 3719 or 3936 FMI 0, go
to Step 8
No code, go to Step 11
Decision
Yes: Go to step 6
No: Go to step 7
Decision
Yes: Go to step 8
No: Go to step 7
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