Navistar MaxxForce DT Diagnostic Manual page 23

Step
5 Determine if removed aftertreatment system components need to
be cleaned see the DPF and DOC reuse guidelines page 159.
Based on DPF and DOC Re-Use Guidelines, do any of the
removed aftertreatment system components need to be cleaned?
Step
6
Determine root cause of exhaust system contamination. (See
Engine Symptoms Diagnostics section in Engine Diagnostic
Manual.)
Step
7 Check for an engine no start. Turn ignition switch to ON position
and crank engine for a maximum of 20 seconds. If engine does not
start, wait 2 to 3 minutes and crank engine again for a maximum
of 20 seconds.
Does the engine start and run?
Action
Action
Action
https://www.truck-manuals.net/
DIAGNOSTIC MANUAL
Decision
Yes: Clean components
using appropriate cleaning
equipment. After cleaning
procedure is complete,
Install components and go
to step 7.
No: Install removed
aftertreatment system
components, and then go
to step 7.
Decision
After repairs are complete,
go to step 7.
Decision
Yes: Go to step 8
No: Go to Hard Start and
No Start Diagnostics
section in Engine
Diagnostic Manual.
19