Navistar MaxxForce DT Diagnostic Manual page 15

Step
2C Check for Air Management System (AMS) issue. Using EST with
ServiceMaxx™ software, use the playback feature and graph the following
signal values from 0 to 60 MPH Test:
Signal Values:
• Engine Speed
• Engine Load
• Intake Manifold Pressure (IMP)
• Exhaust Back Pressure (EBP)
• Accelerator Pedal Position 1 (APP1)
Compare snapshot to Graph 4 and associated Graph Analysis page 55.
Is AMS operating as per Graph 4 Graph Analysis?
Action
https://www.truck-manuals.net/
DIAGNOSTIC MANUAL
Decision
Yes: Go to step 3
No: Diagnose and
repair AMS issue
(See Performance
Diagnostics
section in Engine
Diagnostic
Manual). After
repairs are
complete, retest
for original
problem.
11