Parked Regen Checks - Navistar MaxxForce DT Diagnostic Manual

Using EST with ServiceMaxx™ software, open the Aftertreatment session. Open the inhibitors tab and check
for Inhibitors.
Checks
Engine condition
DPF Status
Engine Coolant
Temperature
AFT Regen Status
EGR Position
ETV Position
DOCIT
DOCOT
DPFOT
DPFDP
If the DPF is face plugged, measure the distance between the filter and outlet. If not within specification,
the filter cannot be cleaned and must be replaced.
Table 184 Parked Regen Checks
Expected Results Comment
Smooth, not stumbling If engine does not run smoothly, diagnose engine
performance problem. See "PERFORMANCE
DIAGNOSTICS in appropriate Engine Diagnostic Manual.
Regen Needed
If signal reads "Not needed", than a Regen cannot be
commanded to run.
Above 150ºF (66ºC) If below 150ºF (66ºC), warm engine above set point.
Active If signal reads "Not Active", check for fault codes and
Parked Regen Inhibitors.
Closed If not closed, diagnose sensor or circuit (See appropriate
Engine Diagnostic Manual).
80% ±5% If not within specifications, see diagnose sensor or circuit
(See appropriate Engine Diagnostic Manual).
482ºF (250ºC) to If below 482ºF (250ºC), using Electronic Service Tool
572ºF (300ºC) (EST) with ServiceMaxx™ software, run the KOER Air
Management Test.
If above 572ºF (300ºC), check for proper ETV operation,
and if engine is over fueling.
After 5-10 minutes If below 986ºF (530ºC), diagnose and repair active
above 986ºF (530ºC) DOCOT fault code(s) (Ex. SPN 4766 FMI 10). If no active
fault code(s), go to appropriate aftertreatment system
diagnostics section in this manual.
Below 1292ºF (700ºC) If above 1292ºF (700ºC), diagnose and repair active
DPFOT fault code(s). If no active fault code(s), go to
appropriate aftertreatment system diagnostics section in
this manual.
Below 0.5 psi (3.4 If above 0.5 psi (3.4 kPa), after the system completes a
kPa) full Parked Regen, diagnose and repair active DPFDP
fault code(s). If no active fault code(s), go to appropriate
aftertreatment system diagnostics section in this manual.
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DIAGNOSTIC MANUAL
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