Navistar Electrical Systems CV
Integration Guide
Page 30 of 84
Revision Date: 9/12/2019
vehicle operating conditions such as downhill acceleration can cause the
vehicle speed or engine rpm to exceed these limits and in those cases
the PTO system may disengage.
3.12. Prolonged or Extended PTO Operation
Warning:
While operating your vehicle in stationary PTO mode, the Diesel Particulate Filter
(DPF) will continue to filter the exhaust and accumulate soot. The engine control
system, depending on the speed and load being applied by the PTO, may not be
able to generate enough energy or adequate heat needed to clean or regenerate
the DPF. Continued operation under conditions that do not allow effective
regeneration or cleaning will eventually plug the DPF and result in reduced power.
The ENGINE POWER IS REDUCED Driver Information Center (DIC) message and
Malfunction Indicator Lamp will be displayed, and dealer/retailer service will be
required to return your vehicle to normal, full power operation. To prevent this from
occurring, frequently monitor your vehicle during PTO operation, paying particular
attention to the CLEAN EXHAUST FILTER SEE OWNER MANUAL NOW DIC
warning message or any horn chips if operating PTO remotely. If the DIC message
[or horn chirp] is presented during PTO operation, see OWNER MANUAL Diesel
Particulate Filter for information on how to clean or regenerate the DPF.
3.12.1. Diesel Particulate Filter [DPF] Cleaning during Stationary PTO Operation
If the DPF becomes sufficiently loaded with soot during a PTO session the system
will issue a DIC warning message and horn chirps as notification to the operator. If
the operator is outside the vehicle [remote operation] he must return to the cab and,
if running in
‘key out’ mode, insert and rotate the key to the ‘run’ position to respond
to the system messages. [Messages are not displayed unless the key is in the
‘run’
position.]
Notes:
Manual DPF [cleaning] regeneration can be initiated during a PTO idle up
session.
It is strongly recommended that the exhaust filter be cleaned before
continuous PTO usage if possible.
If a manual regen is initiated during the PTO session the PTOM will retain
control of the engine speed and the selected speed will not change as the
regen event initiates.
Low PTO engine speeds and light loading will cause regeneration to take
longer.
To initiate a manual DPF regeneration, see
“Manual Regeneration of Diesel
Particulate Filter
” under Diesel Particulate Filter in the Duramax Diesel Supplement
pamphlet in the glove box. See UI Bulletin xxx DPF Regen for more detail.
