FORD 2015 Transit v.2 - Manual (Page 127)

If your vehicle is not ready for I/M testing,
you may need to:
•
Drive on an expressway or highway for
a steady 15 minutes, followed by 20
minutes of stop-and-go driving with at
least four 30-second idle periods.
• Allow your vehicle to sit for at least
eight hours without starting the engine.
Then complete the above driving cycle.
The engine must warm up to its normal
operating temperature. Do not switch the
ignition off until the above driving cycle is
complete. If your vehicle is still not ready
for I/M testing, you will have to repeat the
above driving cycle.
Diesel Exhaust System: Oxidation
Catalyst And Diesel Particulate
Filter System
Your vehicle is fitted with a diesel
particulate filter. The diesel particulate
filter is an inline filter in the exhaust system
that reduces carbon emissions by trapping
exhaust particles before they reach the
tailpipe. The diesel particulate filter looks
similar to a traditional exhaust catalyst,
except it is larger, and is part of the exhaust
system under the vehicle. The filter couples
to a diesel oxidation catalyst that reduces
the amount of harmful exhaust emitted
from the tailpipe. As soot gathers in the
system it begins to restrict the filter. The
soot that gathers inside the filter is cleaned
in two different ways, passive regeneration
and active regeneration. Both methods
occur automatically and require no actions
from the driver. During either one of these
regeneration methods, you may notice a
change in exhaust tone. At certain times,
the information display will display various
messages related to the diesel particulate
filter.
Diesel Particulate Filter Maintenance
Failure to carry out active or operator
commanded regeneration when advised
could result in a clogged diesel particulate
filter. If the diesel particulate filter fills
beyond the regeneration threshold, your
vehicle will disable the ability for active
and operator commanded regeneration.
This could result in irreversible damage to
the diesel particulate filter requiring
replacement that the Ford Warranty may
not cover. If your vehicle is not fitted with
operator commanded regeneration, check
with an authorized dealer for availability.
Passive Regeneration
During passive regeneration, the exhaust
system temperature and constituents
automatically clean the diesel particulate
filter, or reduce the soot level, by oxidizing
the soot. Cleaning occurs naturally during
normal engine operating conditions, at
varying levels depending on driving
conditions.
Active Regeneration
Once the diesel particulate filter is full of
exhaust particles, the engine control
module will command the exhaust system
to clean the diesel particulate filter through
a process called active regeneration. Active
regeneration requires the engine computer
to raise the exhaust temperature to
eliminate the particles. During cleaning,
the particles convert to harmless gasses.
Once cleaned the diesel particulate filter
will then be ready to continue trapping
exhaust particles.
The regeneration process operates more
efficiently when you drive your vehicle at
a steady speed of 30 mph (48 km/h) or
above for approximately 20 minutes to
complete the process. The frequency and
duration of regeneration will fluctuate by
how you drive your vehicle, outside air
temperature, and altitude. For most driving,
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Transit (TTH) Canada/United States of America, enUSA, Edition date: 03/2014, Third Printing
Fuel and Refueling