TATA Motors HARRIER Owner's Manual page 225

Diesel Particulate Fil-
ter (DPF) Warning Indi-
cator
Your vehicle is equipped with a Diesel
Particulate Filter (DPF). DPF is a me-
chanical filter that physically traps par-
ticulate matter from diesel engine ex-
haust gas.
DPF traps the particulate matter in the
following way:

– Particulates / soot are
Filtration
collected in the inlet channel of the
filter.

– When the filter
Regeneration
channels are filled up with soot, they
are cleaned automatically by the en-
gine management system. This pro-
cess is known as DPF Regeneration
and this will happen during normal
running of the vehicle.
DPF equipped in vehicle normally regen-
erates automatically which is controlled
by engine management system.
In certain specific driving conditions,
DPF regeneration may not happen auto-
matically as the desired temperatures
required to regenerate soot may not be
achievable due to specific driving condi-
tions. This includes prolonged driving at
low vehicle speeds for considerable
amount of time (driving in heavy city traf-
fic), prolonged running of the engine in
idle conditions etc. In such cases, a
warning lamp as indicated above will be
illuminated in the instrument cluster in-
dicating that soot regeneration is insuffi-
cient.
This warning lamp switches ON con-
stantly to indicate that the DPF needs to
be regenerated. This lamp does not indi-
cate any malfunction.
The warning lamp remains OFF during
normal vehicle behavior and lights up
only when driving condition requires the
driver to be notified. When this lamp is
ON, keep the car running ideally at 3
gear, km/hr with engine speed over
60
rpm until regeneration is com-
2000
pleted and warning lamp goes OFF. The
MAINTENANCE
process normally takes about 20
minutes.
NOTE
Do not shut down engine till the
warning lamp goes OFF.
If DPF regeneration process requested
above is not followed for a long distance
and the vehicle is driven
with warning lamp ON, it can
cause MIL to be turned ON.
Once MIL is ON, please con-
tact nearest TATA authorized service
center.
Service should connect the TML diag-
nostic tool and conduct DPF service re-
generation as indicated in the diagnostic
tool.
Insufficient DPF regeneration resulting
in the above lamps can also happen if
the vehicle is driven with adultered die-
sel.
rd
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