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© Copyright Mahindra and Mahindra Ltd.052016
If the DPF lamp starts ON while driving the vehicle, then it indicates
DPF regeneration has not occurred successfully. The same can be
due to heavy traffic driving conditions or frequent short trips. At this
moment, we suggest DPF regeneration must be done through a
specific driving methodology. The same is as mentioned below:
1. Drive the vehicle at a speed equal to or greater than 80
kmph on flat roads for 20– 25 minutes continuously without
interruption.
2. This will enable DPF regeneration process to get complete
successfully.
3. After completion of the above two points, turn ignition switch
OFF & ON. Check whether DPF lamp has gone OFF.
4. If it is still ON then repeat step 1 & step 2.
If the vehicle is not driven as stated above after getting the
notification through DPF lamp ON, then the regeneration
process will not get complete and results in DPF permanent
damage.
• It is normal that hot exhaust gas come out from the exhaust
system during the regeneration process. Take care that the
vehicle is not near any flammable materials, so as not to
cause a fire.
• In order to avoid burns & personal injury, keep away from
exhaust system.
• Follow speed limits & traffic regulations as defined by local
jurisdiction.
11.18 DIESEL EXHAUST FLUID (DEF)
Introduction
The exhaust after treatment system uses SCR (Selective Catalytic
Reduction) technology which requires Diesel Exhaust Fluid (DEF) for
reduction of NOx in order to enable the vehicle to comply with
emission regulations. DEF, is a NOx reduction agent. It is basically
an aqueous urea solution, having a urea content of 32.5% and with
the quality characteristics defined in ISO 22241-1 standard. DEF is
a non-flammable, non-toxic, colorless and water-soluble liquid. DEF is
stored in vehicle in a tank and provision is provided to refill it as per
requirements.
To enable SCR system to work efficiently and to ensure emission
conformance, DEF meeting quality requirements of ISO 22241-1
standard is mandatory. Even when DEF of correct specification is
filled, it’s useful life remain limited depending upon extent of
exposure of storage tank/vehicle to varying environmental
temperature conditions.
Refilling DEF is part of regular maintenance service job. As DEF
consumption is highly dependent upon driving conditions/pattern, it
is necessary to get the system refilled in-between the scheduled
STARTING AND DRIVING THE VEHICLE
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