Isuzu D-MAX 2020 Owner's And Driver's Manual page 622

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CONTROLS AND INSTRUMENTS
The DPD removes particulate matter (PM) from the diesel exhaust gases. PM is filtered
from the exhaust gas and accumulated in the DPD. When PM accumulates to level
predetermined by the engine control module, the DPD automatically burns the PM in a
process called regeneration. Regeneration may not be completed under certain driving
conditions. If this occurs, the DPD operator regeneration indicator light will flash to
prompt for the completion of DPD regeneration.
The DPD will regenerate itself as part of normal operation. The engine control module
controls this function based on several factors. During regeneration, the engine idle
speed will increase. When this occurs, the DPD is automatically regenerated. This
does not indicate a failure.
ADVICE
• The DPD performs regeneration automatically when a certain amount of PM
accumulates in the DPD. Regeneration occurs during driving and the DPD
operator regeneration indicator light does not come on during regeneration.
Depending upon driving conditions, however, the regeneration may sometimes
not be completed. In this case, the DPD operator regeneration indicator light will
flash, so perform operator regeneration as soon as possible according to the
"Operator Regeneration Procedure". This operation recovers the function of the
DPD. It does not mean that a failure has occurred.
NOTE
• Regeneration time may differ depending on outside temperature, engine coolant
temperature and driving conditions.
• During regeneration, white smoke may be temporarily produced from the
exhaust pipe. This results from combustion of PM, it does not indicate a failure.
• The engine coolant temperature may rise during regeneration.
• Automatic regeneration is performed under normal driving conditions, however,
operator regeneration may be required under the following conditions.
- If the vehicle is only driven at low speeds
- If the engine is frequently started and stopped
- If the engine frequently idles for extended periods (1 hour or more)
- If the engine is habitually stopped before engine warming is complete
Diesel Particulate Defuser (DPD)
Automatic Regeneration of DPD