Dpf Inspection And Cleaning - Isuzu NPR 2008 Owner's Manual

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DIESEL PARTICULATE FILTER (DPF)

DPF inspection and cleaning

Clean the DPF at every 100,000 miles (160,000 km) or every 3,000
hours at your Isuzu dealer. Refer to "Maintenance Schedule" in this
section.
NOTICE: Contact your Isuzu dealer for details of ash removal
equipment.
NOTICE: Pressure Difference Sensor 0 point Adjustment.
Every year, make a 0 point adjustment for the pressure difference
sensor that detects clogging in the DPF.
In addition, after every DPF inspection or DPF filter cleaning,
make a differential pressure sensor adjustment according to the
following procedure.
1. Turn the engine control switch to the "ON" position, and leave it for a
while. (Do not start the engine.)
2. Make sure that the DPF lamp comes on.
3. Make sure that the DPF lamp goes off in 30 seconds.
4. Turn the engine control switch to the "OFF" position, and leave it for
1 minute or more.
NOTICE: Perform zero point calibration of the pressure difference
sensor after the pressure difference sensor has cooled down to
the ambient temperature. After DPF regeneration, wait at least 2
hours before performing zero point calibration.
CAUTION:
• If you fail to clean the filter, the DPF and the engine may break
down or fuel economy may deteriorate.
• Contact your nearest Isuzu dealer for how to clean the filter.
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