Isuzu 2008MY N Series Workshop Manual page 250

Step
1. Turn ON the ignition, with the engine OFF.
2. Clear the DTC and the DPD Status with a
scan tool.
3. Turn OFF the ignition for 30 seconds.
4
Important: Engine oil must be replaced after
DPD slow regeneration is completed.
4. Perform the DPD Slow Regeneration with a
scan tool.
Did you complete the action?
1. Turn ON the ignition, with the engine OFF.
2. Clear the DTC and the DPD Status with a
scan tool.
3. Turn OFF the ignition for 30 seconds.
5
4. Perform the DPD Regeneration with a scan
tool.
Did you complete the action?
1. Observe the
parameter with a scan tool. Make sure the
temperature is less than 150 °C (302 °F). If
more than 150 °C (302 °F), let increase 1500
RPM without load. (Turn the idle up control
knob clockwise.)
2. Accelerate the engine to W.O.T. (accelerator
6
pedal full travel) and read the Exhaust
Differential Pressure parameter when the
Exhaust Temperature 1 parameter is reached
to 200 °C (392 °F).
Is the Exhaust Differential Pressure parameter
less than the specified value?
Observe the DTC Information with a scan tool.
7
Are there any DTCs that you have not
diagnosed?
Action
Exhaust Temperature
Engine Control System (4HK1)
Value(s)
—
—
1
5.9 kPa (low
output) 2.5
kPa (high
output)
—
Yes
Go to Step 6
Go to Step 6
Ash cleaning must
be performed. Refer
to appropriate
procedure in
Section 1G Engine
Go to Step 7
Go to DTC List
1A-247
No
—
—
Exhaust
System OK