Isuzu 2008MY N Series Workshop Manual page 293

1A-290 Engine Control System (4HK1)
Step
1. Reconnect
harness connector(s) or components.
2. Turn ON the ignition for 30 seconds. DO NOT
start the engine. (This is to relearn exhaust
differential pressure sensor.)
3. Clear the DTC and reset the DPD Status with
6
a scan tool.
4. Turn OFF the ignition for 30 seconds.
5. Perform the DPD Regeneration with a scan
tool.
Did you complete the action?
1. Observe
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
7
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.
8
Are there any DTCs that you have not
diagnosed?
Action
all previously disconnected
the Exhaust Temperature
Value(s)
—
1
5.9 kPa (low
output) 2.5
kPa (high
output)
—
Yes
Go to Step 7
Ash cleaning must
be performed. Refer
to appropriate
procedure in
Section 1G Engine
Go to Step 8
Go to DTC List
No
—
Exhaust
System OK