Isuzu 4HL1 Workshop Manual page 204

Engine control system
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1A-202 Engine Control System
Step
Replace the common rail (common rail
pressure sensor).
13
Is the action complete?
Review the DTC.
1.
Restore the vehicle.
2.
Bleed the air from the fuel system.
14
3.
Using Tech 2, clear the DTC.
4.
Perform test run and review the DTC.
Is DTC227 detected?
Inspect the common rail.
1.
Check the pressure limiter for fuel leak.
15
Is the common rail normal in condition?
Replace the common rail.
16
Is the action complete?
Replace the supply pump.
17
Is the action complete?
Check DTC227 will not be set again.
1.
Restore the vehicle.
2.
Bleed the air from the fuel system.
18
3.
Using Tech 2, clear the DTC.
4.
Perform test run and review the DTC.
Is DTC227 detected?
Action
Value(s)
Yes
Verify repair and
go to Step 18
Go to Step 15
Go to Step 17
Go to Step 18
Go to Step 18
Go to Step 2
No
Repair is
complete
Go to Step 16
Repair is
complete

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