Hino 238, Workshop Manual

Page: 324 / 919

ENGINE CONTROL SYSTEM (J08E) 4–1101
CHECKLIST: P22D3
DTC: P22D3 Nozzle stuck (VNT stick failure) Inspection procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No
1
Check the
DTC detected
1 (Engine
ECU) [Hino-
DX]
Check if any DTC other than
P22D3 has been detected in
[Engine].
DTC other
than P22D3
has been
detected: Go
to YES.
No DTC has
been detected:
Go to NO.
Go to the diag-
nostic proce-
dure of a
related DTC.
Go to step 3.
2
Check the
DTC detected
2 (Engine
ECU) [Hino-
DX]
Check if P22D3 has been
detected in [Engine].
DTC P22D3
has been
detected: Go
to YES.
No DTC has
been detected:
Go to NO.
Go to step 3.
Procedure
completed.
Perform "After-
inspection
work" of
INFORMA-
TION section.
3
Check the
response
delay of the
VNT controller
[Hino-DX]
Select [Check functions] from the
menu, then inspect the response
delay at the Target VNT position
and Actual VNT position.
! CAUTION
Perform the inspection while
the engine is stopped to avoid
damages.
<Inspection procedure>
(1) Select [Check functions].
(2) Select [VNT check].
(3) Click [Check start].
(4) Select [VNT opening UP]:
• Inspect the response delay
at each step of the Target
VNT position and Actual
VNT position from 0 to 90
%.
(5) Select [VNT opening DOWN]:
•
Inspect the response delay
at each step of the Target
VNT position and Actual
VNT position from 90 to 0
%.
HINT
The VNT opening position
changes of around 10 % per
step between 0
–
90 %.
<Standard values>
From the Target VNT position to
the Actual VNT position, the
response delay should be within 3
seconds.
The measure-
ments meet
the standard
value: Go to
YES.
The measure-
ments do not
meet the stan-
dard value: Go
to NO.
Procedure
completed.
Perform "After-
inspection
work" of
INFORMA-
TION section. Replace the
turbocharger.
Perform "After-
inspection
work" of
INFORMA-
TION section.