Hino 238, Workshop Manual

Page: 382 / 919

ENGINE CONTROL SYSTEM (J08E) 4–1159
16
Check the
response
delay of the
VNT controller
Select [Check functions] from the
menu, then inspect the response
delay at the Target VNT position
and Actual VNT position.
<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
%.
<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.
Go to step 17.
Replace the
turbocharger.
Perform "After-
inspection
work" of
INFORMA-
TION section.
17
Inspect the
diesel throttle
valve Check if there are no abnormal
opening angles or that the valve is
not stuck.
Failure found:
Go to YES.
No failure
found: Go to
NO.
Replace the
diesel throttle
valve.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 18.
18
Inspect the
SCV
Perform the SCV free accelera-
tion test.
For a detailed procedure, refer to
the separate "SCV free accelera-
tion test" in the following pages.
Failure found:
Go to YES.
No failure
found: Go to
NO.
Repair or
replace the
faulty part.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 19
DTC: P244A Filtering performance (missing substrate) Inspection procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No