Hino 238, Workshop Manual

Page: 403 / 919

ENGINE CONTROL SYSTEM (J08E) 4–1180
CHECKLIST [sheet 1]: P244B
DTC: P244B Incomplete regeneration (check sheet 1) Inspection procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No
1
Check the
DTC detected
(Engine ECU)
[Hino-DX]
Check if any DTC other than
P244B has been detected in
[Engine].
DTC other
than P244B
have been
detected: Go
to YES
No DTC has
been detected:
Go to NO.
Go to diagno-
sis procedure
of a related
DTC.
Go to step 2.
2
Check the
DPR soot
accumulation
quantity
Check [PM amount of piling up]
from [DX Report] to read the DPR
soot accumulation quantity.
NOTICE
For the P244B code, there are
two types of DTC detection
conditions. The inspection
method depends on these con-
ditions. Check that the amount
of soot deposited from Hino-DX
report, and operate using the
method that matches the detec-
tion condition.
•
If the amount of deposited
soot is less than 5.0 g/L,
check "Sheet 1".
•
If the amount of deposited
soot is more than 5.0 g/L,
check "Sheet 2".
HINT
Refer to the chapter "HINO
DIAGNOSTIC EXPLORER" in
the section "Hino DX manual"
for the detail of Hino-DX report
(in the contents of "Past Work
Information").
[PM amount of
piling up] is
less than 5.0
g/L

YES
[PM amount of
piling up] is
more than 5.0
g/L

NO.
Go to step 3.
Go to the
[Sheet 2] diag-
nosis.
3
Check the
DPR filter
Remove DPR filter and check that
there is no soot leaking at the rear
edge of the DPR filter, no dam-
age, and no other abnormality.
Failure found:
Go to YES.
No failure
fond: Go to
NO.
Replace the
DPR filter and
the burner
nozzle and
clean the
igniter.
Go to step 7
after replace-
ment.
Go to step 4.