Hino 238, Workshop Manual

Page: 694 / 919

DEF SCR SYSTEM (DCU) 5–128
CHECKLIST: P2047
DTC: P2047 DEF injector - functional Inspection Procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No
1
Inspect the
DEF injector
(1) [Hino-DX]
NOTICE
Prepare a beaker or similar,
plus a larger measuring vessel
for measuring the DEF to be
injected, before perform this
inspection.
(If the vessel is small, there is
dispersion at the time of injec-
tion from the injector, and the
measuring quantity decreases.)
1. Set the starter switch to the
"LOCK" position.
2. Remove the DEF injector
from the muffler.
HINT
Refer to the workshop manual
"SELECTIVE CATALYTIC
REDUCTION (SCR)" in the
chapter "EMISSION CONTROL
(J08E)" (S5-CJ08E10* or S5-
UJ08E10*) for removal and
installation of the DEF injector.
3. Set the starter switch to the
"ON" position.
4. Select [DCU].
5. Select [Check functions] on
Hino-DX menu and check
the operation of the DEF
injector.
<Inspection procedure>
(1) Select [Check functions].
(2) Select [DEF addition test].
(3) Perform addition test as
instructed on the Hino-DX screen.
(Perform all three patterns)
NOTICE
When the DEF tank tempera-
ture is -5

C (23

F) or lower,
perform warm-up to raise it to
10

C (50

F) or higher.
HINT
Refer to the section "System
individual function" in the
chapter "HINO Diagnostic
eXplorer" for detail of DEF
addition test.
Operation is
normal: Go to
YES.
Operation is
abnormal: Go
to NO.
Procedure
completed.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Replace the
DEF injector.
(Perform DPR
forced regen-
eration after
replacement.)
Perform "After-
inspection
work" of
INFORMA-
TION section.