Hino 238, Workshop Manual

Page: 164 / 919

ENGINE CONTROL SYSTEM (J08E) 4–941
8
Inspect the
DEF injector 1
[Hino-DX]
Remove the DEF injector from the
muffler and select [Check func-
tions] 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 nor-
mal: Go to
YES.
Operation not
normal: Go to
NO.
Re-install the
DEF injector
onto the muf-
fler.
Go to step 10.
Go to step 9.
9
Inspect the
DEF injector 2
[Hino-DX]
Replace the DEF injector with a
new one (Do not install it on the
muffler.) and perform DEF addi-
tion test as same as step 8.
Operation nor-
mal: Go to
YES.
Operation not
normal: Go to
NO.
Install the new
injector on the
muffler and
complete the
check.
After installing
the injector,
idle the engine
(for about 10
min.) and on
Hino-DX (Data
Monitor) verify
that the DEF
solution is sta-
ble between
800 kPa {116
psi} and 1,051
kPa {152 psi}.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Re-install the
DEF injector
and replace
the DEF pipe
(pressure
line).
After replac-
ing the pipe,
idle the engine
(for about 10
min.) and on
Hino-DX (Data
Monitor) verify
that the DEF
solution is sta-
ble between
800 kPa {116
psi} and 1,051
kPa {152 psi}.
Perform "After-
inspection
work" of
INFORMA-
TION section.
DTC: P207F Improper reductant Inspection procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No