DEF SCR SYSTEM (DCU)
5–279
2
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.
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.
Operation is
normal: Go to
YES.
Operation is
abnormal: Go
to NO.
Procedure
completed.
DEF crystal
clogging is
considered
resolved.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 3.
DTC: P20F4
DEF consumption failure
Inspection Procedure
Step
Action
Description
Judgement
Check
(Yes/No)
Yes
No
Summary of Contents for 238
Page 201: ...ENGINE CONTROL SYSTEM J08E 4 978 Harness disconnection or short circuit ...
Page 215: ...ENGINE CONTROL SYSTEM J08E 4 992 Malfunction of sensor 2 Malfunction of engine ECU ...
Page 301: ...ENGINE CONTROL SYSTEM J08E 4 1078 8 Estimated failure factors Malfunction of engine ECU ...
Page 709: ...DEF SCR SYSTEM DCU 5 143 8 Estimated failure factors DEF pump pressure sensor malfunction ...
