Hino 238, Workshop Manual

Page: 758 / 919

DEF SCR SYSTEM (DCU) 5–192
CHECKLIST: P208B
DTC: P208B DEF pump motor - functional Inspection Procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No
1
Inspect the
DEF pump
[Hino-DX]
Replace with a new DEF pump,
and check the DEF pressure sta-
bility on Hino-DX's [Data Monitor].
1. Replace the DEF pump with
a new one. Start up the
engine and keep the engine
idling (about 10 minutes).
2. Select [DEF pump pressure]
from the [Data Monitor] and
check if the DEF pressure is
maintained around 900 kPa
(800 kPa
–
1,050 kPa)
{131 psi (116 psi
–
152 psi)}.
<Standard values>
DEF pressure: 900 kPa (800 kPa
–
1,050 kPa)
{131 psi (116 psi
–
152 psi)}.
Measured
value stabi-
lized within the
standard
value: Go to
YES.
Measured
value not sta-
bilized within
the standard
value: Go to
NO.
Procedure
completed.
Perform "After-
inspection
work" of
INFORMA-
TION section. Replace the
DCU.
Perform "After-
inspection
work" of
INFORMA-
TION section.