Hino 238, Workshop Manual

Page: 412 / 919

ENGINE CONTROL SYSTEM (J08E) 4–1189
13
Inspect the
external accel-
erator signal
[Hino-DX]
1. Set the starter switch to the
"ON" position.
2. Select [Data Monitor] menu,
and check that you do not
have a sensor signal output
of more than 5 % when the
accelerator sensor is at 0 %
position (Accelerator pedal
not operated).
Failure found:
Go to YES.
No failure
found: Go to
NO.
-Check the
external accel-
erator sensor.
Repair if nec-
essary.
-Replace the
DPR filter and
the burner
nozzle and
clean the
igniter.
-After DPR
manual regen-
eration, the
diagnosis pro-
cedure will be
complete.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 14.
14
Inspect injec-
tor [Hino-DX]
Check the injection quantity and
the rotational fluctuation.
1. Start the engine.
2. Select [Injection quantity]
from the [Data Monitor]
menu and measure the
amount of fuel consumption.
3. Select [Engine speed] from
the [Data Monitor] menu and
measure the rotational fluc-
tuation.
<Measurement conditions>
Engine speed: 1,500 r/min
No-load, Neutral, A/C off and Air
compressor un-operating
Engine coolant temperature:
more than 80

C {176

F}
<Standard values>
Injection quantity (mm
3
/st): 5.0 q
or more for with MT vehicle , 6.0 q
or more for with Allison

2200,
2500, 3500 vehicle. Rotation fluc-
tuation (r/min): 26 or less (for with
all type of transmission vehicle).
Measure-
ments met the
standard
value. (Both
injection
amount and
rotational vari-
ation.): Go to
YES.
The measure-
ments do not
meet the stan-
dard value: Go
to NO.
-You forgot to
press the DPR
switch.
-Replace the
DPR filter and
the burner
nozzle and
clean the
igniter.
-After DPR
manual regen-
eration, the
diagnosis pro-
cedure will be
complete.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Replace the
injector.
Perform "After-
inspection
work" of
INFORMA-
TION section.
DTC: P244B Incomplete regeneration (check sheet 2) Inspection procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No