Hino 238, Workshop Manual

Page: 379 / 919

ENGINE CONTROL SYSTEM (J08E) 4–1156
6
Inspect the dif-
ferential pres-
sure sensor
1. Inspect the sensor installa-
tion conditions.
2. Make sure there is no dirt or
damage to the differential
pressure sensor.
Failure found:
Go to YES.
No failure
found: Go to
NO.
Clean the dif-
ferential pres-
sure sensor
and install it
properly.
If damaged,
replace the
sensor.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 7.
7
Inspect the dif-
ferential pres-
sure sensor
unit
Measure the resistance between
the terminals of the sensor using
the electrical tester.
<Tester connections>
DPR differential pressure sensor
VCC
–
GND
VOUT
–
GND
<Standard values>
2
–
15 k

The measure-
ments meet
the standard
value: Go to
YES.
The measure-
ments do not
meet the stan-
dard value: Go
to NO.
Go to step 8.
Replace the
sensor.
Perform "After-
inspection
work" of
INFORMA-
TION section.
8
Inspect the
DPR filter
1. Remove the DPR filter and
check if there is no soot,
damages or other abnormal-
ities at its end.
2. Check for proof of a forceful
removal of the DPR filter.
Failure found:
Go to YES.
No failure
found: Go to
NO.
Replace the
DPR filter and
the burner,
and clean the
igniter.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 9.
9
Inspect the
exhaust gas
temperature
sensor (burner
inlet) connec-
tor
Check the connection of exhaust
gas temperature sensor connec-
tor (burner inlet) (Looseness and
poor contact).
Failure found:
Go to YES.
No failure
found: Go to
NO.
Connect
securely,
repair if
needed.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 10.
DTC: P244A Filtering performance (missing substrate) Inspection procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No