Hino 238, Workshop Manual

Page: 859 / 919

DEF SCR SYSTEM (DCU) 5–293
8
Inspect the
intake mani-
fold tempera-
ture sensor
1. Check the installation of the
intake manifold temperature
sensor.
2. Make sure there is no dirt or
damage to the intake mani-
fold temperature sensor.
Failure found:
Go to YES.
No failure
found: Go to
NO.
Clean the
intake mani-
fold tempera-
ture sensor
and install it
properly.
If damaged,
replace the
intake mani-
fold tempera-
ture sensor .
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 9.
9
Inspect the
intake mani-
fold tempera-
ture sensor
unit
Measure the resistance between
the terminals of the intake mani-
fold temperature sensor.
<Tester connections>
Intake manifold temperature sen-
sor
THG – E2
<Standard values>
20

C {68

F}: 7.336
–
5.794 k

50

C {122

F}: 2.435
–
2.41 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 10.
Replace the
intake mani-
fold tempera-
ture sensor.
Perform "After-
inspection
work" of
INFORMA-
TION section.
10
Inspect the
NOx sensor 1
[Hino-DX]
Replace the NOx sensor 1 with a
new one, and check again if
DTCP2201 is detected in the
[DCU] after the starter switch is
ON.
DTC P2201
has been
detected: Go
to YES.
No DTC has
not been
detected: Go
to NO.
Replace the
DCU.
Perform "After-
inspection
work" of
INFORMA-
TION section.
NOx sensor 1
failure.
Install the new
NOx sensor 1.
Perform "After-
inspection
work" of
INFORMA-
TION section.
DTC: P2201
NOx sensor (SCR upstream) - Performance and
Monitoring capability
Inspection Procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No