Hino 238, Workshop Manual

Page: 335 / 919

ENGINE CONTROL SYSTEM (J08E) 4–1112
3
Inspect the air
cleaner ele-
ment
1. Check there is no dirt, dam-
age or clogging in the air
cleaner element.
2. Make sure the element is a
Hino genuine part.
Failure found:
Go to YES.
No failure
found: Go to
NO.
Clean or
replace the air
cleaner ele-
ment.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 4.
4
Inspect the air
flow sensor
1. Check the installation of the
air flow sensor.
2. Make sure there is no dirt or
damage to the air flow sen-
sor.
Failure found:
Go to YES.
No failure
found: Go to
NO.
If dirt, clog-
ging or dam-
age was
found, replace
the sensor.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 5.
5
Inspect the air
flow sensor
connector Check the connection of the air
flow sensor connector (Loose-
ness 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 6.
6
Check the air
intake system
Check the air intake system
(between air cleaner and diesel
throttle) for dirt, clogging, or dam-
age
The measure-
ments meet
the standard
value: Go to
YES.
The measure-
ments do not
meet the stan-
dard value: Go
to NO.
Clean or
replace.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 7.
7
Inspect the
boost pressure
sensor
1. Check the installation of the
boost pressure sensor.
2. Make sure there is no dirt or
damage to the boost pres-
sure sensor.
Failure found:
Go to YES.
No failure
found: Go to
NO.
Clean the
boost pressure
sensor and
install it prop-
erly.
If dirt, clog-
ging or dam-
age was
found, replace
the sensor.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 8.
DTC: P240F EGR flow slow response Inspection procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No