Hino 238, Workshop Manual

Page: 290 / 919

ENGINE CONTROL SYSTEM (J08E) 4–1067
CHECKLIST: P2214
DTC: P2214
NOx sensor (SCR downstream)
- Performance and Monitoring capability
Inspection procedure
Step Action Description Judgement
Check
(Yes/No)
Yes No
1
Inspection of
the DEF
Check the DEF concentration.
<Standard values>
32.5 ± 2.5 %
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 2.
Replace the
DEF.
If the DEF
concentration
is below the
standard,
drain the DEF
solution
through the
tank drain with
the starter
switch ON,
and then refill
the tank with
at least 5 liters
{1.3 gallons} of
DEF solution.
Afterward,
drive the vehi-
cle and con-
firm that the
problem does
not recur
under driving
conditions.
Perform "After-
inspection
work" of
INFORMA-
TION section.
2
Inspect the
exhaust pipe
Check the exhaust pipe and make
sure it has no cracks or exhaust
leaks (soot leaks), and verify that
coupling flanges are properly
tightened.
Failure found:
Go to YES.
No failure
found: Go to
NO.
Repair or
replace the
exhaust pipe.
Perform "After-
inspection
work" of
INFORMA-
TION section.
Go to step 3.
3
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 4.