ENGINE CONTROL SYSTEM (J08E)
4–1065
1.
Set the starter switch to the "LOCK" position.
2.
Disconnect the ambient air temperature sensor connector.
3.
Use the electrical tester to measure the resistance between the
terminals of the ambient air temperature sensor.
NO
YES
NOTICE
Prepare a beaker or similar, plus a larger measuring vessel for
measuring the DEF to be injected, before perform this inspection.
(If the vessel is small, there is dispersion at the time of injection
from the injector, and the measuring quantity decreases.)
1.
Set the starter switch to the "LOCK" position.
2.
Remove the DEF injector from muffler.
3.
Connect the vehicle to Hino-DX.
4.
Set the starter switch to the "ON" position.
5.
Select [Check Function] and check the DEF injector actuation.
<Inspection procedure>
(1) Select [Check Function].
(2) Select [DEF addition test].
(3) Perform addition test as instructed on the Hino-DX screen.
(Perform all three patterns)
NOTICE
When the DEF tank temperature is -5
C (23
F) or lower, perform
warm-up to raise it to 10
C (50
F) or higher.
13
Inspect the ambient air temperature sensor unit
HH1+
LJK
HH1-
LGK
HH1-
HH1+
SAPH16F010300824
Measurement
conditions
Tester connections
Standard values
Starter switch:
LOCK
Ambient air temper-
ature sensor
HH1+
–
HH1-
25
C {77
F}:
1.7 k
Do the measurements meet the standard value?
Go to step 14.
Replace the ambient air temperature sensor.
Perform "After-inspection work" of INFOR-
MATION section.
14
Inspection of the DEF injector [Hino-DX]
(3)
(1)
(2)
SAPH16F010300825
Summary of Contents for 238
Page 201: ...ENGINE CONTROL SYSTEM J08E 4 978 Harness disconnection or short circuit ...
Page 215: ...ENGINE CONTROL SYSTEM J08E 4 992 Malfunction of sensor 2 Malfunction of engine ECU ...
Page 301: ...ENGINE CONTROL SYSTEM J08E 4 1078 8 Estimated failure factors Malfunction of engine ECU ...
Page 709: ...DEF SCR SYSTEM DCU 5 143 8 Estimated failure factors DEF pump pressure sensor malfunction ...
