DEF SCR SYSTEM (DCU)
5–105
INSPECTION PROCEDURE: P202E
1.
Check the DEF pipe (pressure line) and check if there are no dis-
connections, clogging, corrosion, or cracks.
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 the muffler.
3.
Set the starter switch to the "ON" position.
4.
Select [DCU].
5.
Select [Check functions] on Hino-DX menu and check the opera-
tion of the DEF injector.
<Inspection procedure>
(1) Select [Check functions].
(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.
1
Inspect the DEF pipe (pressure line) between the DEF pump and the DEF injector.
Was any failure found?
Replace the DEF pipe.
Perform "After-inspection work" of INFOR-
MATION section.
Go to step 2.
2
Inspect DEF injector (1) [Hino-DX]
(3)
(1)
(2)
SAPH16F020400071
Is operation normal?
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 ...
