Hino 238, Workshop Manual

Page: 494 / 919

ENGINE CONTROL SYSTEM (J08E) 4–1271
1. Select [Check functions] from the menu, then inspect the response
delay at the Target VNT position and Actual VNT position.
! CAUTION
• Perform the inspection while the engine is stopped to avoid
damages.
<Inspection procedure>
(1) Select [Check functions].
(2) Select [VNT check].
(3) Click [Check start].
(4) Select [VNT opening UP]:
• Inspect the response delay at each step of the Target VNT posi-
tion and Actual VNT position from 0 to 90 %.
(5) Select [VNT opening DOWN]:
•
Inspect the response delay at each step of the Target VNT posi-
tion and Actual VNT position from 90 to 0 %.
HINT
•
The VNT opening position changes of around 10 % per step
between 0
–
90 %.
NO YES
4
Check the response delay of the VNT controller 2 [Hino-DX]
(4)
(5)
(3)
(1)
(2)
SAPH16F010300995
Standard values
From the Target VNT position to the Actual VNT position, the
response delay should be within 3 seconds.
Do the measurements meet the standard value?
Procedure completed.
Perform "After-inspection work" of INFOR-
MATION section. Replace the turbocharger.
Perform "After-inspection work" of INFOR-
MATION section.