Check The Response Delay Of The Vnt Controller - Hino Motors HINO 155 series Workshop Manual

4

Check the response delay of the VNT controller

(2)
Are the measurements within standard value?
Procedure completed.
Perform "After-inspection work" of INFOR-
MATION section.
ENGINE (J05E)/TROUBLESHOOTING
1. Select [Inspection Menu] [VNT inspection] from the menu, and
inspect the response delay at the Target VNT position and Actual
(1)
VNT position.
(3)
! CAUTION
Perform the inspection while the engine is stopped to avoid
(4)
engine damages.
(5)
<Inspection procedure>
(1) Select [Inspection Menu].
(2) Select [VNT inspection].
(3) Select [Start inspection].
(4) Select [VNT UP].
SHTS021270300115
• Inspect the response delay at each step of the Target VNT position
and Actual VNT position from 0 to 90%.
(5) Select [VNT DOWN].
• Inspect the response delay at each step of the Target VNT position
and Actual VNT position from 90 to 0%.
HINT
The VNT opening position changes of 10% per step between 0 –
90%.
The response delay should be less than 3 seconds.
YES
Standard values
NO
Replace the turbocharger.
Perform "After-inspection work" of INFOR-
MATION section.
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