Hino Motors HINO 155 series Workshop Manual page 461

Select the cylinder to deactivate
Injection is stopped when OK is selected.
SHTS021270300390
Did you notice a difference in engine sound?
YES
<One out of A to D is abnormally loud or the
same as α>
Replace the abnormal injector.
Perform "After-inspection work" of INFOR-
MATION section.
ENGINE (J05E)/TROUBLESHOOTING
4. Stop injection for cylinder No. 1 and check the engine sound. (The
sound at this time shall be A.) Stop the test after checking.
HINT
During the test, the engine tries to maintain the original four-cylin-
der speed, but using only three cylinders, so that the sound A
becomes larger in comparison with the sound. (This is not abnor-
mal.)
As the engine is running with combustion of one cylinder less
than normal, it is normal that the vibrations increase.
For an engine with no injection or reduced injection quantity,
injection stop causes no vibration change.
For engines increasing the injection quantity for some cylinders,
the vibrations become larger when all cylinders are operating, and
the vibrations decrease when injection is stopped for the defec-
tive cylinder.
5. Sequentially stop the injection for cylinders No. 2, No. 3 and No. 4
in the same way as for a cylinder No. 1. (The measure sounds
shall be B, C and D respectively.)
HINT
• When the difference in the sound is difficult to detect, repeat
steps 4 and 5.
• if one of the sounds A to D is the same as α, always check for a
communication problem of the injector.
NO
Comparison of the sounds A to D shows no
clear difference
Procedure completed.
Perform "After-inspection work" of INFOR-
MATION section.
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