Hino S5-LJ05E04A Workshop Manual page 439

EXHAUST (J05E)
(5) When the differential pressure is unchanged check the following.
If the following are normal, the differential pressure sensor should
be replaced.
a. Check the differential pressure hose for cracks or hole open-
ings.
b. Check that the hose clamp is neither loose nor disconnected.
c. Check whether there is clogging in the differential pressure
pipe (DPR cleaner side).
Use the compressed air from one end of the pipe to check for
clogging. If the air passes to the other side easily, it is clear.
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