Hino Motors HINO 155 series Workshop Manual page 516

2–480
10 MPa or more
ENGINE (J05E)/TROUBLESHOOTING
e. Before the maximum common rail pressure exceeds 222 MPa during
pressure increase, the actual rail pressure falls below the target rail
pressure rapidly.  Replace the common rail.
Accelerator pattern
222 MPa
Time
f. The maximum common rail pressure exceeds 222 MPa during pres-
sure drop.  Check the return pipe.
Accelerator pattern
222 MPa
Time
g. The pressure is disturbed at a given speed and the pressure
decreases at higher speed.  Replace the supply pump.
Engine speed pattern
The pressure is disturbed
at a given speed and the
pressure decreases at
higher speed.
Remains for 5 seconds or longer.
Time
Actual common rail pressure
Target common rail pressure
SHTS021270300446
Actual common rail pressure
Target common rail pressure
SHTS021270300447
Actual common rail pressure
Target common rail pressure
SHTS021270300448