Failure Code [Ca559] Rail Press Low Error - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02630-05

Failure code [CA559] Rail Press Low Error

Action code Failure code
E15
Contents of
• There is low pressure error (1) in common rail circuit.
trouble
Action of con-
• None in particular.
troller
Problem that • Engine does not start at all or does not start easily.
appears on • Exhaust gas becomes black.
machine • Engine output lowers.
Related infor-
• Method of reproducing failure code: Start engine.
mation
1 Fuel leakage to outside
Possible causes
and standard
value in normal
Defect in low pressure cir-
state
2
cuit parts (Note 1)
30
Trouble
CA559
Cause
Common rail pressure low error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
Fuel may be leaking to outside. Check it directly (Check visually
while running engine at low idle).
a
For check of pressure in fuel low pressure circuit, see Testing
and adjusting, Checking fuel pressure.
• Measured in fuel filter inlet side.
• Cranking speed: Min. 150 rpm
Pressure in fuel low-
pressure circuit
a
For check of pressure in fuel low pressure circuit, see Testing
and adjusting, Checking fuel pressure.
• Measured in fuel filter outlet side.
Pressure in fuel low-
pressure circuit
a
For check of pressure in fuel low pressure circuit, see Testing
and adjusting, Checking fuel pressure.
• Measured in fuel filter inlet and outlet sides.
• Pressure drop in fuel low-pressure circuit = Fuel filter inlet pres-
sure – Fuel filter outlet pressure
Pressure drop in fuel
low-pressure circuit
a
For check of fuel suction pressure, see Testing and adjusting,
Checking fuel pressure.
• Measured in gear pump fuel inlet side of supply pump.
Fuel suction circuit
pressure (gear pump
side)
a
For check of fuel suction pressure, see Testing and adjusting,
Checking fuel pressure.
• Measured in fuel connector side.
Fuel suction circuit
pressure (fuel con-
nector side)
40 Troubleshooting
Min. 0.14 MPa
During cranking
{Min. 1.4 kg/cm
Min. 0.48 MPa
During high idle
{Min. 4.9 kg/cm
Max. 0.14 MPa
During high idle
{Max. 1.4 kg/cm
Max. 33.9 kPa
During high idle
{Max. 254 mmHg}
Max. 27.1 kPa
During high idle
{Max. 203 mmHg}
1
2
}
2 }
2
}
PC300, 350-8