Failure Code [Ca559] Rail Press Low Error - Komatsu PC200-8M0 Shop Manual

SEN06134-00

Failure code [CA559] Rail Press Low Error

Action
Failure code
level
L01 CA559
q
Detail of failure Low pressure error (1) is detected in common rail circuit.
Action of con-
q
None in particular
troller
q
Engine does not start at all or does not start easily.
Problem on
q
Exhaust gas becomes black.
machine
q
Engine output lowers.
q
Common rail pressure can be checked with monitoring function.
Related infor-
(Code: 36400 Common rail pressure)
mation
q
Method of reproducing failure code: Start engine.
Cause
1 Use of improper fuel
2 Fuel leakage to outside
3 Defect in low-pressure circuit parts
4 Defective pressure limiter
Defective injector
5 (including high-pressure piping in
cylinder head)
6 Defective supply pump
Defective common rail pressure
7
sensor system
Note 1: Check the low-pressure line parts for the following.
1) Fuel level
2) Clogging of fuel tank breather
3) Leakage or clogging of low-pressure fuel piping
4) Clogging of fuel pre-filter
5) Clogging of fuel main filter
6) Replace the fuel filter when the problem is not removed even if it is found to be not clogged.
38
40-302
Common Rail Pressure Low Error
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
Check fuel used as it may be improper one.
Fuel may leak to outside. Check it (Check visually while running engine at low
idle).
a For more information on troubleshooting, see Note 1.
a For check of fuel pressure in low-pressure circuit, see Testing and adjust-
ing, "Testing fuel pressure".
Negative pressure at fuel
supply pump inlet (outlet
side of fuel pre-filter)
Inlet pressure of fuel
main filter
a For check of leakage from pressure limiter, see Testing and adjusting,
"Checking fuel return rate and leakage".
Leakage from pressure
limiter
a For check of return rate from injector, see Testing and adjusting, "Checking
fuel return rate and leakage".
Return rate from injector
a For check of return rate from supply pump, see Testing and adjusting,
"Checking fuel return rate and leakage".
Return rate from supply
pump
Perform troubleshooting for failure codes [CA451] and [CA452]
302 Troubleshooting by failure code, Part 2

Failure code [CA559] Rail Press Low Error

At high idle
(if engine can be started)
During cranking
(if engine cannot be
started)
At low idle
(if engine can be started)
At low idle
During cranking
(if engine cannot be
started)
At low idle
(if engine can be started)
During cranking
(if engine cannot be
started)
At low idle
(if engine can be started)
PC200, 200LC, 220, 220LC-8M0
Max. -50.7 MPa
{Max. -380 mmHg}
0.3 to 1.1 MPa
2
{3.1 to 11.3 kg/cm }
0.5 to 1.3 MPa
2
{5.1 to 13.3 kg/cm }
0 cc (no leakage)
Max. 90 cc/min
Max. 180 cc/min
Max. 140 cc/min
Max. 1,000 cc/min