Failure Code [Ca449] Rail Press Very High Error - Komatsu PC210-8 Shop Manual

UEN00241-01

Failure code [CA449] Rail Press Very High Error

User code Failure code
E11
Contents of
• There is high pressure error in common rail circuit.
trouble
Action of
• Limits output and continues operation.
controller
Problem that
• Engine sound becomes large when no or light load is applied.
appears on
• Engine output lowers.
machine
• Common rail pressure can be checked with monitoring function.
Related infor-
(Code: 36400 Common rail pressure)
mation
• Method of reproducing failure code: Start engine.
1 Defect in related system
2 Air in low pressure circuit
Defect in fuel return circuit
3
parts
Possible causes
and standard
value in normal
state
Defective common rail pres-
4
sure sensor
5 Defective pressure limiter
6 Defective supply pump
20
Trouble
CA449
Cause
Common rail pressure very high error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
If another failure code is displayed, carry out troubleshooting for it.
There may be air in low pressure circuit. Check it directly according
to the following procedure.
1) Remove pressure pickup plug (outlet side) of fuel main filter.
2) Operate feed pump of fuel pre-filter.
3) Check pressure pickup plug for leakage of fuel and air.
a For check of fuel return circuit pressure, see Testing and adjust-
ing, Checking fuel pressure.
Fuel return circuit Low idle running or
pressure
a Prepare with starting switch ON, then keep starting switch ON
and carry out troubleshooting in each case.
Monitoring code
(Machine monitor)
36400
Common rail
pressure
a For check of leakage through pressure limiter, see Testing and
adjusting, Checking fuel return rate and leakage.
Leakage through
pressure limiter
If causes 1 – 5 are not detected, supply pump may be defective.
40 Troubleshooting
Max. 0.02 MPa
cranking
{Max. 0.19 kg/cm
Monitoring information
0 ± 0.39 MPa
While engine is
stopped
{0 ± 4 kg/cm
During low idle 0 cc (No leakage)
PC210, 230, 240-8
1
2
}
2 }