Failure Code [Ca452] Rail Press Sensor Low Error; Failure Code [Ca553] Rail Press High Error - Komatsu Galeo PC800-8 Shop Manual

SEN00791-02

Failure code [CA452] Rail Press Sensor Low Error

Action code Failure code
E11 CA452
Contents of
• Low pressure error occurred in common rail pressure sensor circuit.
trouble
Action of
• Limits output and continues operation (limits common rail pressure).
controller
Problem that
appears on • Engine output lowers.
machine
Related • The signal voltage of the common rail pressure sensor can be checked with the monitoring function
information (Code: 36401 Common rail pressure sensor voltage).
Possible causes
and standard
value in normal
state

Failure code [CA553] Rail Press High Error

Action code Failure code
E15 CA553
Contents of
• There is high pressure error (level 1) in common rail pressure sensor circuit.
trouble
Action of
• None in particular.
controller
Problem that
appears on • Engine output lowers.
machine
Related • Common rail pressure can be checked with monitoring function
information (Code No. 36400: Common rail pressure).
1 Defect in related system
2 Use of improper fuel
Defective electrical system
3 of common rail pressure
Possible causes
sensor
and standard
value in normal
Defective mechanical sys-
state
4 tem of common rail pres-
sure sensor
5 Defective overflow valve
6 Clogged overflow piping
7 Defective pressure limiter
8
Rail Press Sensor Low Error
Trouble
(Engine controller system)
Cause
Carry out troubleshooting for failure code [CA451].
Rail Press High Error
Trouble
(Engine controller system)
Cause
If another failure code is displayed, carry out troubleshooting for it.
Fuel used may be improper. Check it directly.
(Viscosity is high)
Electrical system of common rail pressure sensor may be defective.
Carry out troubleshooting for failure code [CA451].
Mechanical system of common rail pressure sensor may be defective.
Check it directly.
Spring damage, seat wear, or ball fixing of overflow valve is suspected.
Check it directly.
Overflow piping may be clogged. Check it directly.
Pressure limiter may be damaged mechanically. Check it directly.
Standard value in normal state/Remarks on troubleshooting
Standard value in normal state/Remarks on troubleshooting
40 Troubleshooting
PC800, 850-8