Failure Code [Ca452] Rail Press. Sensor Low Error; Failure Code [Ca553] Rail Press. High Error - Komatsu Galeo PC138US-8 Shop Manual

SEN02464-01

Failure code [CA452] Rail press. sensor low error

User code Failure code
E11
Contents of
• Low voltage was detected in common rail pressure sensor circuit.
trouble
Action of
• Limits output and continues operation (Limits common rail pressure).
controller
Problem that
appears on
• Output drops.
machine
• Signal voltage of common rail pressure sensor can be checked with monitoring function.
Related
(Code: 36401 Common rail pressure sensor voltage)
information
• Method of reproducing failure code: Turn starting switch ON.
Possible causes
and standard
value in normal
state

Failure code [CA553] Rail press. high error

User code Failure code
E15
Contents of
• Common rail pressure sensor circuit detected abnormally high pressure (level 1).
trouble
Action of
• None in particular.
controller
Problem that
appears on
• Output drops.
machine
• Common rail pressure can be checked with monitoring function.
Related
(Code: 36400 Common rail pressure)
information
• Method of reproducing failure code: Start engine.
1 Defective related system
2 Use of improper fuel
Defective electrical system of
3
Possible causes
common rail pressure sensor
and standard
Defective mechanical system
value in normal
4 of common rail pressure sen-
state
sor
5 Defective overflow valve
6 Clogging of overflow piping
7 Defective pressure limiter
16
Trouble
CA452
Cause
Carry out troubleshooting for failure code [CA451].
Trouble
CA553
Causes
Rail press. sensor low error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
Rail press. high error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
If another failure code is indicated, carry out troubleshooting for it.
Check fuel used directly
(for high viscosity).
Common rail pressure sensor may have electric trouble. Carry out
troubleshooting for failure code [CA451].
Check mechanical system of common rail pressure sensor directly.
Check overflow valve directly for broken spring, worn seat, and
stuck ball.
Check overflow piping directly for clogging.
Check pressure limiter directly for mechanical defect.
40 Troubleshooting
1
1
PC138US, USLC-8