Failure Code [Ca553] Common Rail Pressure High Error 1 - Komatsu PC88MR-10 Shop Manual

Failure code [CA553] Common Rail Pressure High Error 1

Action level Failure code
L01 CA553
High voltage (above the limit) appears and continued 15 or more seconds in signal circuit
Detail of
of common rail pressure sensor.
failure
Action of
None in particular
controller
Problem on
Engine output lowers.
machine
Signal voltage from common rail pressure sensor can be checked with monitoring
function. (Code: 36401 (V))
Related
Common rail pressure sensed by common rail pressure sensor can be checked with
information
monitoring function. (Code: 36400 (MPa))
Method of reproducing failure code: Start engine.
No. Cause
Defective relevant system
1
Improper fuel
2
Defective electric system of
3
common rail pressure sensor
Defective mechanical system
4 of common rail pressure
sensor
5 Defective overflow valve
Clogging of overflow piping
6
Defective pressure limiter
7
PC88MR-10
Common Rail Pressure High Error 1
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
If other failure codes are also displayed, perform troubleshooting for
them.
Fuel used may be improper. Check it (the viscosity is high).
Electrical system of common rail pressure sensor may be defective.
Perform troubleshooting for failure codes [CA451] and [CA452].
Common rail pressure sensor may have mechanical failure. Check it.
The overflow valve may has a damaged spring, worn seat, or ball
clogging trouble. Check it.
Check overflow piping for clogging.
The pressure limiter may have a mechanical failure. Check it.
40 Troubleshooting
Troubleshooting by failure code (Display of code)
(PC88MR-CA553-400-A-Z0-A)
40-189