Failure Code [Da25Kp] Press. Sensor Power Abnormality - Komatsu Galeo PC800-8 Shop Manual

SEN00791-02

Failure code [DA25KP] Press. Sensor Power Abnormality

Action code Failure code
— DA25KP
Contents of
• Abnormal current flowed in pressure sensor power supply (5V) circuit.
trouble
• Turns output to power supply (5V) circuit OFF.
Action of
• Even if phenomenon of failure disappears, system does not reset itself until starting switch is turned
controller
OFF.
• Signals of pressure sensor and jet sensor differential pressure sensor are not input normally.
Problem that • Failure code of abnormality in pressure sensor and jet sensor differential pressure sensor is displayed,
appears on too.
machine • Travel speed and work equipment speed do not rise.
• Fine control performance lowers.
Related
information
Defective pressure sensor
1
(Internal short circuit)
Possible causes
and standard
value in normal
state
Ground fault in wiring har-
ness
2
(Short circuit with GND cir-
cuit)
3 Defective pump controller
60
Press. Sensor Power Abnormality
Trouble
(Pump controller system)
Cause
aDisconnect connector with starting switch OFF, then turn starting
switch ON and carry out troubleshooting.
Disconnect sensors at
right in order. If no
error code is displayed,
that sensor is defec-
tive.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CP01 (female) (22) –
J24 – P25 (female) (3) and chassis ground
[F pump pressure sensor system]
Wiring harness between CP01 (female) (22) –
J24 – P26 (female) (3) and chassis ground
[R pump pressure sensor system]
Wiring harness between CP01 (female) (22) –
J24 – P27 (female) (3) and chassis ground
[F J/S differential pressure sensor system]
Wiring harness between CP01 (female) (22) –
J24 – P28 (female) (3) and chassis ground
[R J/S differential pressure sensor system]
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Standard value in normal state/Remarks on troubleshooting
F pump pressure
sensor
R pump pressure
sensor
F J/S differential
pressure sensor
R J/S differential
pressure sensor
CP01
Between (22) – (10)
40 Troubleshooting
P25 connector
P26 connector
P27 connector
P28 connector
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage
4.5 – 5.5 V
PC800, 850-8