Failure Code [Da25Kp] 5V Sensor 1 Power Abnormality - Komatsu PC130-8 Shop Manual

SEN04120-03

Failure code [DA25KP] 5V sensor 1 power abnormality

User code Failure code
— DA25KP
Contents of
• Voltage of 5V sensor power supply output 1 circuit is below 2.5 V or above 6.0 V.
trouble
Action of • Turns output of 5V sensor power supply output 1 OFF.
controller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that • Automatic gear shifting function does not work (pump pressure sensor system).
appears on • Auto-decelerator keeps working and is not reset or fine control performance of work equipment is
machine lowered (PPC pressure sensor system).
Related
• Method of reproducing failure code: Turn starting switch ON.
information
Defective pressure sensor
1
(Internal short circuit)
Possible causes
and standard
value in normal
state
Ground fault in wiring har-
2 ness (Short circuit with GND
circuit)
42
5V sensor power supply output 1 abnormality
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Disconnect connector with starting switch OFF, then turn start-
ing switch ON and carry out troubleshooting.
Disconnect sensors at right in
order and carry out operation to
reproduce trouble. If "E" of fail-
ure code goes off when a sensor
is disconnected, that sensor is
defective.
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CP01 (female) (73)
– P01 (female) (2) and chassis ground
[Bucket DIGGING PPC pressure switch sys-
tem]
Wiring harness between CP01 (female) (14)
– P02 (female) (2) and chassis ground
[Boom DOWN PPC pressure switch system]
Wiring harness between CP01 (female) (16)
– P03 (female) (2) and chassis ground
[Swing RIGHT PPC pressure switch sys-
tem]
Wiring harness between CP01 (female) (17)
– P04 (female) (2) and chassis ground
[Arm DIGGING PPC pressure switch sys-
tem]
40 Troubleshooting
Bucket DIGGING
P01
PPC pressure switch
Boom DOWN PPC
P02
pressure switch
Swing RIGHT PPC
P03
pressure switch
Arm DIGGING PPC
P04
pressure switch
Bucket DUMP PPC
P05
pressure switch
Boom UP PPC
P06
pressure switch
Swing LEFT PPC
P07
pressure switch
Arm DUMP PPC
P08
pressure switch
Pump pressure
P25
sensor
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
PC130-8
1