Failure Code [Da25Kp] 5V Sensor 1 Power Abnormality - Komatsu Galeo PC138US-8 Shop Manual

SEN02464-01

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)
40
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-
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-
Wiring harness between C01 (female) (34)
– P01 (female) (2), P01 (female) (1) – J03 –
ground (T08)
[Bucket DUMP PPC pressure switch sys-
tem]
Wiring harness between C01 (female) (53)
– P03 (female) (2), P03 (female) (1) – J03 –
ground (T08)
[Boom RAISE PPC pressure switch system]
Wiring harness between C01 (female) (73)
– P04 (female) (2), P04 (female) (1) – J03 –
ground (T08)
[Bucket CURL PPC pressure switch system]
Wiring harness between C01 (female) (17)
– P05 (female) (2), P05 (female) (1) – J03 –
ground (T08)
[Arm IN PPC pressure switch system]
Wiring harness between C01 (female) (16)
– P07 (female) (2), P07 (female) (1) – J03 –
ground (T08)
[Swing RIGHT PPC pressure switch sys-
tem]
ing switch ON and carry out troubleshooting.
ing without turning starting switch ON.
40 Troubleshooting
Bucket DUMP PPC
P01
pressure switch
Boom RAISE PPC
P03
pressure switch
Bucket CURL PPC
P04
pressure switch
Arm IN PPC
P05
pressure switch
Swing RIGHT PPC
P07
pressure switch
Swing LEFT 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
Resis-
Min. 1 Mz
tance
PC138US, USLC-8
1