Failure Code [Da25Kp] 5V Sensor 1 Power Abnormality - Komatsu ecot3 PC300LC-8 Shop Manual

40 Troubleshooting

Failure code [DA25KP] 5V sensor 1 power abnormality

Action code Failure code
E02 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)
PC300, 350-8
5V sensor power supply output 1 abnormality
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a
Disconnect sensors at right in
order and carry out operation to
reproduce trouble. If "E" of failure
code goes off when a sensor is
disconnected, that sensor is
defective.
a
Wiring harness between CP01 (female) (34)
– P01 (female) (2), P01 (female) (1) – J03 –
ground (T08)
[Bucket DUMP PPC pressure switch system]
Wiring harness between CP01 (female) (53)
– P03 (female) (2), P03 (female) (1) – J03 –
ground (T08)
[Boom RAISE PPC pressure switch system]
Wiring harness between CP01 (female) (73)
– P04 (female) (2), P04 (female) (1) – J03 –
ground (T08)
[Bucket CURL PPC pressure switch system]
Wiring harness between CP01 (female) (17)
– P05 (female) (2), P05 (female) (1) – J03 –
ground (T08)
[Arm IN PPC pressure switch system]
Wiring harness between CP01 (female) (16)
– P07 (female) (2), P07 (female) (1) – J03 –
ground (T08)
[Swig RIGHT PPC pressure switch system]
Disconnect connector with starting switch OFF, then turn start-
ing switch ON and carry out troubleshooting.
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
SEN02630-05
Bucket DUMP PPC
pressure switch
Boom RAISE PPC
pressure switch
Bucket CURL PPC
pressure switch
Arm IN PPC
pressure switch
Swing RIGHT PPC
pressure switch
Swing LEFT PPC
pressure switch
Pump pressure 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
1
P01
P03
P04
P05
P07
P08
P25
63