Failure Code [Da25Kp] 5V Sensor 1 Power Abnormality - Komatsu PC200-8M0 Shop Manual

SEN06135-00

Failure code [DA25KP] 5V Sensor 1 Power Abnormality

Action
Failure code
level
– DA25KP
q
Detail of failure Voltage of 5V sensor power supply output 1 circuit is below 2.5 V or above 6.0 V.
q
Stops output of power from 5V sensor power supply output 1.
Action of con-
q
Even if cause of failure disappears, machine does not become normal until starting switch is turned
troller
q
Automatic travel speed selector function does not work (pump pressure sensor system).
Problem on
q
Auto-decelerator keeps working and is not canceled or fine control performance of work equipment
machine
is lowered (PPC pressure sensor system).
q
As T-adapter for pump controller connector is "socket-type box", operating voltage cannot be mea-
Related infor-
sured at pump controller connector.
mation
q
Method of reproducing failure code: Turn starting switch to ON position.
Cause
Defective pressure sensor
1
(Internal short circuit)
Hot short circuit in wiring harness
2
(Contact with 24 V circuit)
Ground fault in wiring harness
3
(contact with ground circuit)
4 Defective pump controller
14
40-303
Failure code [DA25KP] 5V Sensor 1 Power Abnormality
5 V Sensor 1 Power supply voltage Abnormality
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect following sensors one by one, and turn starting switch to ON
position for each troubleshooting.
a If this failure code disappears, disconnected sensor is defective.
3. After each troubleshooting, turn starting swith to OFF position.
Sensor
Bucket CURL PPC pressure sensor
Boom DOWN PPC pressure sensor
Bucket DUMP PPC pressure sensor
Arm IN pressure sensor
Boom RAISE PPC pressure sensor
Swing RIGHT PPC pressure sensor
Arm DUMP PPC pressure sensor
Swing LEFT PPC pressure sensor
F pump pressure sensor
R pump pressure sensor
a To measure voltage before controller stops output of power.
1. Turn starting switch to OFF position.
2. Disconnect connectors P01 to P08 and P25, and P26.
3. Connect T-adapters to female side of either of disconnected connectors
(e.g. P07).
4. Turn starting switch to ON position (with connectors P01 to P08, and P25
and P26 disconnected).
Between P07 (female) (3) and ground
1. Turn starting switch to OFF position.
2. Disconnect connectors C01, P01 to P08, and P25 and P26.
3. Connect T-adapters to female side of connector C01.
Between C01 (female) (9) and ground
If no failure is found by above checks, the pump controller is defective. (Since
this is an internal defect, troubleshooting cannot be performed.)
303 Troubleshooting by failure code, Part 3
Connector
Voltage
Resistance Min. 1 Mz
PC200, 200LC, 220, 220LC-8M0
P01
P02
P05
P04
P06
P07
P08
P03
P25
P26
4.5 to 5.5 V