Failure Code [Da26Kp] 5V Sensor 2 Power Abnormality - Komatsu PC200-8M0 Shop Manual

SEN06135-00

Failure code [DA26KP] 5V Sensor 2 Power Abnormality

Action
Failure code
level
– DA26KP
q
Detail of failure Voltage of 5 V sensor power supply output 2 circuit is below 2.5 V or above 6.0 V.
q
Stops power supply from 5 V sensor power supply output 2 circuit.
Action of con-
q
Even if cause of failure disappears, machine does not become normal until starting switch is turned
troller
Problem on
q
Travel does not stable
machine
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
16
40-303
Failure code [DA26KP] 5V Sensor 2 Power Abnormality
5V sensor 2 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
L.H. travel FORWARD PPC pressure sensor
L.H. travel REVERSE PPC pressure sensor
R.H. travel FORWARD PPC pressure sensor
R.H. travel REVERSE PPC pressure sensor
a To measure voltage before controller stops output of power.
1. Turn starting switch to OFF position.
2. Disconnect connectors P09 to P12.
3. Connect T-adapter to female side of either of disconnected connectors
(e.g. P09).
4. Turn starting switch to ON position (with connectors P09 to P12 discon-
nected).
Between P09 (female) (3) and ground
1. Turn starting switch to OFF position.
2. Disconnect connectors C01, P09 to P12.
3. Connect T-adapters to female side of connector C01.
Between C01 (female) (8) 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
P09
P10
P11
P12
4.5 to 5.5 V