Failure Code [Da26Kp] 5V Sensor 2 Power Abnormality - Komatsu PC130-8 Shop Manual

40 Troubleshooting

Failure code [DA26KP] 5V sensor 2 power abnormality

User code Failure code
— DA26KP
Contents of
• Voltage of 5V sensor power supply output 2 circuit is below 2.5 V or above 6.0 V.
trouble
Action of • Turns output of 5V sensor power supply output 2 OFF.
controller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on
machine
Related
• Method of reproducing failure code: Turn starting switch ON.
information
Ground fault in wiring har-
1 ness (Short circuit with GND
circuit)
Possible causes
and standard
value in normal
Hot short (Short circuit with
state
2
24V circuit) in wiring harness
3 Defective pump controller
Circuit diagram related
PC130-8
5V sensor power supply output 2 abnormality
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CP01 (female) (8)
– A08 (female) (7) and chassis ground
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Wiring harness between CP01 (female) (8)
– A08 (female) (7) and chassis ground
If causes 1 – 2 are not detected, pump controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
SEN04120-03
1
Resis-
Min. 1 Mz
tance
Voltage Max. 1 V
45