Komatsu 80001 User Manual

40 Troubleshooting SEN04120-03
PC130-8
45
Failure code [DA26KP] 5V sensor 2 power abnormality 1
Circuit diagram related
User code Failure code
Trouble
5V sensor power supply output 2 abnormality
(Pump controller system)
— DA26KP
Contents of
trouble
• Voltage of 5V sensor power supply output 2 circuit is below 2.5 V or above 6.0 V.
Action of
controller
• Turns output of 5V sensor power supply output 2 OFF.
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on
machine
Related
information
• Method of reproducing failure code: Turn starting switch ON.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
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
Resis-
tance
Min. 1 Mz
2
Hot short (Short circuit with
24V circuit) in wiring harness
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
Voltage Max. 1 V
3 Defective pump controller
If causes 1 – 2 are not detected, pump controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)

Komatsu 80001 Specifications

General

Brand	Komatsu
Model	80001
Category	Excavators
Language	English