Komatsu 80001 User Manual

SEN04122-01 40 Troubleshooting
8 PC130-8
Failure code [DXE4KB] Service current EPC short 1
User code Failure code
Trouble
Service current EPC solenoid short
(Pump controller system)
— DXE4KB
Contents of
trouble
• When service EPC solenoid was driven, short circuit was detected in circuit.
Action of
controller
• Turns output to service EPC solenoid OFF.
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on
machine
• Attachment does not operate.
Related
information
• Drive current of service EPC solenoid can be checked with monitoring function.
(Code: 01700 Service EPC solenoid current)
• Method of reproducing failure code: Turn starting switch ON + Set in attachment mode (ATT).
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective service EPC sole-
noid (Internal short circuit or
ground fault)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
V30 (male) Resistance
Between (1) – (2) 7 – 14 z
Between (1) – chassis ground Min. 1 Mz
2
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 CP02 (female) (97)
– V30 (female) (1) and chassis ground
Resis-
tance
Min. 1 Mz
3 Defective pump controller
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP02 (female) Resistance
Between (97) – (115), (117),
(120)
7 – 14 z
Between (97) – chassis ground Min. 1 Mz

Komatsu 80001 Specifications

General

Brand	Komatsu
Model	80001
Category	Excavators
Language	English