Failure Code [Dxe4Ka] Service Current Epc Discon - Komatsu Galeo PC138US-8 Shop Manual

SEN02466-00

Failure code [DXE4KA] Service current EPC discon

User code Failure code
— DXE4KA
Contents of
• When service EPC solenoid was driven, disconnection was detected in circuit.
trouble
Action of • None in particular (Since no current flows, solenoid does not operate).
controller • If cause of failure disappears, system resets itself.
Problem that
appears on • Attachment does not operate.
machine
• Drive current of service EPC solenoid can be checked with monitoring function.
Related
(Code: 01700 Service solenoid current)
information
• Method of reproducing failure code: Turn starting switch ON + Set in attachment mode (ATT).
Defective service EPC sole-
1
noid (Internal disconnection)
Possible causes
Disconnection in wiring har-
and standard
ness (Disconnection in wiring
2
value in normal
or defective contact in con-
state
nector)
3 Defective pump controller
Circuit diagram related
6
Service current EPC solenoid disconnection
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between C02 (female) (97)
– V30 (female) (1)
Wiring harness between C02 (female) (115),
(117), (120) – V30 (female) (2)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (97) – (115), (117),
ing without turning starting switch ON.
V30 (male)
Between (1) – (2)
ing without turning starting switch ON.
ing without turning starting switch ON.
C02 (female)
(120)
40 Troubleshooting
1
Resistance
7 – 14 z
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resistance
7 – 14 z
PC138US, USLC-8