Failure Code [Dxe4Kb] Service Current Epc Short - Komatsu Galeo PC138US-8 Shop Manual

40 Troubleshooting

Failure code [DXE4KB] Service current EPC short

User code Failure code
— DXE4KB
Contents of
• When service EPC solenoid was driven, short circuit was detected in circuit.
trouble
Action of • Turns output to service EPC solenoid OFF.
controller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
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 EPC solenoid current)
information
• Method of reproducing failure code: Turn starting switch ON + Set in attachment mode (ATT).
Defective service EPC sole-
1 noid (Internal short circuit or
ground fault)
Possible causes
Ground fault in wiring har-
and standard
2 ness (Short circuit with GND
value in normal
circuit)
state
3 Defective pump controller
Circuit diagram related
PC138US, USLC-8
Service current EPC solenoid short
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (1) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between C02 (female) (97)
– V30 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (97) – (115), (117),
Between (97) – chassis ground
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)
SEN02466-00
1
Resistance
7 – 14 z
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Resistance
7 – 14 z
Min. 1 Mz
7