Failure Code [Dxe4Kb] Service Current Epc Short - Komatsu PC210-8 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 infor-
(Code: 01700 service EPC solenoid current)
mation
• 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
3 ness (Short circuit with GND
value in normal
circuit)
state
4 Defective pump controller
PC210, 230, 240-8
Service current EPC solenoid short
Trouble
(Pump controller system)
Cause
a Prepare with starting switch OFF, then carry out troubleshooting
Between (1) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshooting
Wiring harness between C02 (female) (97) –
V30 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshooting
Between (97) – (115), (117),
Between (97) – chassis ground
Standard value in normal state/Remarks on troubleshooting
without turning starting switch ON.
V30 (male)
Between (1) – (2)
without turning starting switch ON.
without turning starting switch ON.
C02 (female)
(120)
UEN00243-01
1
Resistance
7 – 14 z
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Resistance
7 – 14 z
Min. 1 Mz
17