Failure Code [Dwj0Kb] Merge-Divider Sol Short - Komatsu Galeo PC138US-8 Shop Manual

40 Troubleshooting

Failure code [DWJ0KB] Merge-divider sol short

User code Failure code
— DWJ0KB
Contents of
• When merge-divider EPC solenoid was driven, short circuit was detected in circuit.
trouble
Action of • Turns output to merge-divider 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 • Single operation speed of work equipment and swing is high in lifting mode (L).
machine
Related
• Method of reproducing failure code: Turn starting switch ON.
information
Defective merge-divider EPC
1 solenoid (Internal short cir-
cuit 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
Merge-divider 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 (2) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between C02 (female) (112)
– V05 (female) (2)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (112) – (115), (117),
Between (112) – chassis ground
ing without turning starting switch ON.
V05 (male)
Between (1) – (2)
ing without turning starting switch ON.
ing without turning starting switch ON.
C02 (female)
(120)
SEN02465-01
1
Resistance
7 – 14 z
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Resistance
7 – 14 z
Min. 1 Mz
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