Failure Code [Dw45Kb] Swing Brake Sol Short - Komatsu Galeo PC138US-8 Shop Manual

SEN02465-01

Failure code [DW45KB] Swing brake sol short

User code Failure code
E03 DW45KB
Contents of
• When output to swing holding brake solenoid was turned ON, short circuit was detected in circuit.
trouble
Action of • Turns output to swing holding brake solenoid OFF.
controller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Machine cannot swing (Swing holding brake is not reset).
machine
• If solenoid and wiring harness are normal, operator can swing machine by setting swing holding
brake release switch in release position (Swing holding brake does not work, however, when
machine stops).
Related • Keep swing lock switch in OFF position and swing holding brake release switch in release position
information during troubleshooting.
• Operating condition of swing holding brake solenoid can be checked with monitoring function.
(Code: 02300 Solenoid 1)
• Method of reproducing failure code: Start engine + Swing with left work equipment control lever.
Defective swing holding
1 brake solenoid (Internal short
circuit or ground fault)
Ground fault in wiring har-
Possible causes
ness (Disconnection in wiring
and standard
2
or defective contact in con-
value in normal
nector)
state
3 Defective pump controller
34
Swing holding brake solenoid system 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) (101)
– D01 – J04 – S04 – V03 (female) (2), – S25
(female) (14)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (101) –
(115), (117), (120)
Between (101) –
chassis ground
ing without turning starting switch ON.
V03 (male)
Between (1) – (2)
ing without turning starting switch ON.
ing without turning starting switch ON.
C02 (female)
Disconnect D01 and
connect pins (3) and
(7) on female side
40 Troubleshooting
Resistance
20 – 60 z
Min. 1 Mz
Resis-
tance
Resistance
20 – 60 z
directly.
Min. 1 Mz
PC138US, USLC-8
1
Min. 1 Mz