Failure Code [Dw45Ka] Swing Brake Sol Discon - Komatsu PC130-8 Shop Manual

SEN04121-02

Failure code [DW45KA] Swing brake sol discon

User code Failure code
E03 DW45KA
Contents of • When output to swing holding brake solenoid was turned OFF, disconnection was detected in cir-
trouble cuit.
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 • 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: Turn starting switch ON.
Defective swing holding
1 brake solenoid (Internal dis-
connection)
Defective assembled-type
2 diode D01 (Internal discon-
nection)
Defective swing lock switch
3
(Internal disconnection)
Possible causes
and standard
value in normal
state
Disconnection in wiring har-
ness (Disconnection in wiring
4
or defective contact in con-
nector)
5 Defective pump controller
28
Swing holding brake solenoid system 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-
Between (7) – (3)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (3) – (4)
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between CP02 (female)
(101) – D01 (female) (7)
Wiring harness between D01 (female) (3) –
J02 – S04 (female) (3)
Wiring harness between S04 (female) (4) –
V05 (female) (2)
Wiring harness between CP02 (female)
(115), (117), (120) – V05 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshoot-
CP02 (female)
Between (101) –
(115), (117), (120)
ing without turning starting switch ON.
V05 (male)
Between (1) – (2)
ing without turning starting switch ON.
D01 (male) Digital circuit tester
Diode mode
ing without turning starting switch ON.
S04 (male) Swing lock switch
ing without turning starting switch ON.
ing without turning starting switch ON.
Disconnect D01 and
connect pins (3) and
(7) on female side
40 Troubleshooting
Resistance
20 – 60 z
Continuity
There is continuity
Resistance
Max. 1 z
OFF
ON Min. 1 Mz
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resistance
20 – 60 z
directly.
1
Max. 1 z
Max. 1 z
Max. 1 z
Max. 1 z
PC130-8