Failure Code [Dw45Ka] Swing Brake Sol. Disc - Komatsu Galeo PC800-8 Shop Manual

SEN00792-02

Failure code [DW45KA] Swing Brake Sol. Disc.

Action code Failure code
E03 DW45KA
Contents of
• No current flows at output to swing brake solenoid circuit.
trouble
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 (The swing holding brake cannot be released).
machine
• Operating condition of swing brake solenoid (ON/OFF) can be checked with monitoring function.
(Code 02300: Solenoid 1)
• If solenoid and wiring harness are normal, operator can swing machine by setting emergency swing brake
release switch in release position (Swing holding brake does not work, however, when machine stops).
Related
• Keep the swing lock switch in the OFF position and the swing holding brake release switch in the
information
RELEASE position during troubleshooting.
• Since the controller detects disconnection while the solenoid output is turned ON, be sure to turn the
solenoid output ON when checking the solenoid again after repairing it. (For how to turn power ON or
OFF, refer to the troubleshooting under failure code [DW45KB].)
Defective swing holding
1 brake solenoid (Internal dis-
connection)
Defective assembled-type
2 diode D01
(Internal disconnection)
Defective swing lock switch
3
(Internal disconnection)
Possible causes
and standard
value in normal
Disconnection in wiring har-
state
ness
4 (Disconnection in wiring or
defective contact in connec-
tor)
Hot short (Short circuit with
5 24V circuit) in wiring har-
ness
6 Defective pump controller
30
Swing Brake Sol. Disc.
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
D01 (male)
Between (7) – (3)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
S04 (female)
Between (3) – (4)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CP03 (female) (37) –
D01 (female) (7)
Wiring harness between D01 (female) (3) – J04 –
S04 (male) (3)
Wiring harness between S04 (female) (4) – J22 –
V05A (female) (2) – V05B (female) (2)
Wiring harness between V05A (female) (1) –
V05B (female) (1) – J28 – CP03 (female) (3),
(13), (23)
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Wiring harness between CP03 (female) (37) –
D01 – female (7) and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
CP03 (female)
Between (37) –
chassis ground
V05A, V05B (male)
Between (2) – (1)
Digital circuit tester
Diode mode
Switch
OFF
LOCK (ON)
Disconnect D01 and
connect pins (3) and
(7) on female side
directly.
40 Troubleshooting
Resistance
20 – 60 z
Continuity
There is continuity
Resistance
Max. 1 z
Min. 1 Mz
Resistance Max. 1 z
Resistance Max. 1 z
Resistance Max. 1 z
Resistance Max. 1 z
Voltage Max. 1 V
Resistance
20 – 60 z
PC800, 850-8