Failure Code [Dw45Kb] Swing Brake Sol. S/C - Komatsu Galeo PC800-8 Shop Manual

SEN00792-02

Failure code [DW45KB] Swing Brake Sol. S/C

Action code Failure code
E03 DW45KB
Contents of
• Abnormal current flowed at output to swing brake solenoid circuit.
trouble
Action of • Turns output to swing brake solenoid circuit 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. (The swing holding brake cannot be released).
machine
• Operating condition of swing brake solenoid (ON/OFF) can be checked with monitoring function.
Related (Code 02300: Solenoid 1)
information • If solenoid and wiring harness are normal, operator can swing machine by setting emergency swing
brake release switch to release position (Swing holding brake does not work, however, after machine stops).
Defective swing holding
1 brake solenoid (Internal
short circuit or ground fault)
Ground fault in wiring har-
Possible causes
ness
2
and standard
(Short circuit with GND cir-
value in normal
cuit)
state
3 Defective pump controller
32
Swing Brake Sol. S/C
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.
Between (2) – chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CP03 (female) (37) –
D01 – J04 – S04 – J22 – V05A (female) (2) –
V05B (female) (2) – S25 (female) (14) and
chassis ground
aPrepare with starting switch OFF, then start engine and carry out trou-
bleshooting.
Between (37) –
chassis ground
V05A, V05B (male)
Between (2) – (1)
CP03 Swing lever
All levers in neutral
Work equipment or
swing operated
40 Troubleshooting
Resistance
20 – 60 z
Min. 1 Mz
Resistance Min. 1 Mz
Voltage
Max. 1 V
(5 sec. after setting in
neutral)
20 – 30 V
PC800, 850-8