Failure Code [Dw43Kb] Travel Speed Sol Short - Komatsu Galeo PC138US-8 Shop Manual

40 Troubleshooting

Failure code [DW43KB] Travel speed sol short

User code Failure code
— DW43KB
Contents of
• When output to travel speed shifting solenoid was turned ON, short circuit was detected in circuit.
trouble
Action of • Turns output to travel speed shifting solenoid OFF.
controller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
• Speed is low at High travel speed position (Machine monitor is set to High but actual speed is about
appears on
Middle).
machine
• Operating condition of travel speed shifting solenoid can be checked with monitoring function.
Related
(Code: 02300 Solenoid 1)
information
• Method of reproducing failure code: Start engine + Set travel speed to High + Operate travel lever.
Defective travel speed shift-
1 ing solenoid (Internal discon-
nection)
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
Travel speed 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 (2) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between C02 (female) (87)
– V02 (female) (2)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (87) – (115), (117),
Between (87) – chassis ground
ing without turning starting switch ON.
V02 (male)
Between (1) – (2)
ing without turning starting switch ON.
ing without turning starting switch ON.
C02 (female)
(120)
SEN02465-01
1
Resistance
20 – 60 z
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Resistance
20 – 60 z
Min. 1 Mz
31