Failure Code [Dw43Ka] Travel Speed Sol Discon - Komatsu Galeo PC138US-8 Shop Manual

SEN02465-01

Failure code [DW43KA] Travel speed sol discon

User code Failure code
— DW43KA
Contents of
• When output to travel speed shifting solenoid was turned ON, disconnection was detected in 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
• 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
Disconnection in wiring har-
and standard
ness (Disconnection in wiring
2
value in normal
or defective contact in con-
state
nector)
3 Defective pump controller
Circuit diagram related
30
Travel speed 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-
Wiring harness between C02 (female) (87)
– V02 (female) (2)
Wiring harness between C02 (female) (115),
(117), (120) – V02 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (87) – (115), (117),
ing without turning starting switch ON.
V02 (male)
Between (1) – (2)
ing without turning starting switch ON.
ing without turning starting switch ON.
C01 (female)
(120)
40 Troubleshooting
1
Resistance
20 – 60 z
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resistance
20 – 60 z
PC138US, USLC-8