Failure Code [Dw43Ka] Travel Speed Sol. Disc - Komatsu Galeo PC800-8 Shop Manual

SEN00792-02

Failure code [DW43KA] Travel Speed Sol. Disc.

Action code Failure code
— DW43KA
Contents of
• No current flows travel speed solenoid circuit as power is turned on.
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 • Travel speed does not change to Hi. (The swash plate angle of the travel motor is not minimized)
machine
• The travel speed shifting solenoid is not turned ON when the engine speed is below 1,200 rpm.
• Operation of the travel speed solenoid (ON or OFF) can be checked in the monitoring function.
Related (Code No. 02300: Solenoid 1)
information • 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 [DW43KB].)
Travel Speed Sol. Disc.
1
(Internal disconnection)
Disconnection in wiring har-
ness
2 (Disconnection in wiring or
Possible causes
defective contact in connec-
and standard
tor)
value in normal
state
Hot short (Short circuit with
3 24V circuit) in wiring har-
ness
4 Defective pump controller
26
Travel Speed 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.
Wiring harness between CP03 (female) (27) –
V04 (female) (2)
Wiring harness between V04 (female) (1) –
CP03 (female) (3), (13), (23) – chassis ground
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Wiring harness between CP03 (female) (27) –
V04 (female) (2) and chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Between (27) – chassis ground
V04 (male)
Between (2) – (1)
CP03 (female)
40 Troubleshooting
Resistance
20 – 60 z
Resistance Max. 1 z
Resistance Max. 1 z
Voltage Max. 1 V
Resistance
20 – 60 z
PC800, 850-8