Failure Code [Dw43Kb] Travel Speed Sol. Short Circuit - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02631-02

Failure code [DW43KB] Travel Speed Sol. Short Circuit

Action code Failure code
— DW43KB
Contents of
• Abnormal current flowed at output to travel speed solenoid circuit.
trouble
Action of con- • Turns output to travel speed solenoid circuit OFF.
troller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Travel speed does not change to Hi. (Machine monitor changes to the normal state.)
machine
Related infor- • Operating condition of travel speed solenoid (ON/OFF) can be checked with monitoring function.
mation (Code 02300: Solenoid 1)
Defective travel speed sole-
1 noid (Internal short circuit or
ground fault)
Possible causes
and standard
Hot short (Short circuit with
value in normal
2
24V circuit) in wiring harness
state
3 Defective pump controller
20
Travel speed solenoid short circuit
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a
Between (2) – chassis ground
a
Wiring harness between CP02 (female) (87)
– V04 (female) (2) and chassis ground
a
Between (87) – chas-
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
V04 (male)
Between (1) – (2)
Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
CP02 Travel speed
sis ground
Hi + Travel operation
40 Troubleshooting
Resistance
20 – 60 z
Min. 1 Mz
Voltage Max. 1 V
Voltage
Lo Max. 1 V
20 – 30 V
PC300, 350-8
1