Failure Code [Dw91Kb] Travel Junction Sol. Short Circuit - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02631-02

Failure code [DW91KB] Travel Junction Sol. Short Circuit

Action code Failure code
— DW91KB
Contents of
• Abnormal current flowed at output to travel junction solenoid circuit.
trouble
Action of con- • Turns output to travel junction solenoid OFF.
troller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Hard to turn when operating travel steering.
machine
Related infor- • Operating condition of travel junction solenoid (ON/OFF) can be checked with monitoring function.
mation Code 02300: Solenoid 1)
Defective travel junction
solenoid
1
(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
30
Travel junction 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)
(110) – V02 (female) (2) and chassis ground
a
Between (110) –
(115), (117), (120)
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
V02 (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 lever
At straight-travel
At steering
40 Troubleshooting
1
Resistance
20 – 60 z
Min. 1 Mz
Voltage Max. 1 V
Voltage
Max. 1 V
20 – 30 V
PC300, 350-8