Failure Code [Dwj0Kb] Merge-Divider Sol. Short Circuit - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02631-02

Failure code [DWJ0KB] Merge-divider Sol. Short Circuit

Action code Failure code
— DWJ0KB
Contents of
• Abnormal current flowed at output to merge-divider solenoid circuit.
trouble
Action of con- • Turns output to merge-divider 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 • Single operation speed of work equipment and swing is high in lifting mode (L).
machine
Related infor- • Operating condition of merge-divider solenoid (ON/OFF) can be checked with monitoring function.
mation (Code 02300: Solenoid 1)
Defective merge-divider
solenoid
1
(Internal short circuit or
ground fault)
Possible causes
Ground fault in wiring har-
and standard
ness
2
value in normal
(Short circuit with GND cir-
state
cuit)
3 Defective pump controller
36
Merge-divider 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)
(112) – V03 (female) (2) and chassis ground
a
Between (112) –
(115), (117), (120)
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
V03 (male)
Between (1) – (2)
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
CP02 Travel lever
At neutral
When either side is
operated
40 Troubleshooting
1
Resistance
20 – 60 z
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Voltage
Max. 1 V
20 – 30 V
PC300, 350-8