Failure Code [Dxe0Kb] Ls-Epc Sol. Short Circuit - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02631-02

Failure code [DXE0KB] LS-EPC Sol. Short Circuit

Action code Failure code
— DXE0KB
Contents of
• Abnormal current flowed to LS-EPC solenoid circuit.
trouble
Action of con- • Sets output to LS-EPC solenoid circuit to 0.
troller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
• Travel speed Mi or Lo is high.
appears on
• Work equipment speed and swing speed are high in lifting mode (L).
machine
Related infor- • Output to LS-EPC solenoid (current value) can be checked with monitoring function.
mation (Code 01500: LS-EPC solenoid current)
Defective LS-EPC solenoid
1 (Internal short circuit or
ground fault)
Possible causes
and standard
Hot short (Short circuit with
3
value in normal
24V circuit) in wiring harness
state
3 Defective pump controller
48
LS-EPC solenoid short circuit
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a
Between (1) – chassis ground
a
Wiring harness between CP02 (female) (88)
– V19 (female) (1) and chassis ground
a
Between (88) – chassis ground
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
V19 (male)
Between (1) – (2)
Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP02 (female)
Between (88) –
(115), (117), (120)
40 Troubleshooting
1
Resistance
7 – 14 z
Min. 1 Mz
Voltage Max. 1 V
Resistance
7 – 14 z
Min. 1 Mz
PC300, 350-8