Failure Code [Dwk0Kb] 2-Stage Relief Sol. S/C - Komatsu Galeo PC800-8 Shop Manual

SEN00792-02

Failure code [DWK0KB] 2-stage Relief Sol. S/C

Action code Failure code
— DWK0KB
Contents of
• Abnormal current flowed at output to 2-stage relief solenoid circuit.
trouble
Action of • Turns output to 2-stage relief solenoid circuit OFF.
controller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Travel power is low (The main relief valve is not set in the HIGH PRESSURE position).
machine
Related • Operating condition of 2-stage relief solenoid (ON/OFF) can be checked with monitoring function.
information (Code 02300: Solenoid 1)
Defective 2-stage relief
solenoid
1
(Internal short circuit or
ground fault)
Possible causes
Ground fault in wiring har-
and standard
ness
value in normal
2
(Short circuit with GND cir-
state
cuit)
3 Defective pump controller
44
2-stage Relief Sol. S/C
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.
Between (2) – chassis ground
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CP03 (female) (17) –
V08 (female) (2) and chassis ground
aPrepare with starting switch OFF, then keep the engine running and
carry out troubleshooting.
Between (17) –
chassis ground
V08 (male)
Between (2) – (1)
CP03 Travel control lever
NEUTRAL
Travel operation
40 Troubleshooting
Resistance
20 – 60 z
Min. 1 Mz
Resistance Min. 1 Mz
Voltage
Max. 1 V
20 – 30 V
PC800, 850-8