Failure Code [Dwk0Kb] 2-Stage Relief Sol Short - Komatsu PC210-8 Shop Manual

UEN00242-01

Failure code [DWK0KB] 2-stage Relief Sol Short

User code Failure code
— DWK0KB
Contents of
• When output to 2-stage relief solenoid is turned ON, short circuit was detected in circuit.
trouble
Action of • Turns output to 2-stage relief solenoid OFF.
controller
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
• Power maximizing function does not work.
appears on
• Travel power is low.
machine
• Operating condition of 2-stage relief solenoid can be checked with monitoring function.
Related infor-
(Code: 02300 Solenoid 1)
mation
• Method of reproducing failure code: Turn starting switch ON + Set machine in working mode (L).
Defective 2-stage relief sole-
1 noid (Internal short circuit or
ground fault)
Possible causes
Ground fault in wiring har-
and standard
2 ness (Short circuit with GND
value in normal
circuit)
state
3 Defective pump controller
46
2-stage relief solenoid short
Trouble
(Pump controller system)
Cause
a Prepare with starting switch OFF, then carry out troubleshooting
Between (1) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshooting
Wiring harness between C02 (female) (109)
– V02 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshooting
Between (109) – (115), (117),
Between (109) – chassis ground
Standard value in normal state/Remarks on troubleshooting
without turning starting switch ON.
V02 (male)
Between (1) – (2)
without turning starting switch ON.
without turning starting switch ON.
C02 (female)
(120)
40 Troubleshooting
1
Resistance
20 – 60 z
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Resistance
20 – 60 z
Min. 1 Mz
PC210, 230, 240-8