Failure Code [Dwk0Kb] 2-Stage Relief Sol Short - Komatsu PC130-8 Shop Manual

SEN04121-02

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
(Code: 02300 Solenoid 1)
information
• 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
42
2-stage relief solenoid short
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (2) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between CP02 (female)
(109) – V06 (female) (2) and chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (109) – (115), (117),
Between (109) – chassis ground
ing without turning starting switch ON.
V06 (male)
Between (1) – (2)
ing without turning starting switch ON.
ing without turning starting switch ON.
CP02 (female)
(120)
40 Troubleshooting
1
Resistance
20 – 60 z
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Resistance
20 – 60 z
Min. 1 Mz
PC130-8