Failure Code [Dwa2Kb] Service Sol Short - Komatsu PC210-8 Shop Manual

40 Troubleshooting

Failure code [DWA2KB] Service Sol Short

User code Failure code
— DWA2KB
Contents of
• When output to service solenoid is turned ON, short circuit was detected in circuit.
trouble
Action of • Turns output to service solenoid OFF
controller
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on
• Hydraulic circuit for attachment is not does not change to single operation circuit.
machine
• Operating condition of service solenoid can be checked with monitoring function.
Related infor-
(Code: 02301 Solenoid 2)
mation
• Method of reproducing failure code: Turn starting switch ON + Set machine in breaker mode (B).
Defective service solenoid
1 (Internal short circuit or
ground fault)
Possible causes
and standard
Ground fault in wiring har-
value in normal
2 ness (Short circuit with GND
state
circuit)
3 Defective pump controller
Circuit diagram related to service solenoid
PC210, 230, 240-8
Service 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) (86) –
V06 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshooting
Between (86) – chassis ground
Standard value in normal state/Remarks on troubleshooting
without turning starting switch ON.
V06 (male)
Between (1) – (2)
without turning starting switch ON.
without turning starting switch ON.
C02 (female)
UEN00242-01
1
Resistance
20 – 60 z
Min. 1 Mz
Resis-
Min. 1 Mz
tance
Resistance
20 – 60 z
43