Failure Code [Dwa2Kb] Attachment Sol Short Circuit - Komatsu PC200-8M0 Shop Manual

SEN06137-00

Failure code [DWA2KB] Attachment Sol Short Circuit

Action
Failure code
level
L03 DWA2KB
q
Abnormal current flows when pump controller drives attachment return selector solenoid, so pump
Detail of failure
controller determines that short circuit exists in attachment return selector solenoid circuit.
q
Stops driving attachment return selector solenoid.
Action of con-
q Even if cause of failure disappears, machine does not become normal until starting switch is turned
troller
to OFF position.
Problem on
q
Attachment return circuit does not change to 1-way circuit.
machine
q
Controller's command (ON/OFF) to attachment return selector solenoid can be checked with mon-
itoring function. (If controller sends solenoid ON command, monitoring display is ON even if sole-
Related infor-
noid is not switched ON due to short circuit.) (Code: 02301 Solenoid 2)
mation
q
Method of reproducing failure code: Turn starting switch to ON position and set machine in breaker
mode (B).
Cause
Defective attachment return selec-
1 tor solenoid (internal short circuit
or ground fault)
Open circuit or ground fault in wir-
2
ing harness
Ground fault in wiring harness
3
(contact with ground circuit)
4 Defective pump controller
6
40-305
Attachment single/multiple selector Solenoid Short Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector V06, and connect T-adapters to male side.
Between V06 (male) (1) and (2)
Between V06 (male) (1) and ground
1. Turn starting switch to OFF position.
2. Disconnect connector C02 and connect T-adapters to female side.
Between C02 (female) (86) and ground
a If no failure is found in checks on cause 2, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors C02 and V06, and connect T-adapters to either
female side.
Between C02 (female) (86) or V06 (female) (1) and
ground
If no failure is found by above checks, pump controller is defective. (Since this
is an internal defect, troubleshooting cannot be performed.)
305 Troubleshooting by failure code, Part 5
Failure code [DWA2KB] Attachment Sol Short Circuit
PC200, 200LC, 220, 220LC-8M0
Resistance 20 to 60 z
Resistance Min. 1 Mz
Resistance 20 to 60 z
Resistance Min. 1 Mz