Failure Code [Dwa2Ka] Attachment Sol Open Circuit - Komatsu PC200-8M0 Shop Manual

SEN06137-00

Failure code [DWA2KA] Attachment Sol Open Circuit

Action
Failure code
level
L03 DWA2KA
q
Controller output voltage to ATT return selector solenoid exceeds standard value when it stops out-
Detail of failure
putting drive current to ATT return selector solenoid.
q
Action of con- None in particular (Since no current flows, solenoid is not energized.)
q
troller If cause of failure disappears, machine becomes normal by itself.
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 open circuit.) (Code: 02301 Solenoid 2)
mation
q
Method of reproducing failure code: Turn starting switch to ON position and set machine in working
mode other than breaker mode (B).
Cause
Defective attachment return selec-
1
tor solenoid (internal open circuit)
Open circuit or ground fault in wir-
2
ing harness
Open circuit in wiring harness
3 (wire breakage or defective con-
tact of connector)
4 Defective pump controller
4
40-305
Attachment Single/multiple selector Solenoid Open 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)
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 each
female side.
Between C02 (female) (86) and V06 (female) (1)
Between V06 (female) (2) 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 [DWA2KA] Attachment Sol Open Circuit
PC200, 200LC, 220, 220LC-8M0
Resistance 20 to 60 z
Resistance 20 to 60 z
Max. 1 z
Resistance
Max. 1 z
Resistance