Failure Code [Da2Lka] Operating Lamp Open Circuit (Pump Con) - Komatsu PC88MR-10 Shop Manual

Failure code [DA2LKA] Operating Lamp Open Circuit (Pump Con)

DA2LKA-400-A-Z0-A)
Action level Failure code
DA2LKA
Pump controller determines that system operating lamp circuit is open because voltage of
output circuit remains at approximately (approx.)5 V or below for approximately (approx.)3
Detail of
seconds after starting switch is turned to ON position, during which pump controller
failure
outputs no current to system operating lamp.
Action of
None in particular
controller
While system operating lamp is lit, battery disconnect switch must not be turned to OFF
Problem on
position. If the battery disconnect switch is turned OFF, the data stored in the pump
machine
controller memory may be destructed.
Method of reproducing failure code: Turn starting switch to ON position.
Although work equipment controller is not able to light up system operating lamp, no
trouble will result unless battery disconnect switch is turned to OFF position.
Related
When controller lights up system operating lamp, output circuit voltage is at low level.
information
Since no controller drives system operating lamp for approximately 3 seconds after
starting switch is turned to ON position, open circuit can be detected.
No. Cause
Defective fuse No. 16 in
1
fuse box F01
Open circuit in wiring
harness
2
(Wire breakage or
defective contact of
connector)
Ground fault in wiring
harness
3
(Contact with ground
circuit)
Pump controller is
4
defective.
PC88MR-10
Operating Lamp Open Circuit (Pump Controller)
Failure
(Pump controller system)
Procedure, measuring location, criteria, and remarks
a If room lamp lights up, this check is not required.
If fuse is blown, circuit probably has ground fault.
1. Turn starting switch to OFF position.
2. Remove fuse No. 16 in fuse box F01.
3. Disconnect connector CP02 and connect T-adapter to female side.
Resistance Between CP02 (female) (100) and F01-16
1. Turn starting switch to OFF position.
2. Remove fuse No. 16 in fuse box F01.
3. Disconnect connectors CM01, CP02, CK01, CE03, and L19. Connect T-
adapter to female side of connector CP02.
Resistance Between CP02 (female) (100) and ground
If no failure is found by above checks, pump controller is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
40 Troubleshooting
Troubleshooting by failure code (Display of code)
(PC88MR-
Max. 1 z
Min. 1 Mz
40-265