Failure Code [Ddnrka] We Lever Lock Sw Open Circuit - Komatsu PC88MR-10 Shop Manual

Failure code [DDNRKA] WE Lever Lock SW Open Circuit

Action level Failure code
L03 DDNRKA
No current flows on the PPC lock lever relay side when the PPC lock lever is in RELEASE
position, so the open circuit is detected.
Details of
No current flows on the controller side when the PPC lock lever is in LOCK position, so
failure
the open circuit is detected.
None in particular (Lock lever automatic lock control may operate wrongly.)
Action of
If cause of failure disappears, machine becomes normal by itself.
controller
Starting motor does not start.
Problem on
All work equipment, swing, and travel are not operated.
machine
Condition of lock lever can be checked with monitoring function.
(Code: 02203)
Related
Method of reproducing failure code: Turn starting switch to ON position and operate work
information
equipment lock lever or release it.
No. Cause
Defective fuse No. 3 in
1
fuse box F01
Defective work
equipment control lever
2
lock switch
(Internal open circuit)
Open circuit in wiring
3
harness
Pump controller is
4
defective.
PC88MR-10
Work Equipment Lever Lock Switch Open Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria, and remarks
If fuse No.3 in fuse box F01 is blown, circuit probably has ground fault.
1. Turn starting switch to OFF position.
2. Disconnect connector S14 and connect T-adapter to female side.
Resistance Between S14 (female) (1) and (2)
1. Turn starting switch to OFF position.
2. Remove fuse No. 3 in fuse box F01.
3. Disconnect connectors CP01 and S14, and connect T-adapters to female
side of CP01 and male side of S14.
Between S14 (male) (79) and F01 3
Between CP01 (female) (79) and S14 (male) (3)
Resistance
Between CP01 (female) (78) and S14 (male) (2)
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-DDNRKA-400-A-Z0-A)
LOCK Min 1 Mz
FREE Max. 1 z
Max. 1 z
Max. 1 z
Max. 1 z
40-293