Failure Code [Ddnrky] We Lever Lock Sw Short Circuit - Komatsu PC88MR-10 Shop Manual

Failure code [DDNRKY] WE Lever Lock SW Short Circuit

Action level Failure code
L03 DDNRKY
Signal voltage of circuit on controller side is 5.2 V or higher when PPC lock lever is in
RELEASE position.
Details of
Signal voltage of circuit on PPC lock lever relay side is 5.2 V or higher when PPC lock
failure
lever is in LOCK position.
Stops PPC lock relay output.
Action of
If cause of failure disappears, machine becomes normal by itself.
controller
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 work
equipment lock lever
1
switch
(internal short circuit)
Hot short circuit in
2
wiring harness
Pump controller is
3
defective.
PC88MR-10
Work Equipment Lever Lock Switch Short Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
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. Disconnect connector S14, and connect T-adapter to male side.
3. Turn starting switch to ON position.
Between S14 (male) (2) and ground
Voltage
Between S14 (male) (3) 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-DDNRKY-400-A-Z0-A)
LOCK Min 1 Mz
FREE Max. 1 z
Max. 1 V
Max. 1 V
40-295