Failure Code [Dkulka] Ppc Lock Relay Open Circuit - Komatsu PC88MR-10 Shop Manual

Failure code [DKULKA] PPC Lock Relay Open Circuit

Action level Failure code
L03 DKULKA
Open circuit is detected in the circuit when output to PPC lock relay (coil side) is stopped
Details of
(during lock lever automatic lock control operation).
failure
None in particular (Since no current flows, relay is not operated.)
Action of
If cause of failure disappears, machine becomes normal by itself.
controller
All work equipment, swing, and travel are not operated even when lock lever is in FREE
Problem on
position.
machine
Method of reproducing failure code: Turn starting switch ON and release the lock lever
Related
while performing boom RAISE.
information
No. Cause
Defective PPC lock
1
relay
Open circuit in wiring
2
harness
Pump controller is
3
defective.
PC88MR-10
PPC Lock Relay Open Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria, and remarks
1. Turn starting switch to OFF position.
2. Disconnect relay R12, and connect T-adapter to male side.
Resistance Between R12 (male) (1) and (2)
1. Turn starting switch to OFF position.
2. Replace relay R12 with another one.
3. Turn starting switch to ON position.
If this failure code disappears, original PPC lock relay is defective.
1. Turn starting switch to OFF position.
2. Disconnect connector CP02 and relay R12, and connect T-adapter to
female side.
Between CP02 (female) (99) and R12 (female) (1)
Resistance
Between R12 (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.)
40 Troubleshooting
Troubleshooting by failure code (Display of code)
(PC88MR-DKULKA-400-A-Z0-A)
300 to 600
z
Max. 1 z
Max. 1 z
40-325