Failure Code [Dw43Ky] Travel Speed Sol Hot Short Circuit - Komatsu PC88MR-10 Shop Manual

Failure code [DW43KY] Travel Speed Sol Hot Short Circuit

A)
Action level Failure code
L01 DW43KY
When controller does not drive travel speed selector solenoid, output terminal voltage of
Detail of
controller is higher than specified value, and hot short circuit is detected.
failure
None in particular.
Action of
If cause of failure disappears, machine becomes normal by itself.
controller
Machine travels fast in "Lo" travel speed setting. (Although "Lo" is displayed on machine
Problem on
monitor, actual travel speed is still "Hi".)
machine
Controller's command (ON/OFF) to travel speed selector solenoid can be checked with
monitoring function. (As long as controller's command to solenoid is "OFF", sensor status
displayed on monitoring screen is "OFF" even if solenoid is not energized due to short
Related
circuit.)
information
(Code: 02300)
Method of reproducing failure code: Turn starting switch to ON position.
No. Cause
Hot short circuit in
1
wiring harness
Pump controller is
2
defective.
Circuit diagram related to travel speed solenoid
PC88MR-10
Travel Speed Solenoid Hot Short Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria, and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector V02 and connect T-adapter to female side.
3. Turn starting switch to ON position.
Voltage Between V02 (female) (1) 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-DW43KY-400-A-Z0-
Max. 4.5 V
40-337