Failure Code [Dw43Ka] Travel Speed Sol Open Circuit - Komatsu PC200-8M0 Shop Manual

SEN06136-00

Failure code [DW43KA] Travel Speed Sol Open Circuit

Action
Failure code
level
L01 DW43KA
q
No current flows when pump controller drives travel speed selector solenoid, so pump controller
Detail of failure
determines that open circuit exists in travel speed selector solenoid circuit.
q
Action of con- None in particular (Since no current flows, solenoid is not energized.)
q
troller If cause of failure disappears, machine becomes normal by itself.
q
Problem on "Hi" travel speed is slow. (Although "Hi" is diaplayed on machine monitor, actual travel speed is still
machine "Mi".)
q
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 "ON", sensor status displayed on moni-
Related infor-
toring screen is "ON" even if solenoid is not energized due to short circuit.)
mation
(Code: 02300 Solenoid 1)
q
Method of reproducing failure code: Start engine, set travel speed to High and operate travel lever.
Cause
Defective travel speed selector
1
solenoid (Internal open circuit)
Open circuit in wiring harness
2 (wire breakage or defective con-
tact of connector)
3 Defective pump controller
36
40-304
Failure code [DW43KA] Travel Speed Sol Open Circuit
Travel Speed Solenoid Open Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector V04, and connect T-adapters to male side.
Between V04 (male) (1) and (2)
1. Turn starting switch to OFF position.
2. Disconnect connector C02 and connect T-adapters to female side.
Between C02 (female) (87) and each of (115) ,
(117) and (120)
a If no failure is found by above checks , this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors C02 and V04, and connect T-adapters to each
female side.
Between C02 (female) (87) and V04 (female) (1)
Between V04 (female) (2) and each of C02 (female)
(115), (117) and (120)
If no failure is found by above checks, pump controller is defective. (Since this
is an internal defect, troubleshooting cannot be performed.)
304 Troubleshooting by failure code, Part 4
Resistance 20 to 60 z
Resistance 20 to 60 z
Resistance
Resistance
PC200, 200LC, 220, 220LC-8M0
Max. 1 z
Max. 1 z