Failure Code [Dw43Kb] Travel Speed Sol Short Circuit - Komatsu PC200-8M0 Shop Manual

SEN06136-00

Failure code [DW43KB] Travel Speed Sol Short Circuit

Action
Failure code
level
L01 DW43KB
q
Abnormal current flows when pump controller drives travel speed selector solenoid, so pump con-
Detail of failure
troller determines that short circuit exists in travel speed selector solenoid circuit.
q
Stops driving travel speed selector solenoid.
Action of con-
q
Even if cause of failure disappears, machine does not become normal until starting switch is turned
troller
to OFF position.
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
Related infor-
function. (Code: 02300 Solenoid 1)
mation
q
Method of reproducing failure code: Start engine, set travel speed to High and operate travel lever.
Cause
Defective travel speed
1 selector solenoid (Internal
short circuit, ground fault)
Short circuit or ground fault
2
in wiring harness
Ground fault in wiring har-
3 ness
(contact with ground circuit)
4 Defective pump controller
38
40-304
Travel Speed Solenoid Short 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)
Between V04 (male) (1) and ground
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)
Between C02 (female) (87) and ground
a If no abnormality is found in check on cause 2, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors C02 and V04, and connect T-adapters to either female
side.
Between C02 (female) (87) or V04 (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.)
304 Troubleshooting by failure code, Part 4
Failure code [DW43KB] Travel Speed Sol Short Circuit
PC200, 200LC, 220, 220LC-8M0
20 to 60 z
Resistance
Resistance Min. 1 Mz
20 to 60 z
Resistance
Resistance Min. 1 Mz
Resistance Min. 1 Mz