Failure Code [Dw91Kb] Travel Neutral Sol Short Circuit - Komatsu PC200-8M0 Shop Manual

SEN06136-00

Failure code [DW91KB] Travel Neutral Sol Short Circuit

Action
Failure code
level
L01 DW91KB
q
Abnormal current flows when pump controller drives travel junction solenoid, so pump controller de-
Detail of failure
termines that short circuit exists in travel junction solenoid circuit.
q
Stops driving travel junction 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.
Problem on
q
Machine does not turn during travel.
machine
q
Controller's command (ON/OFF) to travel junction valve solenoid can be checked with monitoring
Related infor- function. (If controller sends solenoid ON command, monitoring display is ON even if solenoid is not
mation switched ON due to short circuit.) (Code: 02300 Solenoid 1)
q
Method of reproducing failure code: Start engine and turn machine with right and left travel levers.
Cause
Defective travel junction
solenoid
1
(internal short circuit or
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
46
40-304
Travel Neutral Solenoid Short Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector V05, and connect T-adapters to male side.
Between V05 (male) (1) and (2)
Between V05 (male) (1) and ground
1. Turn starting switch to OFF position.
2. Disconnect connector C02 and connect T-adapters to female side.
Between V05 (female) (110) and each of (115), (117)
and (120)
Between C02 (female) (110) and ground
a If no failure is found in checks on cause 2, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors C02 and V05, and connect T-adapter to female side of
either of them.
Between C02 (female) (110) or V05 (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 [DW91KB] Travel Neutral 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