Failure Code [Dw91Ka] Travel Neutral Sol Open Circuit - Komatsu PC200-8M0 Shop Manual

SEN06136-00

Failure code [DW91KA] Travel Neutral Sol Open Circuit

Action
Failure code
level
L01 DW91KA
q
Controller output voltage to solenoid is above standard value when pump controller does not drive
Detail of failure travel junction solenoid, so pump controller determines that open circuit exists in travel junction so-
lenoid 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.
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
mation not switched ON due to open 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 open circuit)
Open or short circuit in wiring har-
2
ness
Open circuit in wiring harness
3 (wire breakage or defective con-
tact of connector)
4 Defective pump controller
44
40-304
Failure code [DW91KA] Travel Neutral Sol Open Circuit
Travel Neutral Solenoid Open 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)
1. Turn starting switch to OFF position.
2. Disconnect connector C02 and connect T-adapters to female side.
Between C02 (female) (110) and each of (115),
(117) and (120)
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-adapters to each
female side.
Between C02 (female) (110) and V05 (female) (1)
Between V05 (female) (2) and C02 (female) (115)
or (117) or (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