Komatsu PC130-7, Shop Manual

Page: 164 / 342

20-316
PC130-7
TROUBLESHOOTING
Error code [114] (Short circuit in windshield washer drive system)
User code Error code
Trouble
Short circuit in windshield washer drive system
(Monitor panel system)
– 114
Contents of
trouble
• When the windshield washer drive circuit is connected to the ground circuit (the output is turned ON),
an abnormal current flows.
Action of
monitor panel
• Turns the ground output of the windshield washer motor circuit OFF.
Problem that
appears on
machine
• The windshield washer stops.
Related
information
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective washer motor
(Internal short circuit)
a
Prepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
A50 (male) Resistance
Between (1) and (2) 5 – 20
z
2
Short circuit with power
source in wiring harness
(Contact with 24-V circuit)
a
Prepare with starting switch OFF, then turn starting switch ON and car-
ry out troubleshooting.
Between P01 (female) (3) – A50 (female) (2) or
D02 (female) (8) wiring harness and chassis
ground
Voltage Max. 1 V
3 Defective monitor panel
a
Prepare with starting switch OFF, then turn starting switch ON and car-
ry out troubleshooting.
P01
Windshield washer
switch
Voltage
Between (3) and
chassis ground
OFF 20 – 30 V
ON Max. 1 V
[114]
(1)