Komatsu Galeo PC800-8 Shop Manual page 766

SEN00793-02
Single-wiper specification
Failure • Windshield wiper and window washer do not
phenomenon work.
Relative
information
Window rear limit switch
fault
1
(Internal disconnection or
short-circuiting)
Windshield wiper motor
2 fault
(Internal disconnection)
Disconnection of wiring
harness
3
(Disconnection or defec-
tive contact with connector)
Possible causes
and standard
value in normal
Grounding fault of wiring
state
harness
4
(Contact with grounding
(GND) circuit)
Defective machine monitor
(Window rear limit switch
system)
5
Defective machine monitor
(Windshield wiper motor
system)
40
Cause Standard value in normalcy and references for troubleshooting
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
W03 (female)
Between (1) – (2)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CM01 (male) (9) –
M05 (female) (3)
Wiring harness between CM01 (male) (10) –
M05 (female) (1)
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Wiring harness between CM02 (female) (15) –
W03 (male) (2) and chassis ground
aTurn the engine starting switch OFF for the preparations, and hold it in
the ON position during the troubleshooting.
(15) – chassis ground
aTurn the engine starting switch OFF for the preparations, and hold it in
the ON position during the troubleshooting.
(9) – chassis ground,
(10) – chassis ground
(3) The windshield wiper does not work.
Front window
When installed at front
When retracted at rear
M05 (female)
Between (3) – (1)
CM02 Front window
When installed at front
Between
When retracted at rear
Windshield wiper
CM01
switch
Between
Between
40 Troubleshooting
Resistance
Min. 1 Mz
Max. 1 z
Continuity and Resistance
Continued
Resis-
tance
Resis-
tance
Resis-
tance
Voltage
20 – 30 V
Max. 1 V
Voltage
OFF Max. 3 V
Max. 3 V
ON
(Constant cycle)
PC800, 850-8
Max. 1 z
Max. 1 z
Min. 1 Mz
20 – 30 V