Komatsu Galeo PC800-8 Shop Manual page 764

SEN00793-02
Double-wiper specification
Failure • Windshield wiper and window washer do not
phenomenon work
Relative
information
Defective lower wiper
1 switch
(Internal disconnection)
Defective lower wiper
2 motor
(Internal disconnection)
Possible causes Disconnection of wiring
and standard harness
3
value in normal (Disconnection or defec-
state tive contact with connector)
Defective machine monitor
(Lower wiper switch
system)
4
Defective machine monitor
(Lower wiper motor
system)
Note: When the upper wiper and lower wiper are operated simultaneously: Max. 3 V
intervals)
38
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.
S08 (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 CM02 (female) (15) –
S08 (male) (1)
Wiring harness between S08 (male) (2) – J05 –
J30 – J14 – chassis ground
Wiring harness between CM01 (female) (10) –
J02 – M15 (male) (3)
Wiring harness between M15 (male) (1) – J05 –
J30 – J14 – 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.
(10) – chassis ground
(2) Lower windshield wiper does not operate.
Lower wiper switch
M15 (female)
Between (3) – (1)
CM02 Lower wiper switch
Between
CM01 Lower wiper switch
Between
40 Troubleshooting
Resistance
OFF Min. 1 Mz
Max. 1 z
ON
Continuity and resistance
Continued
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Voltage
OFF 20 – 30 V
ON Max. 1 V
Voltage
OFF Max. 3 V
ON 20 – 30 V (Note)
20 – 30 V (at regular
PC800, 850-8
Max. 1 z
Max. 1 z
Max. 1 z
Max. 1 z