Windshield Wiper And Window Washer Do Not Operate - Komatsu Galeo PC138US-8 Shop Manual

SEN02467-00
E-19 Windshield wiper and window washer do not operate
Trouble (1) When wiper switch is operated, wiper monitor does not light up or go off.
Related • Condition of wiper switch signal can be checked with monitoring function.
information (Code: 04504 Monitor 1st, 2nd line switches)
Possible causes
and standard
value in normal
1 Defective machine monitor
state
Trouble (2) When wiper switch is operated, wiper does not operate.
Related • Condition of window rear limit switch signal can be checked with monitoring function.
information (Code: 02204 Switch input 5)
Defective window rear limit
1
switch (Internal short circuit)
Defective wiper motor (Inter-
2
nal disconnection)
Disconnection in wiring har-
ness (Disconnection in wiring
3
Possible causes
or defective contact in con-
and standard
nector)
value in normal
state
Ground fault in wiring har-
4 ness (Short circuit with GND
circuit)
Defective pump controller
(Rear limit switch system)
5
Defective pump controller
(Wiper motor system)
32
Cause Standard value in normal state/Remarks on troubleshooting
Machine monitor may be defective. (Since trouble is in system,
troubleshooting cannot be carried out.)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (1) – (2)
a Prepare with starting switch OFF, then carry out troubleshoot-
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between C02 (female) (119)
– M05 (male) (3)
Wiring harness between C02 (female) (114)
– M05 (male) (1)
a Prepare with starting switch OFF, then carry out troubleshoot-
C01 (female) (57) – W03 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (57) –
chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
W03 (male) Front window
When installed to
When retracted to
ing without turning starting switch ON.
M05 (female)
Between (1) – (3)
ing without turning starting switch ON.
ing without turning starting switch ON.
ing without turning starting switch ON.
C01 (female) Front window
When installed to
When retracted to
ing without turning starting switch ON.
C02 (female)
Between (119) – (114)
40 Troubleshooting
Resistance
Min. 1 Mz
front
Max. 1 z
rear
Continuity
There is continuity
Resis-
tance
Resis-
tance
Resis-
tance
Resistance
Min. 1 Mz
front
Max. 1 z
rear
Continuity
There is continuity
PC138US, USLC-8
1
Max. 1 z
Max. 1 z
Min. 1 Mz