Windshield Wiper And Window Washer Do Not Operate - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02632-02
E-16 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, trou-
bleshooting cannot be carried out.)
Cause Standard value in normal state/Remarks on troubleshooting
a
Between (1) – (2)
a
a
Wiring harness between CP02 (female)
(119) – M05 (male) (3)
Wiring harness between CP02 (female)
(114) – M05 (male) (1)
a
CP01 (female) (57) – W03 (male) (1)
a
CP01 (female)
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
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
M05 (female)
Between (1) – (3)
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Front window
When installed to
When retracted to
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP02 (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
PC300, 350-8
1
Max. 1 z
Max. 1 z
Min. 1 Mz