Komatsu PC130-8 User Manual

SEN04123-01 40 Troubleshooting
36 PC130-8
E-19 Windshield wiper and window washer do not operate 1
Trouble (1) When wiper switch is operated, wiper monitor does not light up or go off.
Related
information
• Condition of wiper switch signal can be checked with monitoring function.
(Code: 04504 Monitor 1st, 2nd line switches)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1 Defective machine monitor
Machine monitor may be defective. (Since trouble is in system,
troubleshooting cannot be carried out.)
Trouble (2) When wiper switch is operated, wiper does not operate.
Related
information
• Condition of window rear limit switch signal can be checked with monitoring function.
(Code: 02204 Switch input 5)
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective window rear limit
switch (Internal short circuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
W03 (male) Front window Resistance
Between (1) – (2)
When installed to
front
Min. 1 Mz
When retracted to
rear
Max. 1 z
2
Defective wiper motor (Inter-
nal disconnection)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
M05 (female) Continuity
Between (1) – (3) There is continuity
3
Disconnection in wiring har-
ness (Disconnection in wiring
or defective contact in con-
nector)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CP02 (female)
(119) – M05 (male) (3)
Resis-
tance
Max. 1 z
Wiring harness between CP02 (female)
(114) – M05 (male) (1)
Resis-
tance
Max. 1 z
4
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP01 (female) (57) – W03 (female) (1) and
chassis ground
Resis-
tance
Min. 1 Mz
5
Defective pump controller
(Rear limit switch system)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP01 (female) Front window Resistance
Between (57) –
chassis ground
When installed to
front
Min. 1 Mz
When retracted to
rear
Max. 1 z
Defective pump controller
(Wiper motor system)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP02 (female) Continuity
Between (119) – (114) There is continuity

Komatsu PC130-8 Specifications

General

Brand	Komatsu
Model	PC130-8
Category	Excavators
Language	English