Windshield Wiper And Window Washer Do Not Operate - Komatsu PC200-8M0 Shop Manual

SEN06138-00
E-25 Windshield wiper and window washer do not operate
Failure 1) When wiper switch is operated, wiper monitor does not light up or go off.
q
Related informa- Signal of wiper switch can be checked with monitoring function.
tion (Code: 04504 Monitor 1st, 2nd line switches)
Cause
1 Defective machine monitor
Failure 2) When wiper switch is operated, windshield wiper does not operate.
q
Signal of window rear limit switch can be checked with monitoring function.
Related informa- (Code: 02204 Switch input 5)
q
tion Wiper motor is checked and its failure is expressed in failure code [DY20KA], [DY20MA],
[DY2DKB], or [DY2EKB].
Cause
Defective window rear limit
1
switch (Internal short circuit)
Defective wiper motor
2
(Internal open circuit)
Open circuit in wiring har-
ness
3
(wire breakage or defective
contact of connector)
Ground fault in wiring har-
4 ness
(contact with ground circuit)
5 Defective pump controller
Failure 3) When window washer switch is operated, window washer does not operate.
q
Signal of window washer switch can be checked with monitoring function.
Related informa-
(Code: 04504 Monitor 1st, 2nd line switches)
tion
q
Window washer is checked and its failure is expressed in failure codes [DY2CKA] or [DY2CKB].
Cause
1 Defective machine monitor
48
40-400
Procedure, measuring location, criteria and remarks
Machine monitor may be defective. (Since this is an internal defect, troubleshooting
cannot be performed.)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector W03.
Between W03 (male) (1)
and (2)
1. Turn starting switch to OFF position.
2. Disconnect connector M05 and connect T-adapters to female side.
Between M05 (female) (1) and (3)
a Wiper motor system
See troubleshooting for failure codes [DY20KA], [DY20MA], [DY2DKB], and
[DY2EKB].
a Wiper rear limit switch system
1. Turn starting switch to OFF position.
2. Disconnect connector C01 and connect T-adapters to female side.
3. Pull up front window.
Between C01 (female) (57) and ground
1. Turn starting switch to OFF position.
2. Disconnect connector C01 and connect T-adapters to female side.
3. Set front window in position.
Between C01 (female) (57) and ground
If no failure is found by above checks, the pump controller is defective. (Since this is
an internal defect, troubleshooting cannot be performed.)
Procedure, measuring location, criteria and remarks
Machine monitor may be defective. (Since this is an internal defect, troubleshooting
cannot be performed.)
400 Troubleshooting of electrical system (E-mode)
E-25 Windshield wiper and window washer do not operate
Front window: when set in
position
Front window: when pulled
up
PC200, 200LC, 220, 220LC-8M0
Resistance Min. 1 Mz
Max. 1 z
Resistance
Continuity
Max. 1 z
Resistance
Resistance Min. 1 Mz