Failure Code [Dy20Ma] Wiper Parking Abnormality - Komatsu PC210-8 Shop Manual

40 Troubleshooting

Failure code [DY20MA] Wiper Parking Abnormality

User code Failure code
— DY20MA
Contents of
• When windshield wiper parks, P signal of storage area is not input.
trouble
Action of • Turns parking output to wiper motor OFF.
controller
• If cause of failure disappears, system resets itself.
Problem that
appears on
• Wiper motor does not park.
machine
• Condition of P contact signal of wiper parking area can be checked with monitoring function.
Related infor-
(Code: 02204 switch 5)
mation
• Method of reproducing failure code: Turn starting switch ON + Set wiper switch to INT/ON to OFF.
Defective wiper motor (Inter-
1
nal disconnection)
Possible causes
Disconnection in wiring har-
and standard
ness (Disconnection in wiring
value in normal
3
or defective contact in con-
state
nector)
4 Defective pump controller
PC210, 230, 240-8
Wiper parking abnormality
Trouble
(Pump controller system)
Cause
a Prepare with starting switch OFF, then carry out troubleshooting
Between (4) – (5)
a Prepare with starting switch OFF, then carry out troubleshooting
Wiring harness between C01 (female) (75) –
M05 (male) (4)
Wiring harness between M05 (female) (5) –
J04 – chassis ground (T05, T06)
a Prepare with starting switch OFF, then carry out troubleshooting
Between (75) – chas-
Standard value in normal state/Remarks on troubleshooting
without turning starting switch ON.
M05 (female) Wiper blade
Storage area
Working area
without turning starting switch ON.
without turning starting switch ON.
C01 (female) Wiper blade
Storage area
sis ground
Working area
UEN00243-01
1
Resistance
Max. 1 z
Min. 1 Mz
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resistance
Max. 1 z
Min. 1 Mz
29