Failure Code [Dy20Ma] Wiper Parking Abnormality - Komatsu Galeo PC138US-8 Shop Manual

SEN02466-00

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
(Code: 02204 Switch input 5)
information
• 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
and standard
value in normal
state
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
nector)
3 Defective pump controller
10
Wiper parking abnormality
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (4) – (5)
Between (1) – (3)
Wiring harness between C02 (female) (114)
– M05 (male) (1)
Wiring harness between C02 (female) (119)
– M05 (male) (3)
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between C01 (female) (75)
– M05 (male) (4)
Wiring harness between M05 (female) (5) –
J01 – chassis ground (T09)
Wiring harness between C02 (female) (114)
– M05 (male) (1)
Wiring harness between C02 (female) (119)
– M05 (male) (3)
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (75) – chas-
Between (114) – (119)
ing without turning starting switch ON.
M05 (female) Wiper blade
Storage area
Working area
ing without turning starting switch ON.
ing without turning starting switch ON.
C01 (female) Wiper blade
Storage area
sis ground
Working area
40 Troubleshooting
Resistance
Max. 1 z
Min. 1 Mz
Max. 20 z
All range
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Resistance
Max. 1 z
Min. 1 Mz
Max. 20 z
All range
PC138US, USLC-8
1
Max. 1 z
Max. 1 z
Max. 1 z
Max. 1 z
Max. 1 z
Max. 1 z