Failure Code [Dy20Ma] Wiper Parking Abnormality - Komatsu PC130-8 Shop Manual

SEN04122-01

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
Disconnection in wiring har-
and standard
ness (Disconnection in wiring
value in normal
2
or defective contact in con-
state
nector)
3 Defective pump controller
12
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-
ing without turning starting switch ON.
M05 (female)
Between (4) – (5)
Between (1) – (3)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CP01 (female) (75)
– M05 (male) (4)
Wiring harness between M05 (male) (5) –
J04 – chassis ground (T05, T06)
Wiring harness between CP02 (female) (114)
– M05 (male) (1)
Wiring harness between CP02 (female) (119)
– M05 (male) (3)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
CP01 (female)
Between (75) –
chassis ground
Between (114) – (119)
40 Troubleshooting
Wiper blade Resistance
Max. 1 z
Storage area
Working area Min. 1 Mz
Max. 20 z
All range
Resis-
tance
Resis-
tance
Resis-
tance
Resis-
tance
Wiper blade Resistance
Max. 1 z
Storage area
Working area Min. 1 Mz
Max. 20 z
All range
1
Max. 1 z
Max. 1 z
Max. 1 z
Max. 1 z
PC130-8