Failure Code [Dy20Ma] Wiper Parking Abnormality - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02631-02

Failure code [DY20MA] Wiper Parking Abnormality

Action code Failure code
— DY20MA
Contents of
• When windshield wiper rests, 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 rest 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
2
or defective contact in con-
state
nector)
3 Defective pump controller
54
Wiper resting abnormality
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between (4) – (5)
Between (1) – (3)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between CP01 (female) (75)
– M05 (male) (4)
Wiring harness between M05 (female) (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 troubleshooting
without turning starting switch ON.
CP01 (female)
Between (75) –
chassis ground
Between (114) – (119)
M05 (female) Wiper position
Storage area
Working area
All range
Wiper position
Storage area
Working area
All range
40 Troubleshooting
1
Resistance
Max. 1 z
Min. 1 Mz
Max. 20 z
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resis-
Max. 1 z
tance
Resistance
Max. 1 z
Min. 1 Mz
Max. 20 z
PC300, 350-8