Failure Code [Dy20Ma] Wiper Parking Abnormality - Komatsu Galeo PC800-8 Shop Manual

SEN00792-02

Failure code [DY20MA] Wiper Parking Abnormality

Double-wiper specification
Action code Failure code
— DY20MA
Contents of
• When parking windshield wiper, P signal for storage area is not input.
trouble
Action of
• Turns parking output to wiper motor OFF.
controller
Problem that
appears on • Windshield wiper motor does not park.
machine
Related • Input of P signal for wiper parking area (ON/OFF) can be checked with monitoring function.
information (Code 04502 Monitor Input 3)
Defective upper windshield
1 wiper motor
(Internal disconnection)
Defective lower windshield
2 wiper motor
(Internal disconnection)
Possible causes
and standard
Disconnection in wiring har-
value in normal
ness
state
3 (Disconnection in wiring or
defective contact in connec-
tor)
4 Defective machine monitor
60
Wiper Parking Abnormality
Trouble
(Machine monitor system)
Cause Standard value in normal state/Remarks on troubleshooting
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
M05 (female)
Between (4) – (5)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
M15 (female)
Between (4) – (5)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch ON.
Wiring harness between CM01 (female) (12) –
M05 (male) (4)
Wiring harness between M05 (male) (5) – chas-
sis ground
Wiring harness between CM01 (female) (5) –
M15 (male) (4)
Wiring harness between M15 (male) (5) – chas-
sis ground
aPrepare with starting switch OFF, then turn starting switch ON and
carry out troubleshooting.
Between (12) –
chassis ground
Between (5) –
chassis ground
Wiper blade
Storage area
Working area
Wiper blade
Storage area
Working area
CM01 Upper windshield wiper
Storage area
Working area
CM01 Lower windshield wiper
Storage area
Working area
40 Troubleshooting
Resistance
Max. 1 z
Min. 1 Mz
Resistance
Max. 1 z
Min. 1 Mz
Resistance Max. 1 z
Resistance Max. 1 z
Resistance Max. 1 z
Resistance Max. 1 z
Voltage
Max. 1 V
20 – 30 V
Voltage
Max. 1 V
20 – 30 V
PC800, 850-8