Failure Code [Dy20Ma] Wiper Parking Abnormality - Komatsu PC200-8M0 Shop Manual

SEN06137-00

Failure code [DY20MA] Wiper Parking Abnormality

Action
Failure code
level
– DY20MA
q
Detail of failure When windshield wiper rests, P signal for rest area is not input.
q
Action of con- Stops output for resting to wiper motor.
q
troller If cause of failure disappears, machine becomes normal by itself.
Problem on
q
Wiper motor does not rest.
machine
q
Condition of P contact signal of wiper resting area can be checked with monitoring function.
(Code: 02204 Switch input 5)
q
Related infor- As T-adapter for pump controller connector is "socket-type box", operating voltage cannot be mea-
mation sured at pump controller connector.
q
Method of reproducing failure code: Turn starting switch to ON position and set wiper switch from
INT/ON to OFF.
Cause
Defective wiper motor
1
(Internal open circuit)
Open or short circuit in wiring har-
2
ness
Open circuit in wiring harness
3 (wire breakage or defective con-
tact of connector)
4 Defective pump controller
42
40-305
Wiper Parking Abnormality
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector M05 and connect T-adapters to female side.
Between M05 (female)
(4) and (5)
Between M05 (female)
(1) and (3)
1. Turn starting switch to OFF position.
2. Disconnect connectors C01 and C02 and connect T-adapters to each
female side.
Between C01 (female)
(75) and ground
Between C02 (female)
(114) and (119)
a If no failure is found by check on cause 2, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors C01, C02, and M05.
3. Connect T-adapters to female sides of connector C01 and C02 and to male
side of M05.
Between C01 (female) (75) and M05 (male) (4)
Between M05 (male) (5) and ground (T05)
Between C02 (female) (114) and M05 (male) (1)
Between C02 (female) (119) and M05 (male) (3)
If no failure is found by above checks, pump controller is defective. (Since this
is an internal defect, troubleshooting cannot be performed.)
305 Troubleshooting by failure code, Part 5
Failure code [DY20MA] Wiper Parking Abnormality
Wiper position: rest area Resistance
Wiper position: working
area
Wiper position: whole
range
Wiper position: rest area Resistance
Wiper position: working
area
Wiper position: whole
range
PC200, 200LC, 220, 220LC-8M0
Max. 1 z
Resistance Min. 1 Mz
Max. 20 z
Resistance
Max. 1 z
Resistance Min. 1 Mz
Max. 20 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance