Failure Code [Dy20Ka] Wiper Working Abnormality - Komatsu PC200-8M0 Shop Manual

SEN06137-00

Failure code [DY20KA] Wiper Working Abnormality

Action
Failure code
level
– DY20KA
q
Detail of failure When windshield wiper works, W signal of working ends is not input.
q
Action of con- Shuts off power supply to wiper motor.
q
troller If cause of failure disappears, machine becomes normal by itself.
Problem on
q
Wiper motor does not work.
machine
q
Signal input (ON/OFF) of W contact that indicates wiper working area end 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.
a Single wiper does not have lower wiper of double wiper (Upper wiper is called wiper).
q
Method of reproducing failure code: Turn starting switch to ON position and set wiper switch to INT
or ON.
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
40
40-305
Wiper Working Error
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)
(6) 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)
(56) 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) (56) and M05 (male) (6)
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 [DY20KA] Wiper Working Abnormality
Wiper position: working
area end
Wiper position: other than
working area end
Wiper position: whole
range
Wiper position: working
area end
Wiper position: other than
working area end
Wiper position: whole
range
PC200, 200LC, 220, 220LC-8M0
Max. 1 z
Resistance
Resistance Min. 1 Mz
Max. 20 z
Resistance
Max. 1 z
Resistance
Resistance Min. 1 Mz
Max. 20 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance