Failure Code [Dy2Ckb] Washer Drive Short Circuit - Komatsu PC200-8M0 Shop Manual

SEN06137-00

Failure code [DY2CKB] Washer Drive Short Circuit

Action
Failure code
level
– DY2CKB
q
When outputting current to window washer motor, abnormal current flows and short circuit is de-
Detail of failure
tected.
q
Shuts of power supply to washer motor.
Action of con-
q
Even if cause of failure disappears, machine does not become normal until starting switch is turned
troller
to OFF position.
Problem on
q
Window washer does not operate.
machine
q
Related infor- Method of reproducing failure code: Turn starting switch to ON position and turn washer switch to
mation ON position.
Cause
1 Defective fuse No.4
Defective washer motor
2 (internal open circuit or ground
fault)
Defective diode array D02
3
(Internal short circuit)
Ground fault in wiring harness
4
(contact with ground circuit)
Hot short circuit in wiring harness
5
(contact with 24 V circuit)
6 Defective pump controller
44
40-305
Window Washer Drive Short Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
If the fuse is broken, the circuit probably has a grounding fault, etc.
1. Turn starting switch to OFF position.
2. Disconnect connector M06 and connect T-adapters to male side.
Between M06 (male) (1) and (2)
Between ground and M06 (male) (1) or (2)
1. Turn starting switch to OFF position.
2. Disconnect connector D02 and connect T-adapters to male side.
a Check the continuity in diode range.
Between D02 (male) (7) (+) and (3) (-)
Between D02 (male) (3) (+) and (7) (-)
1. Turn starting switch to OFF position.
2. Remove fuse No.4
3. Disconnect connectors M06, C01, and D02, and connect T-adapters to
either female side.
Between F01 (4) or M06 (female) (2) or D02
(female) (3) and ground
Between C01 (female) (3) or M06 (female) (1) or
D02 (female) (7) and ground
1. Turn starting switch to OFF position.
2. Disconnect connectors C01 and M06 and connect T-adapters to female
side of C01.
3. Remove fuse No.4
4. Turn starting switch to ON position.
a Ignore failure code displayed on machine monitor.
Between C01 (female) (3) and ground
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 [DY2CKB] Washer Drive Short Circuit
Resistance
Resistance Min. 1 Mz
Resistance Min. 1 Mz
Resistance Min. 1 Mz
PC200, 200LC, 220, 220LC-8M0
5 to 20 z
Continuity
No continuity
Voltage Max. 1 V