Failure Code [Dy2Dkb] Wiper Drive (For) Short - Komatsu Galeo PC138US-8 Shop Manual

SEN02466-00

Failure code [DY2DKB] Wiper drive (for) short

User code Failure code
— DY2DKB
Contents of
• When output to wiper motor drive forward side was turned ON, short circuit was detected in circuit.
trouble
Action of • Turns output to wiper motor drive forward side OFF.
controller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Windshield wiper does not operate.
machine
Related
• Method of reproducing failure code: Turn starting switch ON + Set wiper switch to INT or ON.
information
Defective wiper motor (Inter-
1 nal short circuit or ground
fault)
Possible causes
and standard
value in normal
Ground fault in wiring har-
state
2 ness (Short circuit with GND
circuit)
3 Defective pump controller
16
Wiper motor drive forward system short
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
Between (3) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between C02 (female) (119)
– M05 (male) (3)
If causes 1 and 2 are not detected, pump controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)
ing without turning starting switch ON.
M05 (female)
Between (3) – (1)
ing without turning starting switch ON.
40 Troubleshooting
1
Resistance
There is continuity
Min. 1 Mz
Resis-
Min. 1 Mz
tance
PC138US, USLC-8