Failure Code [Dy2Ekb] Wiper Drive (Rev) Short Circuit - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02631-02

Failure code [DY2EKB] Wiper Drive (Rev) Short Circuit

Action code Failure code
— DY2EKB
Contents of
• When output to wiper motor drive reverse side was turned ON, short circuit was detected in circuit.
trouble
Action of • Turns output to wiper motor drive reverse 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 infor-
• Method of reproducing failure code: Turn starting switch ON + Set wiper switch to INT or ON.
mation
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
62
Wiper motor drive reverse system short circuit
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between (1) – chassis ground
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Wiring harness between CP02 (female)
(114) – M05 (male) (1)
If causes 1 and 2 are not detected, pump controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)
M05 (female)
Between (1) – (3)
40 Troubleshooting
1
Continuity/Resistance
There is continuity
Min. 1 Mz
Resis-
Min. 1 Mz
tance
PC300, 350-8