Failure Code [Dy2Ckb] Washer Drive Short Circuit - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02631-02

Failure code [DY2CKB] Washer Drive Short Circuit

Action code Failure code
— DY2CKB
Contents of • When output to window washer drive system was turned OFF (ground circuit was disconnected),
trouble short circuit was detected in circuit.
Action of • Turns output to washer motor OFF.
controller • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • Window washer does not operate.
machine
Related infor-
• Method of reproducing failure code: Turn starting switch ON + Turn washer switch ON.
mation
Defective washer motor
1
(Internal short circuit)
Possible causes
and standard
value in normal
Hot short (Short circuit with
state
2
24V circuit) in wiring harness
3 Defective pump controller
58
Window washer drive 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.
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Wiring harness between CP01 (female) (3) –
J04 – M6 (female) (2), – D02 (female) (7)
If causes 1 and 2 are not detected, pump controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)
M06 (male)
Between (1) – (2)
40 Troubleshooting
1
Resistance
5 – 20 z
Voltage Max. 1 V
PC300, 350-8