Failure Code [Df10Kb] Travel Speed Range Selector Switch: Hot Short - Komatsu WA250-6 Shop Manual

SEN03846-00

Failure code [DF10KB] Travel speed range selector switch: Hot short

Action code Failure code
E01 DF10KB
Contents of
• Multiple travel speed range selector switch signal is input because of hot short in travel speed range
trouble
selector switch input signal system.
Action of • Fixes gear to speed range before error occurrence.
controller
• If trouble disappears, system resets itself.
• Once starting switch is turned OFF, gear speed is assumed to be 4th for control, regardless of
selected speed range.
Problem that
appears on • Gear is not set in selected speed range.
machine
• Indicator displays range before error occurrence.
(Once starting switch is turned OFF, 4th gear is displayed)
Related
• Method of reproducing failure code: Turn starting switch ON + Operate speed range selector switch.
information
Defective travel speed range
1 selector switch (Internal
defect)
Possible causes
and standard
value in normal
state
Defective travel speed range
2 selector resistor (Internal
defect)
Hot short (Contact with 24V
3
circuit) in wiring harness
6
40-360
Failure code [DF10KB] Travel speed range selector switch: Hot short
Travel speed range selector switch: Hot short
Trouble
(HST controller system)
Causes
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
Between (1) – (2)
Between (1) – (3)
Between (1) – (4)
Between (2) – (3)
Between (2) – (4)
Between (3) – (4)
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.
Between wiring harness HST (female) (32) –
L70 (female) (7) and ground
Between wiring harness HST (female) (39) –
L03 (female) (3), L70 (female) (5), (3) and
ground
Between wiring harness L03 (female) (1) –
L70 (female) (6) and ground
360 Troubleshooting by failure code (Display of code), Part 6
Standard value in normal state/Remarks on troubleshooting
L03 (female) Switch position
Other than above
Other than above
– (Anytime)
– (Anytime)
L70 (male)
Between (1) – (5)
Between (2) – (6)
Between (3) – (7)
Between (4) – (8)
Resistance
Max. 1 z
2nd
Min. 1 Mz
1st Min. 1 Mz
2nd Min. 1 Mz
3rd Max. 1 z
4th Max. 1 z
4th Max. 1 z
Min. 1 Mz
Min. 1 Mz
Min. 1 Mz
1st Max. 1 z
2nd Min. 1 Mz
3rd Min. 1 Mz
Max. 1 z
4th
Resistance
100 z ± 1%
220 z ± 1%
330 z ± 1%
470 z ± 1%
Voltage
Voltage
Voltage
WA250, 250PZ-6
Max. 1 V
Max. 1 V
Max. 1 V