Failure Code [Dv20Kb] Travel Alarm S/C - Komatsu Galeo PC800-8 Shop Manual

SEN00792-02

Failure code [DV20KB] Travel Alarm S/C

Action code Failure code
— DV20KB
Contents of
• Abnormal current flowed in the travel alarm circuit, when power is supplied to the circuit.
trouble
• Power to the travel alarm circuit is switched OFF.
Action of
• Even after the failure cause disappears of itself, the machine operation does not return to normalcy,
controller
unless the engine starting switch is once turned OFF.
Problem that
appears on • The travel alarm does not sound.
machine
Related • Operation of the travel alarm (ON or OFF) can be checked in the monitoring function.
information (Code No. 03701: Controller output 2)
Travel alarm defective
1
(Internal defect)
Possible causes
and standard
Grounding fault of wiring
value in normal
harness
state
2
(Contact with grounding cir-
cuit)
3 Pump controller defective
20
Travel Alarm S/C
Trouble
(Pump controller system)
Cause Standard value in normal state/Remarks on troubleshooting
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
M14 (female)
Between (1) – (2)
If the above voltage is normal but the travel alarm does not operate, the
travel alarm is defective.
aTurn the engine starting switch OFF for the preparations, and hold it in
the OFF position during the troubleshooting.
Between wiring harness between CP03
(female) (8) – M14 (female) (1) and grounding
aTurn the engine starting switch OFF for the preparations, and keep the
engine running during the troubleshooting.
Between (8) – chassis
Travel lever
Neutral
Operated
CP03 Travel lever
Neutral
ground
Operated
40 Troubleshooting
Voltage
Max. 1 V
20 – 30 V
Resistance Min. 1 Mz
Voltage
Max. 1 V
20 – 30 V
PC800, 850-8