Travel Alarm Does Not Sound Or Does Not Stop Sounding - Komatsu PC130-7 Shop Manual

TROUBLESHOOTING
E-33 Travel alarm does not sound or does not stop sounding
When travel alarm is installed
(1) Alarm does not sound while machine is traveling.
Trouble
(2) Alarm sounds while machine is stopped.
Related
information
1 Defective fuse No. 15
2 Defective travel signal
Disconnection in wiring
Possible causes
harness
and standard
3 (Disconnection in wiring
value in normal
harness or defective
state
contact in connector)
Short circuit with chassis
ground in wiring harness
4
(Contact with ground
circuit)
5 Defective travel alarm
PC130-7
Cause Standard value in normal state/Remarks on troubleshooting
If the fuse is broken, the circuit probably has a grounding fault, etc.
(See cause 4.)
aStart engine and carry out troubleshooting (Travel lever).
Monitoring code
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Wiring harness between FB1-15 outlet and J03
and A43 (female) (1)
Wiring harness between A43 (female) (2) and
J01 (male) (19)
aPrepare with starting switch OFF, then carry out troubleshooting with-
out turning starting switch.
Between FB1-15 outlet – J03 – A43 (female)
(1) or other related circuit wiring harness and
chassis ground
Troubleshooting cannot be carried out since the defect is in the travel
alarm (If none of the above causes 1 – 4 is the cause of the trouble, the
travel alarm is defective).
6-bit display
(Right of lower line)
020
E-33
When lever is
operated: ON
When lever is in
neutral: OFF
Max. 1 z
Resistance
Max. 1 z
Resistance
Min. 1 Mz
Resistance
20-475
(1)