Failure Code [Ab00Ke] Charge Voltage Low - Komatsu PC130-8 Shop Manual

SEN04119-01

Failure code [AB00KE] Charge voltage low

User code Failure code
— AB00KE
Contents of
• While engine is running, signal circuit of alternator detected low charge voltage (below 7.8 V).
trouble
Action of • Displays charge level monitor on machine monitor.
machine monitor • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • If machine is operated as it is, battery may not be charged.
machine
Related • Signal voltage of alternator can be checked with monitoring function. (Code: 04300 Charge voltage)
information • Method of reproducing failure code: Start engine.
Defective alternator
1
(when system is normal)
Disconnection in wiring har-
ness
2 (Disconnection in wiring or
defective contact in connec-
Possible causes
tor)
and standard
value in normal
Ground fault in wiring har-
state
ness
3
(Short circuit with GND cir-
cuit)
4 Defective machine monitor
6
Charge voltage low
Trouble
(Machine monitor system)
Cause Standard value in normal state/Remarks on troubleshooting
a
(1) – chassis ground
a
Wiring harness between CM01 (female) (11)
– J02 – M22 (female) (1)
a
Wiring harness between CM01 (female) (11)
– J02 – M22 (female) (1) and circuit branch
end and chassis ground
a
Between (11) –
chassis ground
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
M22 (male) Engine speed
Min. medium speed
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
CM01 Engine speed
Operation
40 Troubleshooting
1
Voltage
27.5 – 29.5 V
Resis-
Max. 1 z
tance
Resis-
Min. 1Mz
tance
Voltage
Min. 7.8 V
PC130-8