Precaution Lights Up While Engine Is Running - Komatsu PC130-8 Shop Manual

SEN04123-01
E-7 Precaution lights up while engine is running
Trouble (1) Charge level monitor lights up red.
Related • Signal voltage of alternator can be checked with monitoring function.
information (Code: 04300 Charge voltage)
Defective generation by
1 alternator (when system is
normal)
Disconnection in wiring har-
ness (Disconnection in wiring
2
or defective contact in con-
Possible causes
nector)
and standard
value in normal
state
Ground fault in wiring har-
3 ness (Short circuit with GND
circuit)
4 Defective machine monitor
20
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
Between (1) –
chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CM01 (female)
(11) – J02 – M22 (female) (1)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between CM01 (female)
(11) – J02 – M22 (female) (1), – circuit
branch end and chassis ground
a Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
Between (11) –
chassis ground
M22 (male) Engine speed
Middle or higher
CM01 Engine
Running
40 Troubleshooting
1
Voltage
27.5 – 29.5 V
Resis-
Max. 1 z
tance
Resis-
Min. 1 Mz
tance
Voltage
Min. 7.8 V
PC130-8