When Starting Switch Turned On (Before Starting Engine), Basic Check Item Lights Up - Komatsu Galeo PC138US-8 Shop Manual

SEN02467-00
E-2 When starting switch turned ON (before starting engine), basic
check item lights up
Trouble • Engine oil level monitor lights up red.
Related • Condition of engine oil level switch signal can be checked with monitoring function.
information (Code: 04501 Monitor input 2)
Lowering of engine oil level
1
(When system is normal)
Defective engine oil level
2 switch (Internal disconnec-
tion)
Possible causes
and standard
Disconnection in wiring har-
value in normal
ness (Disconnection in wiring
state
3
or defective contact in con-
nector)
4 Defective machine monitor
Circuit diagram related
8
Cause Standard value in normal state/Remarks on troubleshooting
Engine oil level may be low. Check it and add oil if necessary.
a Prepare with starting switch OFF, then carry out troubleshoot-
chassis ground
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between CM02 (female) (2)
– P44 (female) (1)
a Prepare with starting switch OFF, then turn starting switch ON
chassis ground
ing without turning starting switch ON.
P44 (male) Engine oil level
Between H – L
Between (1) –
ing without turning starting switch ON.
and carry out troubleshooting.
CM02 Engine oil level
Between H – L
Between (2) –
40 Troubleshooting
Resistance
Max. 1 z
Below L Min. 1 Mz
Resis-
tance
Voltage
Max. 1 V
Below L 20 – 30 V
PC138US, USLC-8
1
Max. 1 z