Komatsu Galeo PC138US-8 Shop Manual page 516

40 Troubleshooting
Ground fault in wiring har-
4 ness (Short circuit with GND
Possible causes
circuit)
and standard
value in normal
state
5 Defective engine controller
PC138US, USLC-8
Cause Standard value in normal state/Remarks on troubleshooting
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between CE02 (female) (55)
– R23 (1) and chassis ground
Wiring harness between CE02 (female) (55)
– R24 (1) and chassis ground
Wiring harness between CE02 (female) (32)
– R23 (2) and chassis ground
Wiring harness between CE02 (female) (32)
– R24 (2) and chassis ground
Wiring harness between CE03 (female) (3)
– R23 (5) and chassis ground
Wiring harness between CE03 (female) (3)
– R24 (5) and chassis ground
Wiring harness between R23 (female) (3) –
battery (+) and chassis ground
Wiring harness between R24 (female) (3) –
battery (+) and chassis ground
a Prepare with starting switch OFF, turn starting switch ON and
ing without turning starting switch ON.
carry out troubleshooting.
CE03
Between (3) – (1)
SEN02463-01
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage
20 – 30 V
11