Komatsu ecot3 PC300LC-8 Shop Manual page 619

40 Troubleshooting
Defective wiring harness
8
connector
Possible causes
and standard
value in normal
state
9 Defective engine controller
Circuit diagram related to engine controller power supply
PC300, 350-8
Cause Standard value in normal state/Remarks on troubleshooting
Connecting parts between fuse No. 19 – machine wiring harness –
engine controller may be defective. Check them directly.
• Looseness of connector, breakage of lock, or breakage of seal
• Corrosion, bend, breakage, push-in, or expansion of pin
• Moisture or dirt in connector or defective insulation
a
CE03 (female)
Between (3) – (1)
Prepare with starting switch OFF, then turn starting switch ON
and start engine and carry out troubleshooting in each case.
Starting switch
START
SEN02630-05
Voltage
ON Min. 24 V
Min. 12 V
17