Komatsu 114E-3 Series Shop Manual page 239

40 Troubleshooting SEN00460-01
Causes Standard value in normal state/Remarks on troubleshooting
Possible causes
a Prepare with starting switch OFF, then turn starting switch ON and
and standard
carry out troubleshooting.
value in normal
10 Defective engine controller
J1 Voltage
state
Between (37) – (47) Power supply 4.75 – 5.25 V
Circuit diagram related to engine Bkup speed sensor
39
114E-3 Series