Komatsu PC130-8 - Page 575

40 Troubleshooting SEN04120-03
PC130-8
15
Circuit diagram related
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
5
Short circuit in wiring har-
ness
(With another wiring har-
ness)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between ENG1 (female)
(36) – PFUEL (female) (3) and
wiring harness between ENG1 (female) (29)
– PFUEL (female) (2)
Resis-
tance
Min.1 Mz
Wiring harness between ENG1 (female)
(36) – PFUEL (female) (3) and
wiring harness between ENG1 (female) (48)
– PFUEL (female) (1)
Resis-
tance
Min.1 Mz
Wiring harness between ENG1 (female)
(29) – PFUEL (female) (2) and
wiring harness between ENG1 (female) (48)
– PFUEL (female) (1)
Resis-
tance
Min.1 Mz
6 Defective engine controller
a Prepare with starting switch OFF, then turn starting switch ON
or start engine and carry out troubleshooting.
ENG1 Voltage
Between (36) – (48) 4.75 – 5.25 V
Between (29) – (48) 0.25 – 4.6 V