Komatsu Galeo PC138US-8 Shop Manual page 520

40 Troubleshooting
Short circuit in wiring har-
ness
5
Possible causes
(With another wiring har-
and standard
ness)
value in normal
state
6 Defective engine controller
Circuit diagram related
PC138US, USLC-8
Causes
a Prepare with starting switch OFF, then carry out troubleshoot-
Wiring harness between CE01 (female) (19)
– PTIM (female) (1) and wiring harness
between CE01 (female) (36) – PTIM
(female) (2)
Wiring harness between CE01 (female) (19)
– PTIM (female) (1) and wiring harness
between CE01 (female) (48) – PTIM
(female) (4)
Chassis ground between CE01 (female)
(36) – PTIM (female) (2) and chassis ground
between CE01 (female) (48) – PTIM
(female) (4)
a Prepare with starting switch OFF, turn starting switch ON and
Between (36) – (48)
Standard value in normal state/Remarks on troubleshooting
ing without turning starting switch ON.
carry out troubleshooting.
CE01
Power supply
SEN02463-01
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Resis-
Min. 1 Mz
tance
Voltage
4.75 – 5.25 V
15