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30 Testing and adjusting
Preparation work for
troubleshooting of electrical
system
a When carrying out troubleshooting of an elec-
tric circuit related to the machine monitor,
e n g i n e c o n t r o l l e r, p u m p c o n t r o l l e r, o r
KOMTRAX communication MODEM, expose
the related connectors according to the follow-
ing procedure.
a Disconnect and connect the connectors having
special locking mechanisms according to the
procedure shown below.
1.
Machine monitor
1)
Remove 2 mounting bolts and cover (1).
a One of the mounting bolts is installed
in the cover on the right of the day-
light sensor.
a While removing the mounting bolts,
disconnect connector P31 of the day-
light sensor.
a The following figure shows the model
o f t h e a r m c r a n e s p e c i f i c a t i o n
equipped with a level. If the machine
which you are working on has the arm
crane specification, remove level (2).
2)
Remove 1 mounting bolt and duct (3).
PC130-8
3)
Insert or connect troubleshooting T-adapt-
ers in or to connectors CM01, CM02, and
CM03 of machine monitor (4).
1
a Connectors CM02 and CM03 are of
the same type. When returning them,
check the mark plates of the mount-
ing brackets and take care not to
make a wrong connection.
2.
Engine controller
1)
Open the engine hood.
a The engine controller is mounted on
the cooling frame (on the counter-
weight side).
2)
Insert or connect troubleshooting T-adapt-
ers in or to connectors CE01, CE02, and
CE03 of engine controller (5).
a Connectors CE01 and CE02 are fixed
with screws. When disconnecting
them, loosen the screws.
a When returning connectors CE01 and
CE02, tighten the screws to the spec-
ified torque.
3
SEN04116-00
Screw: 3 ± 1 Nm {0.3 ± 0.1 kgm}
3
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Troubleshooting
