Handling High-Voltage Circuit Of Engine Controller; 30 Testing And Adjusting; Testing And Adjusting, Part 3 - Komatsu PC210-8 Shop Manual

UEN00230-00

Testing and adjusting, Part 3

Handling high-voltage circuit of
engine controller
k
The engine controller uses a high-voltage
circuit (max. 65 V) to drive the injector.
Accordingly, the high-voltage circuit is con-
nected to the wiring harnesses and connec-
tors between the engine controller and
injector.
a Normally, the engine controller keeps output-
ting the high voltage to the injector only while
the engine is running and stops outputting
when the engine stops.
k
If you touch the high-voltage circuit
directly, you may get an electric shock. To
avoid this, observe the following precau-
tions when testing.
1. The following connectors are used in the high-
voltage circuit.
Engine controller connector: CE01
q
Injector intermediate connectors:
q
INJ CYL 1 and 2, INJ CYL 3 and 4,
INJ CYL 4 and 5
Injector head terminal (in head cover)
q
2. When disconnecting or connecting a connector
related to the high-voltage circuit, be sure to
turn the starting switch OFF.
3. If a T-adapter is inserted in or connected to a
connector related to the high-voltage circuit for
troubleshooting, do not start the engine.
a You may turn the starting switch to the
OFF or ON position but must not turn it to
the START position.
2
1

30 Testing and adjusting

PC210, 230, 240-8
1