Grounding Practices
Illustration 16 g03881462
Typical example
Ground to battery
Illustration 17 g03881463
Typical example
Alternate ground to battery
Correct grounding for the engine electrical system is
necessary for optimum engine performance and
reliability. Incorrect grounding will result in
uncontrolled electrical circuit paths and in unreliable
electrical circuit paths.
Uncontrolled electrical circuit paths can result in
damage to the crankshaft bearing journal surfaces
and to aluminum components.
Engines that are installed without engine-to-frame
ground straps can be damaged by electrical
discharge.
To ensure that the engine and the engine electrical
systems function correctly, an engine-to-frame
ground strap with a direct path to the battery must be
used. This path may be provided by way of a direct
engine ground to the frame.
The connections for the grounds should be tight and
free of corrosion. The engine alternator must be
grounded to the negative “-” battery terminal with a
wire that is adequate to handle the full charging
current of the alternator.
The power supply connections and the ground
connections for the engine electronics should always
be from the isolator to the battery.
i06276686
Engine Electronics
Tampering with the electronic system installation
or the OEM wiring installation can be dangerous
and could result in personal injury or death and/
or engine damage.
Electrical Shock Hazard. The electronic unit injec-
tors use DC voltage. The ECM sends this voltage
to the electronic unit injectors. Do not come in
contact with the harness connector for the elec-
tronic unit injectors while the engine is operating.
Failure to follow this instruction could result in
personal injury or death.
This engine has a comprehensive, programmable
Engine Monitoring System. The Electronic Control
Module (ECM) will monitor the engine operating
conditions. If any of the engine parameters extend
outside an allowable range, the ECM will initiate an
immediate action.
The following actions are available for engine
monitoring control:
• Warning
• Derate
• Shutdown
SEBU9075-03
21
Safety Section
Engine Electronics
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