Navistar Electrical Systems CV
Integration Guide
Page 5 of 84
Revision Date: 9/12/2019
WARNING - To avoid serious personal injury, possible death, or damage to the vehicle,
make sure the transmission is in neutral, parking brake is set, and the wheels are
blocked before undertaking service procedures. In addition, turn off the engine when
you leave the vehicle. Never leave the vehicle unattended with the engine running.
WARNING - To avoid personal injury, possible death, or damage to the vehicle when
adding electrical features, disconnect batteries. Reconnect batteries when installation is
complete.
Whenever disconnecting battery terminals; always disconnect the ground
terminal first. When reconnecting, always connect the ground terminal last.
To prevent injury to the eyes, face, limbs and body, it is imperative that lighted
materials, flames or sparks be kept away from the vent openings of the battery.
The gas mixture in the battery cells, which escapes through the vents, could
ignite and/or cause an explosion. This is particularly true when jumper cables are
being used.
In addition, inhaling of gas produced by the normal operation of the battery could
result in partial or permanent damage to the respiratory system.
Always wear eye protection when working around batteries. Do not attempt to
jump-start a vehicle having a frozen battery because the battery may explode. If a
frozen battery is suspected, examine all fill vents on the battery. If ice can be
seen, do not attempt to start with jumper cables as long as the battery remains
frozen. Thaw out the battery and recharge.
Do not check battery condition by shorting (flashing) across terminals.
Failure to observe these instructions could result in personal injury and/or
damage to the vehicle.
Battery cable terminals must be clean and tight. Use hot water and common baking
soda for removing terminal corrosion and for cleaning the top of the battery. Brighten
the contact surface with steel wool, apply a light coat of lubricant sealing grease such as
Fleetrite
® 472141
-C1 or equivalent and reassemble. Be sure the terminals are
clamped tightly and that the battery is clamped securely in place.
When working around the terminals and battery, use extra care to avoid shorting. A
good practice is to insulate pliers and screwdrivers.
3. Vehicle Architectures:
3.1. Multiplexing Architecture:
Unlike the electrical systems on previous models, which utilized point-to-point wiring for
all input signals and output loads, this system uses multiplex technology to provide
control and communication between major functional areas of the vehicle. Multiplexing
simply means, communicating multiple pieces of information via a single twisted pair of
wires (called the data link) without requiring a wire for each piece of information. This
