Figure 8-3: Multiplexed Instrumentation Block Diagram - Kenworth t800 Owner's Manual

Data Bus Communication
The multiplexed instrumentation system uses several different data links to transmit input/output data from other systems
to the Cab Electronic Control Unit (CECU), and ultimately to the Central Instrument Cluster and CVSG Gauges. See Fig-
ure 8-3, Multiplexed Instrumentation Block Diagram on page 8-3.
Driver
Performance
Center
Cluster
CVGS Bus
Electrinic CVSGs
Spare Inputs
FIGURE 8-3. Multiplexed Instrumentation Block Diagram.
• V-CAN = Vehicle Controller Area Network
The V-CAN, also referred to as the J1939, is used to transmit data between the transmission, ABS system, engine, etc. to
the Cab Electronic Control Unit (CECU).
• B-CAN = Body Builder Controller Area Network.
the B-Can provided the body builder access to J1939 data at a convenient back of cab harness location. This optional har-
ness is available on all models.
• I-CAN = Instrumentation Controller Area Network
The I-CAN provides data link communication from the Cab Electronic Control Unit (CECU) to the Central Instrument Clus-
ter.
• F-CAN = Frame Controller Area Network
The F-CAN provides a data link communication from the Cab Electronic Control Unit (CECU) to the Chassis Node to
control lighting functions.
• CVSG Bus
The CVSG bus is a private data bus used to transmit data from the Cab Electronic Control Unit (CECU) to the individual
2-inch gauges. A series of "daisy chained" jumper harnesses link each gauge to one another.
D-CAN
MCS
I-CAN
CECU 3
Switches
Firewall
Diagnostic
Connector
V-CAN
B-CAN
Customer Installed
F-CAN
Chassis
Node
Front Lamps Tail/Trailer Lamps
8-3
Section 8
Electrical
Automated
Engine
Transmission
Adaptive Cruise
ABS
Control
NavPlus
ECU's
Voltage Sensors
Fuel Sensors
Current Sensors
Vacuum Sensor
Temp Sensors
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