Paccar Kenworth T170 Hybrid 2011, Builder'S Manual

Page: 131 / 179

Section 8
Electrical
8-3
12/11
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
Figure 8-4, Multiplexed Instrumentation Block Diagram on page 8-3 .
DWIM
ELECTRONIC
CVSGs
POWER TRAIN
CONTROLLERS
I-CAN
CSVG BUS
FIREWALL
V-CAN
ELECTRIC
SWITCHES
(SOME)
CECU 3
FIGURE 8-4.
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) .
• I-CAN = Instrumentation Controller Area Network
The I-CAN provides data link communication from the Cab Electronic Control Unit (CECU) to the Central
Instrument Cluster .
• 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 another.