300 SRT-8 V8-6.1L VIN W (2005)
Information Bus: Description and Operation
All models use the Controller Area Network (CAN) protocol for their intra-vehicle communications networks (data buses).
Compared to its predecessor, J1850, CAN architecture offers the following improvements:
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Eight-times faster to ensure that messages reach their destinations in a timely manner (J1850 operates at 10.4 Kbs compared to 83.3 Kbs for the
CAN system).
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Built-in error checking capabilities for increased reliability.
This model uses four buses: CAN B, CAN C, diagnostic CAN C and the LIN (Local Interconnect Network) data bus. CAN B and the LIN bus operate at
a lower speed than CAN C and diagnostic CAN C to provide communication among body and interior modules. CAN C is exclusively for critical
powertrain, anti-lock brake and electronic stability program functions. The LIN bus is used on a limited basis for the steering wheel switches that control
the EVIC. LIN is used for a local area where wires need to be kept to a minimum. The LIN used on this model is a single wire that takes information and
places it on the CAN B bus. The diagnostic CAN C bus transmits diagnostic information to an industry-standard connector for access by service
personnel using a plug-in scan tool. This system allows diagnostic data to be obtained from the other two bus systems without affecting the functions of
either.
The added communication speed specifically allows the All-Speed Traction Control and ESP (Electronic Stability Program) modules to notify the
powertrain control module when engine torque change or a transmission shift are required to avoid wheel slip and maintain stability. Data from control
modules on the CAN-C network elsewhere in the vehicle, such as vehicle speed, is transmitted to the body and interior CAN-B network via an interface
in the IPM (Intelligent Power Module).