New Yorker V6-181 2972cc 3.0L SOHC VIN 3 FI (1989)
Body Controller: Description and Operation
C2D Bus
The Chrysler Collision Detection multiplex system (C2D Bus) is a twisted pair of wires which travel from module to module receiving and delivering
coded information. The code is designed to identify the message it represents as well as the importance of the message. When there are multiple
messages attempting to access the C2D bus at one time, the code is used to determine which one has higher priority and is allowed access to the bus
first.
The two wires (MX1 and MX2) used by the C2D system are generally called bus + and bus -. Both bus Wires have a measurable voltage level of
roughly 2.5 volts. In order to maintain the 2.5 volts on each line and provide a means of transportation for the coded messages there must be a voltage
divider network consisting of modules with Bias and others with termination. Bias is the part of the voltage divider network which places both bus +
and bus - at 2.5 volts. Termination is the circuitry required to complete the voltage divider network and also provide some electromagnetic protection
for the bus.
