Circuit/System Description

A private CAN bus is used to communicate information between the electronic brake control module, yaw and lateral accelerometer sensor, and steering angle sensor. The serial data is transmitted on two twisted wires that allow speeds up to 500 Kb/s. The twisted pair is terminated with two 120 Ω resistors, one is internal to the electronic brake control module (EBCM) and the other can be a separate resistor in a connector assembly or in another sensor. The resistors are used as the load for the bus during normal vehicle operation. If serial data is lost, electronic brake control module will set a no communication code against the non-communicating sensor. Note that a loss of serial data DTC does not represent a failure of the control module that set it.