Class 2 Data Line

Class 2 data transmits at a higher speed and the messages are configured differently than UART data. While UART uses a master to control serial data line traffic, class 2 uses the peer to peer method along with message arbitration to manage data line traffic. The control modules on the class 2 data line can include:
^ The Body Control Module (SBM)
^ The cellular telephone
^ The Driver Door Module (DDM)
^ The Electronic Brake/Traction Control Module (EBTCM)
^ The heater and A/C programmer
^ The instrument cluster
^ The inflatable restraint Sensing Diagnostic Module (SDM)
^ The Memory Seat Module (MSM)
^ The theft deterrent module
^ The Powertrain Control Module (PCM)
^ The Remote Function Actuator (RFA) module