UART Data line

UART-Based communication systems have a master of the serial data line and remote transceivers. The master controls the message traffic on the serial data line by polling all of the remotes (control modules). The master then waits for the proper response.

• The UART serial data line: The UART serial data line allows the following components to communicate data with a scan tool:
  • The electronic brake control module (EBCM)
  • The transaxle control module (TCM)
  • The inflatable restraint sensing and diagnostic module (SDM)
  • The immobilizer control module
  • The anti-theft module
• The UART serial data line allows a scan tool to communicate with these modules for diagnosis and testing.