UART Data Line
WARNING: This page is about a different variant/trim than selected.
The UART serial data communication relies on a 5 volt digital signal for the exchange of data between different control modules and a scan tool. When the ignition is in RUN and there is no data transmission, there is a constant 5 volts on the data line. Communication on the line brings the voltage to 0 volts. The supplemental restraint Sensing and Diagnostic Module (SDM) communicates on the UART data line.