Information Bus: Description and Operation

The data link connector (DLC) contains the following components:
^ The UART serial data line (CKT 800)
- The UART serial data line (CKT 800) allows the following components to communicate data with each other:
^ The powertrain control module (PCM)
^ The inflatable restraint diagnostic energy reserve module with sensor
^ The electronic brake control module (EBCM)
- The UART serial data line allows a scan tool to communicate with these modules for diagnosis and testing.
^ The class 2 serial data line (CKT 1807) The class 2 serial data line allows a scan tool to communicate with the PCM for diagnosis and testing.
^ Unswitched voltage (B+) (CKT 640)
^ Ground (CKT 1550)
^ The theft deterrent module test light output (CKT 728) (SEO equipped vehicles only). The theft deterrent module test light output allows a test lamp or a scan tool to monitor the theft deterrent module.