You may access 2 data lines with the scan tool. The serial
data line UART (circuit 800) allows the following components to communicate
via serial data:
| • | The powertrain control module (PCM) |
| • | The instrument panel cluster |
| • | The sensing diagnostic module (SDM) |
| • | The electronic brake control module (EBCM) |
The serial data line class 2 (circuit 1807) allows the scan tool
to access directly the PCM in order to read emissions-related information.
The scan tool gains access to both data lines through the data link
connector (DLC). You may then monitor or control system operations for
diagnostic purposes.
