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 directly access 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.
