Data Link Communications Description and Operation

Data Link Communications Description and Operation

Data Link Communications Circuit Description and Operation

The Class 2 serial data link allows specified modules to transmit, receive, or exchange data;

* Powertrain control module (PCM){class 2 module for L18}
* Transmission control module (TCM){class 2 module for LG5}

The Class 2 serial data link allows a scan tool to communicate with these modules listed above for testing purposes, checking for diagnostic trouble codes (DTCs), and to activate/enable/disable functions.

The data link connector has a ground for the serial data signal exiting the scan tool.

The scan tool is also supplied power and ground at the data link connector.

UART Data Link Communications Description

The UART serial data circuit allows communication between the EBCM module and the DLC.

The UART serial data link allows a scan tool to communicate with the EBCM for testing and diagnostic purposes.