Keyword 2000 Data Line

The Keyword protocols utilize a single wire bi-directional data line between the module and the scan tool. The message structure is a request and response arrangement. Keyword 2000 is used for scan tool diagnostics only. The modules do not exchange data on these systems.

The keyword 2000 serial data line:

• The keyword 2000 serial data line allows the following to communicate with the scan tool: The engine control module.
• The keyword 2000 serial data line allows a scan tool to communicate with this module for diagnosis and testing.