October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Serial Data Reference

The scan tool communicates over the various busses on the vehicle. In order to avert misdiagnoses of No Communication with a specific module and to determine if a module is low or high speed, refer to Data Link References for a list of modules, the busses they communicate with, and the RPO codes for a specific module.