Tinkla OBD-C Adapter connects to your preAP Tesla Model S' OBD2 port in order to power the Comma devkit and also talk to your car's Chassis CAN bus. Depending on the year/month when your car was manufactured, your OBD2 port might or might not have the pins 1 and 9 (which have the Chassis CAN bus) populated. Do not despair, we have a solution for that.
First, use the instructions from our wiki to get the info needed to locate your OBD2 connector and to check and see if you do or do not have the right pins populated with connectors.
If you are missing the pins, you can purchase the Tinkla Chassis CAN Retrofit Harness from our store. This easy to install harness will populate pins 1 and 9 on your vehicle with Chassis CAN signal taken from the Tesla Diagnostic Port from underneath your center console display. Takes very little time to install and is a permanent upgrade to your car.