Tesla describes Service Mode as a diagnostic and repair interface on the vehicle touchscreen. A separate diagnostic software subscription provides Toolbox, Service Mode Plus and theory-of-operation information. Tesla diagnostic software.
Toolbox
Toolbox provides vehicle information, supported commands and a troubleshooting knowledge base. Tesla service procedures also refer to Toolbox 3. A local computer connection to a vehicle uses a diagnostic Ethernet cable; remote access is subject to vehicle-owner authorisation. Tesla Model 3 Toolbox procedure; Tesla remote connections.
Service Mode and access
Service Mode runs on the vehicle touchscreen. Service Mode Plus adds advanced functions and requires a diagnostic software subscription and a local Toolbox connection. Some security-related Toolbox operations require additional authorisation, depending on the region; a subscription alone does not grant every action. Tesla Service Mode; Tesla diagnostic access.