Unified Diagnostic Service-UDS | Diagnostic Session Control (0x10) |
Unified Diagnostic Services (UDS) is a diagnostic communication protocol used in electronic control units (ECUs) within automotive electronics, which is specified in the ISO 14229-1
Diagnostic Session Control:
UDS uses different operating sessions, which can be changed using the "Diagnostic Session Control". Depending on which session is active, different services are available. On start, the control unit is by default in the "Default Session". Other sessions are defined, but are not required to be implemented depending on the type of device:
"Programming Session" used to upload software.
"Extended Diagnostic Session" used to unlock additional diagnostic functions, such as the adjustment of sensors.
"Safety system diagnostic session" used to test all safety-critical diagnostic functions, such as airbag tests.
In addition, there are reserved session identifiers that can be defined for vehicle manufacturers and vehicle suppliers specific use.