Diagnostic Services

Diagnostic Services

The diagnostic services available in UDS are grouped in functional units and identified by a one-byte code (ServiceId). Not all codes are defined in the standard; for some codes, the standard refers to other standards, and some are reserved for manufacturer-specific extensions. The Automotive Diagnostic Command Set supports the following services:

• Diagnostic Management
• Data Transmission
• Stored Data Transmission (Diagnostic Trouble Codes)
• Input/Output Control
• Remote Activation of Routine

For UDS on LIN, a slave node must support a set of ISO 14229-1 diagnostic services such as:

• Node identification (reading hardware and software version, hardware part number, and diagnostic version)
• Reading data parameters (reading ECU internal values such as oil temperature and vehicle speed)
• Writing parameter values if applicable

Note  For more information about the LIN Diagnostic service implementations, refer to the LIN Specification Package, Revision 2.2, from the LIN Consortium.