UDS Knowledge Base

This section of the documentation provides technical support for users of the UDS package, helping you gain a deeper understanding of the UDS protocol itself.

Table of Contents

• UDS OSI Model
  • UDS Standards
  • Protocol Data Units (PDUs)
• Diagnostic Message
  • Diagnostic Request
  • Diagnostic Response
    • Positive Response Message
    • Negative Response Message
  • Negative Response Code
• Diagnostic Service
  • Service Identifier
    • Request Service Identifier
    • Response Service Identifier
  • DiagnosticSessionControl
  • ECUReset
  • ClearDiagnosticInformation
  • ReadDTCInformation
  • ReadDataByIdentifier
  • ReadMemoryByAddress
  • ReadScalingDataByIdentifier
  • SecurityAccess
  • CommunicationControl
  • Authentication
  • ReadDataByPeriodicIdentifier
  • DynamicallyDefineDataIdentifier
  • WriteDataByIdentifier
  • InputOutputControlByIdentifier
  • RoutineControl
  • RequestDownload
  • RequestUpload
  • TransferData
  • RequestTransferExit
  • RequestFileTransfer
  • WriteMemoryByAddress
  • TesterPresent
  • SecuredDataTransmission
  • ControlDTCSetting
  • ResponseOnEvent
  • LinkControl
• Addressing
  • Physical Addressing
    • Response behaviour to physically addressed request
  • Functional Addressing
    • Response behaviour to functionally addressed request
• UDS Communication Model
  • Client
    • Performance and Error Handling
  • Server
    • Performance and Error Handling
• UDS Time Parameters
  • Session Parameters
    • S3 _Client
    • S3_Server
  • Network Delays
    • △P2
    • △P6
  • Client Side Parameters
    • P2_Client
    • P2*_Client
    • P3_{Client_Phys}
    • P3_{Client_Func}
    • P6_Client
    • P6*_Client
  • Server Side Parameters
    • P2_Server
    • P2*_Server
    • P4_Server
• Packet (N_PDU)
  • Network Address Information
  • Network Data Field
  • Network Protocol Control Information
• Segmentation
  • Message Segmentation
  • Packets Desegmentation
• Diagnostics over CAN
  • CAN Frame
  • CAN Packet
    • Data Field
      • CAN Frame Data Padding
      • CAN Frame Data Optimization
    • CAN Packet Types
      • Single Frame
        • Single Frame Data Length
      • First Frame
        • First Frame Data Length
      • Consecutive Frame
        • Sequence Number
      • Flow Control
        • Flow Status
        • Block Size
        • Separation Time Minimum
  • CAN Addressing Formats
    • Normal Addressing
      • Normal Fixed Addressing
    • Extended Addressing
    • Mixed Addressing
      • Mixed Addressing with 11-bit CAN Identifier
      • Mixed Addressing with 29-bit CAN Identifier
  • Segmentation on CAN
    • Unsegmented message transmission
    • Segmented message transmission
  • Performance and Error Handling
    • N_As
    • N_Ar
    • N_Bs
    • N_Br
    • N_Cs
    • N_Cr
    • Unexpected Packet handling
      • Half-duplex
      • Full-duplex

See also

For an online course on UDS, visit https://www.kursyautomotive.pl/przedsprzedaz-diagnostyka-samochodowa-uds/

Currently available only in Polish (the author’s native language).