Automotive diagnostic software development

Explain the role of the ISO-TP (ISO 15765-2) transport layer in diagnostic communication

Differentiate between ISO-TP frame types: SingleFrame, FirstFrame, ConsecutiveFrame, and FlowControl

Segment a diagnostic message exceeding single frame capacity into multiple ISO-TP frames

Configure and interpret Flow Control parameters: BlockSize (BS), SeparationTime (STmin), and FlowStatus (FS)

Apply ISO-TP timing parameters (N_As, N_Bs, N_Cs) and handle timeout scenarios

Distinguish between Normal, Extended, and Mixed ISO-TP addressing modes

Design test cases for ISO-TP edge cases, including flow control errors and timing violations

Construct UDS request and response message structures (SID, Sub-function, Parameters)

Distinguish between UDS positive and negative responses, including the role of the Suppress Positive Response bit

Interpret common Negative Response Codes (NRCs) to diagnose communication failures

Apply UDS physical and functional addressing for targeted and broadcast requests

Describe the purpose and application of the TesterPresent (0x3E) service to maintain diagnostic sessions

Analyze and configure UDS server timing parameters, including P2 and P2* timeouts

Describe UDS diagnostic session types (Default, Programming, Extended) and their purposes

Implement session transitions using the DiagnosticSessionControl (0x10) service

Apply the ECUReset (0x11) service and select appropriate reset types for different scenarios

Explain the UDS SecurityAccess (0x27) seed-and-key mechanism to unlock protected functions

Execute the full SecurityAccess sequence: request seed, compute key, and send key

Map security access levels to session types and service permissions in a diagnostic specification

Design test cases to validate session and security state transitions and access rules

Explain the purpose and structure of Data Identifiers (DIDs) for reading and writing ECU data

Implement ReadDataByIdentifier (0x22) requests for single and multiple DIDs

Utilize WriteDataByIdentifier (0x2E) to configure ECU parameters

Apply ReadMemoryByAddress (0x23) and WriteMemoryByAddress (0x3D) for low-level memory access

Configure ReadDataByPeriodicIdentifier (0x2A) for continuous data monitoring

Use DynamicallyDefineDataIdentifier (0x2C) to create custom data sets for efficient reading

Design a test plan for validating data services, including positive paths and NRCs for incorrect access attempts

Decode the structure of a Diagnostic Trouble Code (DTC) and its status byte

Interpret the meaning of individual bits within the DTC status byte (e.g., testFailed, confirmedDTC)

Use ReadDTCInformation (0x19) with its various sub-functions to retrieve fault information

Retrieve and interpret DTC Snapshot (Freeze Frame) and Extended Data records

Apply the ClearDiagnosticInformation (0x14) service to erase fault memory

Outline a strategy for ECU DTC monitoring, including event detection, status transitions, and aging policies

Develop test cases for DTC reporting, including setting faults and verifying clear operations

Implement InputOutputControlByIdentifier (0x2F) to control ECU actuators and outputs

Apply I/O control options: returnControlToECU, resetToDefault, freezeCurrentState, and shortTermAdjustment

Implement RoutineControl (0x31) to start, stop, and query the results of predefined ECU routines

Differentiate the use cases for I/O Control versus Routine Control services

Design and test a control sequence combining session, security, and I/O or Routine services

Define safety prerequisites and timeout handling for remote control operations in a system specification

Outline the complete UDS ECU reprogramming sequence, including all prerequisites and state transitions

Implement RequestDownload (0x34) to initiate a flash programming session

Use TransferData (0x36) with correct block sequence counter management to send software data

Apply RequestTransferExit (0x37) to finalize the data transfer process

Implement checksum verification to ensure the integrity of the transferred software

Design an ECU flash programming state machine for a bootloader application

Develop a comprehensive test plan for the ECU reprogramming sequence, covering success and failure scenarios

Describe the purpose of legislated OBD (OBD-II, EOBD, WWH-OBD) and its relation to UDS (ISO 14229)

Request and parse diagnostic data using legislated OBD modes and Parameter IDs (PIDs)

Retrieve and interpret legislated emission-related Diagnostic Trouble Codes

Evaluate OBD readiness monitors to verify emission system self-test completion

Map WWH-OBD (ISO 27145) services to their UDS equivalents

Describe ZEV-specific diagnostic parameters for electric and hybrid vehicles

Explain the purpose of network management (NM) in reducing power consumption in automotive systems

Describe the states and transitions of the AUTOSAR Network Management protocol

Explain how Partial Networking (PN) enables selective ECU activity to further optimize power

Analyze the interaction between diagnostic sessions (e.g., programming) and network management states

Implement ECU wake-up and sleep procedures in a Partial Networking environment

Design test cases to verify network management state transitions and partial networking behavior

Describe the Diagnostics over IP (DoIP) protocol architecture and its role in modern E/E architectures

Compare DoIP and CAN-based diagnostics, identifying use cases for each

Explain the UDS Authentication (0x29) service workflow for secure diagnostics

Describe the roles of certificates and challenge-response mechanisms in UDS Authentication

Outline a test strategy for DoIP vehicle discovery and diagnostic routing

Design a test concept for validating a UDS Authentication implementation

Design the high-level architecture of a UDS server, including a dispatcher, state machines, and service handlers

Model the data flow for processing a UDS request from reception to response transmission

Design the logic for a service dispatcher that performs SID lookup and prerequisite checks (session, security)

Implement the routing of a UDS request to the appropriate service handler function

Define a strategy for handling and prioritizing Negative Response Codes (NRCs) in the server

Design the data structures for a configurable DID and Routine database, including identifiers, data, and access rights

Integrate session, security, and NM state machines into a cohesive diagnostic server model