DoIP connection and transport testing
Test diagnostic discovery, routing activation, and TCP communication over Automotive Ethernet. Capture and review network behavior to identify where communication stops or deviates from the expected sequence.
Vehicle Diagnostics · DoIP Testing
Test and troubleshoot DoIP diagnostic communication
Systematic testing for DoIP discovery, routing activation, TCP communication, and UDS requests across Automotive Ethernet networks. The work focuses on isolating communication failures, validating expected responses, and producing evidence that your team can use for correction and regression testing.
Discuss a DoIP ProjectProblems I can investigate
Find the behavior behind the symptom
- 01
DoIP connection failure
Investigate cases where diagnostic discovery, routing activation, or TCP communication cannot be established. Testing can separate connection setup issues from later UDS communication behavior.
- 02
UDS request fails
Exercise diagnostic requests and compare observed responses with the expected behavior. Analysis can help isolate whether the issue is associated with DoIP transport, diagnostic session handling, or the requested service.
- 03
ECU not responding
Trace cases where an expected ECU does not answer diagnostic or network requests. The investigation uses available captures, test results, and reproduction steps to narrow the communication path requiring attention.
What I can help with
Focused engineering work in Vehicle Diagnostics
UDS request and session testing
Build repeatable checks for UDS requests, diagnostic sessions, routine control, security access, DTCs, and DIDs over DoIP. Results distinguish transport behavior from ECU diagnostic responses without assuming an unverified root cause.
Automated diagnostic test development
Develop executable diagnostic checks and repeatable analysis flows with CANoe and CAPL. Where relevant, test behavior associated with a DCM implementation and document the observed results.
Evidence-led failure analysis
Correlate PCAP evidence with test execution and the reported symptom to narrow connection, response, and ECU communication issues. Findings remain tied to the available inputs and reproducible observations.
What to send
Start with the evidence you already have
ECU
The ECU available for communication or testing, including the setup and access conditions needed for the agreed test scope.
ODX
Available diagnostic-data descriptions used to interpret supported diagnostic requests and responses.
PDX
A packaged exchange containing the ODX diagnostic data available for the investigation or test implementation.
PCAP
Packet captures containing relevant network traffic, preferably with enough surrounding activity to reproduce the reported behavior.
Problem description
Observed symptoms, context, reproduction steps, and expected behavior for the DoIP or UDS issue.
How the analysis works
From recorded data to engineering findings
- 01
Define the communication scope
Review the ECU, diagnostic data, problem description, and available PCAP evidence. Confirm the DoIP connection path, expected diagnostic behavior, and the cases that need to be reproduced.
- 02
Reproduce and capture behavior
Run focused checks for discovery, routing activation, TCP communication, and UDS requests. Record the observed sequence and separate connection failures from ECU response issues.
- 03
Analyze the failing case
Compare expected and observed behavior across the relevant diagnostic session, DTC, DID, routine control, or security access activity. Use evidence from the test execution and packet capture rather than assuming the cause.
- 04
Implement repeatable checks
Convert confirmed observations into automated tests or a focused diagnostic application where that is useful for continued troubleshooting and regression testing.
- 05
Document findings and handover
Deliver the agreed software or analysis with test scope, reproduction conditions, observed behavior, and remaining uncertainties clearly recorded.
What you receive
Deliverables matched to the investigation
Diagnostic application
Software for executing and interpreting the agreed ECU diagnostic services over the available DoIP communication path.
Automated test suite
Executable tests with setup, assertions, and repeatable results for the agreed connection and diagnostic cases.
Engineering analysis
A documented technical analysis with evidence, reproduced observations, investigated communication paths, and findings that distinguish confirmed behavior from open questions.
Technologies & formats
Automotive data and analysis environments
- DoIP
Diagnostics over Internet Protocol
Diagnostic transport over IP networks as defined by ISO 13400.
- UDS
Unified Diagnostic Services
ISO 14229 diagnostic services for communicating with vehicle ECUs.
- Automotive Ethernet
Automotive Ethernet
Automotive physical and data-link networking based on Ethernet.
- PCAP
Packet Capture
A captured sequence of network packets with timestamps and headers.
- ISO-TP
ISO 15765-2 Transport Protocol
A segmented transport protocol for messages carried over CAN.
- DTC
Diagnostic Trouble Code
A coded diagnostic record identifying a detected fault condition.
- DID
Data Identifier
A UDS identifier addressing diagnostic data exposed by an ECU.
- Diagnostic Session
Diagnostic Session
An ECU diagnostic operating mode controlling service availability and timing.
- Routine Control
Routine Control
The UDS service used to start, stop, or request results from ECU routines.
- Security Access
Security Access
A diagnostic challenge-response mechanism that unlocks protected ECU services.
- CANoe
Vector CANoe
A development, simulation, test, and analysis environment for vehicle networks.
- CAPL
Communication Access Programming Language
Vector event-driven language for network simulation, testing, and automation.
- DCM
Diagnostic Communication Manager
The Classic AUTOSAR basic-software module handling diagnostic communication.
FAQ
Practical questions before an investigation
- What DoIP problems can this service investigate?
- The service covers diagnostic discovery, routing activation, TCP communication, failed UDS requests, and cases where an expected ECU does not respond. The exact scope depends on the available ECU, diagnostic data, captures, and reproduction steps.
- Can you test UDS services over DoIP?
- Yes. The test scope can include UDS requests involving diagnostic sessions, DTCs, DIDs, routine control, and security access when the required behavior and access conditions are available.
- Can existing PCAP files be used?
- Yes. PCAP files can provide evidence of the network sequence and help compare a failing case with the expected communication path. Reproduction on an ECU may still be needed to confirm behavior.
- What is needed to start?
- Provide the ECU, available ODX or PDX data, relevant PCAP files, and a problem description with symptoms, reproduction steps, and expected behavior. The initial review defines the practical test scope.
Discuss the evidence
Discuss a DoIP Project
Share the ECU context, diagnostic data, captures, and observed symptoms to scope a focused DoIP testing or troubleshooting engagement.