43IT analyzes ECU firmware and calibrations in diesel vehicles to identify, explain and document emissions-relevant software strategies for legal proceedings.

We are particularly useful where external measurements alone are insufficient and the legally relevant question must be answered inside the engine control unit itself.

What we analyze

• Exhaust Gas Recirculation (EGR)
• Diesel Particulate Filter (DPF)
• Selective Catalytic Reduction (SCR)
• Lean NOx Trap / Lean Nitrogen Trap (LNT)
• Injection, heating strategies and thermal management
• Oil-quality models, aging models and diagnostic logic
• Pre-update/post-update differences
• Calibrations, maps, thresholds and state logic

Typical questions

• Which ECU functions affect emissions control?
• Under which temperature, time, mileage, altitude or driving conditions does a strategy become active?
• Is behavior different in test, real-driving or customer-use conditions?
• What role do software updates or variant versions play?
• How can a firmware finding be supported by measurements, diagnostic data or vehicle testing?

Output for proceedings

Our findings are documented so that lawyers, other experts and courts can follow the technical reasoning. Deliverables include

• Technical reports and diagrams
• Function descriptions and data-flow analysis
• Comparison tables with affected variants and software versions
• Input for disclosure requests
• Proposals for measurements and vehicle testing
• Test data analysis and interpretation
• Support for expert meetings or hearings.

We distinguish carefully between observed implementation, technical effect and legal assessment.