When a Sunroof Becomes an OBD Compliance Issue

The California Air Resource Boared (CARB) requires transparent documentation of all emission-relevant components monitored by OBD.
But dependencies often cross domains – and are not always obvious.

Example: a sunroof. Normally just a comfort feature, yet it can block diesel particulate filter regeneration and directly affect emission diagnostics.

The emmtrix Dependency Analyzer (eDA) helps teams:

• Trace emission-related signal flows across ECUs
• Detect new signals introduced by updates
• Document dependencies across domains
• Integrate compliance checks into CI/CD

Our new use case shows how eDA ensures transparency and reliability for OBD compliance.