IT Forensics · Car

Forensic analysis of OBD-II diagnostic logs – Using the standardised vehicle diagnostic interface for forensic purposes

The OBD-II interface provides standardised access to specific vehicle control units and supplies, amongst other things, fault codes, operating parameters and, in some cases, historical vehicle data, which may be relevant for forensic analysis.

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The scope of data accessible via OBD-II is limited depending on the manufacturer and does not cover all the control units or memory areas present in the vehicle; it is therefore regarded as one of several possible data sources.

Why LanCologne?

Since its foundation, LanCologne has specialised in professional IT forensics. Our staff have decades of experience in the field of information technology and assist companies, solicitors, private individuals and, on a regular basis, the courts in the technical investigation of complex digital matters.

The examination is, as a matter of principle, carried out exclusively on a forensic copy, a forensic image or a data source captured in a technically equivalent manner that preserves the integrity of the evidence. The original evidence remains unchanged and is stored in a manner that preserves its integrity.

Our services

We retrieve diagnostic data accessible via the OBD-II interface, document the retrieval process in a manner that is forensically verifiable, and place the data obtained within the overall context of the vehicle inspection.

Typical areas of application

•Reading out fault codes and operating parameters
•Supplementing other vehicle data sources with standardised diagnostic values
•Initial technical assessment of a vehicle’s condition
•Support with the analysis of fault logs
•Judicial and non-judicial expert reports
•Collaboration with workshops and experts

How an OBD-II analysis works

Once a controlled connection has been established via the diagnostic interface, any available fault codes and operating parameters are read out and logged. The process is documented to ensure that any potential effects on the vehicle’s condition can be traced.

Why is OBD-II analysis relevant in a forensic context?

Fault codes accessible via OBD-II can provide initial important indications of technical faults or anomalies before a more in-depth analysis of the control units is carried out.

As a read operation may, under certain circumstances, itself affect the contents of the error log, every access is carefully documented.

Frequently Asked Questions

Can all of a vehicle’s control units be read via OBD-II?+
No, access is restricted to the systems authorised by the standard or the manufacturer.
Does reading data via OBD-II affect the vehicle’s condition?+
A read-only operation does not usually alter any data; however, the process is fully documented in order to provide verifiable evidence of this.
Is OBD-II available on all vehicles?+
Most passenger cars registered since the 2000s are fitted with a suitable interface; this is checked on a case-by-case basis for each vehicle.

LanCologne – Vehicle IT Forensics, Cologne

Do you require a professional forensic investigation into the „forensic analysis of OBD-II diagnostic logs"? LanCologne can assist you in securing digital evidence in a manner that stands up in court, as well as in the transparent analysis of relevant vehicle data.

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