Thorn Consulting Services - Certified Accident Reconstructionist

Crash Data Retrieval (CDR) Services

Crash Data Retrieval (CDR) System by Bosch

Bosch CDR ModuleWhat is the CDR Tool?
The CDR Tool is a system made by Bosch to download the airbag control module data from various supported auto manufacturers’ vehicles after an airbag deployment or non-deployment event; hence, also the name or title of “Event Data Recorder (EDR)”.

Data Available?
Contrary to popular belief, the airbag control module (ACM) is not a “black box”.  The ACM will not tell a person everything a vehicle has ever done, tell who was driving, record voices, or show how a person was driving the vehicle the night before.  The ACM records certain vehicle data when the airbags deploy during a crash or when there is a non-deployment event that occurs that “wakes up” the system for one reason or another anticipating a deployment of the airbags.  Depending on which ACM is installed and the year of the vehicle, the Crash Data Retrieval (CDR) Tool can obtain vehicle speed, brake switch status, percent throttle, and engine speed for 5 seconds prior to impact, as well as the post-impact delta-V or change in speed.  The driver’s seatbelt circuit status, airbag warning lamp status, ignition cycles at deployment and since the accident, and some other data may also be recorded, again depending on the ACM used in each particular vehicle.

CDR Crash Summary

CDR Pre-crash Data

CDR Delta V

More Vehicles Added to Coverage!

Vehicle Coverage?
As of right now, certain Acura, BMW, Chrysler (FCA), Ford, GM, Honda, Lexus, Mazda, Nissan, Toyota, Daimler, Volkswagen, Audi, Infiniti, and Volvo vehicles, and other vehicle manufacturers have the ONLY readable modules using the Crash Data Retrieval (CDR) Tool.  To check the current list of all supported or readable vehicles by the Bosch CDR Tool, please click here.  This link will take you to the Crash Data Group website listing of all supported vehicles.  There are more vehicles coming soon as vehicle manufacturers comply with CFR49 Part 563 rule.

In August 2006, the National Highway Traffic Safety Administration (NHTSA) released it final ruling on vehicle event data recorders (EDR), 49 CFR Part 563.  Based upon its analysis, NHTSA estimated that by the year 2010, over 85% of vehicles would already have EDR’s installed in them.  NHTSA did not require vehicle manufacturers to install EDR’s in them, but did warn that if the EDR installation trend did not continue, they would revisit their decision and possibly make EDR’s a requirement in vehicles.  The final ruling did provide a minimum standard for the type of data that all EDR’s would be required to record, i.e. pre-crash speed, engine throttle, brake use, changes in longitudinal velocity (delta-v), and more.  Vehicle manufacturers have until September 1, 2012 to be in compliance with the original ruling. 

CDR Links & Other References
Need or want to be trained in the use of the CDR Tool?  Need or want to be trained in the CDR Tool Technician or Analyst Course?  The Collision Safety Institute (CSI) and Crash Data Specialists offers training in this area.

Thorn Consulting Services (TCS) is trained and certified in the use of the Crash Data Retrieval (CDR) Tool.  TCS has all the current updates and software to read Bosch CDR Tool supported vehicles.  If you need a particular supported vehicle module read, you can call TCS to have it done.  Contact us today for more information!

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