Messerschmidt and Austin to Present at the 2012 ARC-CSI Crash Conference

Kelly Messerschmidt
Technical Communications Manager

Bill Messerschmidt of MSC, and Tim Austin of the Wisconsin State Patrol Academy will give a presentation on “Using ECM Diagnostic Data in Crash Reconstruction” at the 2012 ARC-CSI Crash Conference, which will take place June 4-7, in Las Vegas, Nevada.

Messerschmidt and Austin’s presentation explores the presence of important, volatile fault data in heavy vehicle Engine Control Modules (ECMs) that are oftentimes ignored, inadvertently erased, or overwritten during the ECM data imaging process.

They will discuss how and when diagnostic records are written, how they can be useful in collision investigations, as well as how the data can be preserved correctly. Messerschmidt and Austin will describe data imaging methods, such as the use of surrogate vehicles and devices like the “Truck in a Box.”

The ARC-CSI Crash Conference takes place annually and—as they have done for the past 10 years—the ARC-CSI Crash Team will conduct multiple, fully instrumented live crash tests of vehicles in real world crash scenarios. Learn more about the crash tests.

The two days that follow crash test day are comprised of technical presentations given by experts from around the world on topics relevant to investigating and reconstructing vehicle collisions. Learn more about the topics and speakers for the 2012 ARC-CSI Crash Conference.

Register to attend this year’s conference.

How to Interpret Heavy Vehicle EDRs, Day 2

William Messerschmidt
Principal Technical Analyst 

The second day of Tulsa University CESE's class on HVEDR data begins the focus on specific engine manufacturers.

This morning, Ron Baade discussed and demonstrated the ECM and EDR data in Detroit Diesel and Mercedes Benz engines, including DDEC IV - DDEC 10, and the 2001 - 2008 MBE engines.

During the afternoon, I taught the section on Cummins ECMs, beginning with the 2002 ISX and ISM heavy duty engines, through the CM2250 and CM2150 EPA 2010 engines. Topics included data limitations, the effects of power failure, anomalies that have been found in the data, fault data (diagnostic trouble codes), and case studies.

In the evening, Ron, Jeremy Daily, and I went to Melton Trucking and began to prep the test trucks for tomorrow's testing. The trucks will include two 2012 Kenworths, and a 2012 Freightliner. In tomorrow's class, Dr. Daily will be presenting more information and examples of CAN data.

SAE EDR Symposium: Day 2, Session 2

Bill Messerschmidt
Manager, MSC 

The second session today is "Commercial Vehicle Original Equipment Manufacturer (OEM) (and Supplier) Perspectives," with speakers from Daimler Trucks, Volvo Trucks, Navistar, and Meritor Wabco.

The first speaker is Paul Menig from Daimler Trucks North America. Mr. Menig is discussing Safety from Start to Finish. He points out that a heavy vehicle has approximately 10 computers (engine, transmission, ABS, and so on). He points out that the general trend in the trucking industry has been for new technology to begin as an aftermarket option and then move toward greater integration (prep package, pre-delivery) until it becomes an OE factory option.

The next speaker is Timothy LaFon from Volvo Trucks North America. Mack and Volvo are headquartered in Greensboro, NC. The major control units on these vehicles are ABS, Airbags, Electronic Stability Control (ESC), EECU and VECU (Engine and Vehicle Electronic Control Units, respectively). There is also a light control module. He points out that ECUs were not developed for accident or crash investigations, and that physical data need to be considered as well as electronic data.

Beginning in 2002, Volvo does have "freeze frame" data associated with fault codes. Mr. LaFon announced that Volvo DOES HAVE INCIDENT LOGGING. The Volvo EDR, which begins in 2010, has two events: one associated with a Last Stop and one associated with a wheel speed trigger of 10mph/sec. There is one fault associated with VECU faults and one with EECU faults. These have 60 seconds of pre-event and 30 seconds of post-event data at 4Hz.

Airbag control units can be downloaded but need to be sent back to Europe. ABS and ESC systems should be downloaded by the supplier (e.g., Bendix or Wabco).

THIS IS THE FIRST OFFICIAL, PUBLIC ANNOUNCEMENT FROM VOLVO THAT THEIR TRUCKS HAVE AN EDR.

As of now, Mr. LaFon states that all Volvo VECU/EECU downloads must be handled by Tim Cheek (Delta-V Forensic Engineers) or John Steiner (KEVA Engineering). Mr. LaFon states that the reason for this is that they (Volvo) have concerns about data accuracy, evidence spoliation, and that Volvo has no method for selling the EDR Retrieval Tools to the public.

I think it's worth pointing out here that the engineering, research, and crash investigation community have successfully dealt with these very same issues with the other engine manufacturers' EDRs, including self-funding dozens and dozens of research papers over (literally) decades in light vehicle and heavy vehicle EDRs. Ironically, most of that research has been published though SAE.

The third speaker is Alan Korn from Meritor Wabco. Mr. Korn is describing the data monitoring system that Meritor Wabco offers called Safety Direct. This system can monitor and record driver behavior and alert a safety manager of aggressive driving. Safety Direct monitors and records events (10 seconds before and after), and can include video. It can be downloaded directly from the vehicle or it can be uploaded by a telematics system.

The final presentation in this group is from Eric Swenson of Navistar. Mr. Swenson is discussing the electrical, mechanical, space, and power requirements for a J2728-compliant HVEDR.

Visit SAE's page to learn more about the speakers. View the Event Guide for the SAE 2011 Highway Vehicle EDR Symposium (pdf).

SAE EDR Symposium: Day 1, Session 4

Bill Messerschmidt
Manager, MSC 

The last session of a great day in Danville, Virginia, is on standards development, beginning with SAE J1698, SAE J2728, and International Standards Organization (ISO) Activity.

The first speaker is Brian Everest, speaking on the objectives of the light vehicle Event Data Recorder (EDR) Standards Committee. The updated Standard will address the data, the tool, and the extraction. There are five task forces, focusing on: 1) updating the text and definitions to be current with new and future technology; 2) defining new future parameters and technologies (like brake pedal position!); 3) tamper resistance, physical integrity, and standard data retrieval communications; 4) recommended practices for any tool used for accessing the EDR; 5) ensuring data integrity.

That's a lot of beneficial work!

The next speaker is Carl Munch, speaking on test protocols for compliance with Part 563. This is the part of the committee's work that will ensure that data from EDRs are recorded and reported accurately, including synchronizing the parameters. The committee has looked at reporting of longitudinal delta v, max delta v, and time to max delta v.

The third speaker is Lee Lackey, from Noregon Systems, discussing the J2728 committee. This committee has developed the Standard for HVEDRs. There were four main groups in Tier 1, which is the first stage of the Standard: data definitions, data extraction, data file format, and event triggers. There were also groups for performance specs and survivability, which come into play more in Tier 2 than in Tier 1.

The J2728 Standard has 16 Header parameters, 1 Footer parameter, and 20 data elements. The data will be output into a CSV file that can be validated, and requires EDRs to have sufficient reserve power to write data in the event of a complete power failure. At this point, the Standard is in the final stages of meeting some requests from the NTSB.

The last speaker of the day is Joseph Marsh, from Ivy Consultancy, describing the International Standards Organization's activity with EDRs. These are under TC22 / SC 12 / WG7, the Traffic Accident Analysis Methodology group. This is mostly concerning the collection of aggregate EDR data.

This was an excellent day--very much worth the time and money. I'm looking forward to tomorrow!

Visit SAE's page to learn more about the speakers. View the Event Guide for the SAE 2011 Highway Vehicle EDR Symposium (pdf).

SAE EDR Symposium: Day 1, Session 2

Institute Conference Center, Danville, VA

Bill Messerschmidt
Manager, MSC 

The second session is Passenger Car Original Equipment Manufacturer (OEM) Event Data Recorders (EDRs). The first speaker is James Engle from Ford. His presentation is an overview of the Ford EDR systems (powertrain control module, restraint control module). He is discussing how Ford EDRs are changing to become Part 563 compliant. The most notable change from a crash investigation standpoint is that data won't be recorded on the PCM anymore.

Next speakers are from Chrysler: Lisa Fodale & James Bielenda. Ms. Fodale is describing the three phases of Chrysler EDRs (Phase 1: 2005-2007MY, Phase 2: 2008-2009MY, Phase 3: 2010-2012). She's provided a really good, succinct summary of the increasing amount of data supported in these EDRs. Mr. Beilenda provided a great segment on numerous applications of Chrysler EDRs.

Both sections were great summaries of where these two manufacturers are with EDRs and Part 563 compliance.