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I didn't know the Q50 had a black box

20K views 28 replies 11 participants last post by  Avedis53  
#1 ·
I'm sure some of you were already aware of this but I wasn't. The Q50 has a black box like an airplane that records vehicle system data in certain crash or crash-like situations, like an air bag deployment or hitting a road obstacle. Infiniti calls it their EDR (Event Data Recorder) as do other manufacturers. From what I can gather, it is different than the vehicle data transmission feature that you see pop up on your upper display on a monthly basis.

The EDR continuously records data related to vehicle dynamics and safety systems for the prior 30 seconds before a crash event and if power is still available, then writes that data to an EPROM.

Infiniti doesn't list everything that is recorded but does mention the following:

How the various systems in your vehicle were operating.
Whether the driver and passenger seat belts were fastened.
Accelerator and brake pedal positions.
Steering angle.
How fast the vehicle was traveling.

I would imagine that's just the tip of the iceberg as far as what is recorded. Older EDRs record 6-8 pages of data while newer EDRs include many more pages depending on the make/model/year. This data can only be accessed with special scanning tools (No OBD2 reader will do it). That data can and has been used by law enforcement and insurance agencies in court as part of crash investigations.

If you're thinking about disabling the EDR because you don't want Big Brother recording your nefarious driving habits, many states have made it criminal to disable EDRs. In addition, EDRs are typically part of the airbag/collision system and disabling the EDR can also disable the airbag system and cause the vehicle to throw an airbag malfunction light.

Infiniti states that "EDR data will only be accessed with the consent of the vehicle owner or lessee or as otherwise required or permitted by law." That makes me sleep well at night...
 
#4 ·
Major manufacturers like Ford and GM have had EDRs for at least the last 15 years. Infiniti has since 2012 and I believe they are made by Bosch. They are standard equipment on all cars now in the US from what I've read.

EDR data access is governed by the Driver Privacy Act.

"The federal Driver Privacy Act of 2015 was enacted on December 4, 2015. It stated that the owner or lessee of a motor vehicle is the owner of the data collected by the EDR. In order to access that data, an investigator would need to (1) be authorized by a court or judicial or administrative authority, subject to the standards for admission into evidence; (2) obtain the written, electronic or recorded audio consent of the vehicle owner or lessee; (3) be conducting an investigation or inspection authorized by federal law; (4) demonstrate it is necessary to facilitate medical care in response to a car accident; or (5) be conducting traffic safety research, so long as the personal information of the owner/lessee is not disclosed."
 
#9 ·
A feel good story (except for the kid). As much as I like and support law enforcement, bad cops are the lowest of the low! They are granted great power. When they betray that trust, I can't say here what I think should be done to them.
 
#2 ·
I've been aware of it though not really captured my interest. I know this kind of system doesn't record / log data full-time but only certain amount data for X number of seconds and when only triggered by certain condition or event - just like a motion / sound detection feature of a camera, for instance. Those trigger conditions are unknown (at least to me) but I would guess speed is one of them. Then again, I'm sure it just overwrites the previously recorded data.
 
#5 ·
Wasn't certain but I am not at all surprised. That info is a double edged sword. It can be of help in a collision, or not.
 
#29 ·
I should have been more concise about EDRs. While there may have been rudimentary EDRs in Nissans before 2012, the ability to extract and translate usable data from them hadn't been standardized. Nissan (and Infiniti) vehicles manufactured before 2012 are considered "non-CDR" vehicles as their data can not be downloaded by the Bosch/Vetronix CDR (Crash Data Retrieval) system. That Bosch CDR system is the industry standard for vehicle crash investigators and if the vehicle in question is outside the Bosch CDR application set, the crash investigators won't pursue EDR data retrieval as the data can be incomplete or incompletely translated.

No doubt Nissan has their own proprietary data retrieval tools that can access their non-CDR vehicle's data but it can be compromised when provided to other parties because of the same reasons I listed above.

So technically, you are correct but from a litigation standpoint, any resultant translation and interpretation of EDR data must be stated with reasonable engineering certainty and must meet clear tests before they are admissible in court. Non-CDR vehicle data could be considered compromised if the data retrieval is incomplete or incompletely translated by retrieval tools as stated above. So, in essence, pre-2012 Nissan/Infiniti EDR data isn't considered as reliable as post-2012 EDR data.
 
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