"Black Box" information retention?

------------------------------

Yes, the info would still be there if the vehicle has not been powered
up since the crash. There would be x minutes of data available.

You said the car has been driven since. If the 'black box' is in the
car, the data is now gone.



'Curly'

 

From what I understand and have read, the information is very short-lived.
If you've driven the car more than a few minutes since the summer, summer's
information is long gone.

I have asked these questions of somebody I know who is in the trade. If I
get a response, I will post the results here.

 

From what I understand and have read, the information is very short-lived.
If you've driven the car more than a few minutes since the summer, summer's
information is long gone.

I have asked these questions of somebody I know who is in the trade. If I
get a response, I will post the results here.

 

reminds me of the joke about Bubba.

the black box was set up to record voices just before a collision.

Bubba's last words were 'Hold this beer and I'll show you a trick'.

From what I understand and have read, the information is very short-lived.
If you've driven the car more than a few minutes since the summer, summer's
information is long gone.

I have asked these questions of somebody I know who is in the trade. If I
get a response, I will post the results here.

 

reminds me of the joke about Bubba.

the black box was set up to record voices just before a collision.

Bubba's last words were 'Hold this beer and I'll show you a trick'.

From what I understand and have read, the information is very short-lived.
If you've driven the car more than a few minutes since the summer, summer's
information is long gone.

I have asked these questions of somebody I know who is in the trade. If I
get a response, I will post the results here.

 

I've got some answers:

1) The info is stored by the SRS computer, not the engine's ECU.

2) The SRS computer stores a "snapshot" of the final state of all the
inputs when the engine was stopped for the last time.

3) The SRS computer also stores about 15 seconds of real-time data
immediately prior to the last engine stoppage.

4) Dealership employees and techs are not able to access the info
stored. This is only accessible by Honda.

I have just asked when they started storing this info.

 

I've got some answers:

1) The info is stored by the SRS computer, not the engine's ECU.

2) The SRS computer stores a "snapshot" of the final state of all the
inputs when the engine was stopped for the last time.

3) The SRS computer also stores about 15 seconds of real-time data
immediately prior to the last engine stoppage.

4) Dealership employees and techs are not able to access the info
stored. This is only accessible by Honda.

I have just asked when they started storing this info.

 

If by "black box" you are referring to the SRS (supplemental restraint system)
Unit.

The answer is YES. Yes the SRS unit does store limited data, but only at the
time of a deployment event.

Dealers can only access DTCs with their scan tool, and nothing else (as related
to deployment events.)

Any Honda/Acura SRS Unit that can store DTCs, can and will store "deployment"
DTC(s) at the time of deployment. This event data only records at the time, of
a deployment.

The SRS Unit does not know the date, time, or speed of the vehicle, at the time
of deployment. What it does know and record, in permanent memory, is which
seat belt was buckled, vehicle deceleration rate (in ms), which airbags,
buckles or belt tensioners deployed.

Cars with OPDS, SWS or ODS might also record front passenger weight (SWS/ODS),
and front passenger position (OPDS/ODS), at the time of the deployment.

So, in conclusion, no deployment, no data stored.

--
Tp,

-------- __o
----- -\<. -------- __o
--- ( )/ ( ) ---- -\<.
-------------------- ( )/ ( )

 

If by "black box" you are referring to the SRS (supplemental restraint system)
Unit.

The answer is YES. Yes the SRS unit does store limited data, but only at the
time of a deployment event.

Dealers can only access DTCs with their scan tool, and nothing else (as related
to deployment events.)

Any Honda/Acura SRS Unit that can store DTCs, can and will store "deployment"
DTC(s) at the time of deployment. This event data only records at the time, of
a deployment.

The SRS Unit does not know the date, time, or speed of the vehicle, at the time
of deployment. What it does know and record, in permanent memory, is which
seat belt was buckled, vehicle deceleration rate (in ms), which airbags,
buckles or belt tensioners deployed.

Cars with OPDS, SWS or ODS might also record front passenger weight (SWS/ODS),
and front passenger position (OPDS/ODS), at the time of the deployment.

So, in conclusion, no deployment, no data stored.

--
Tp,

-------- __o
----- -\<. -------- __o
--- ( )/ ( ) ---- -\<.
-------------------- ( )/ ( )

 

further reading:
http://www.vehicle-info.com/articles.php?id=22

now imagine your onstar "driver assistance" system phoning home your,
er, "driving habits" to your insurance company, complete with gps
coordinates in real time....

also:
http://www.harristechnical.com/cdr5.htm

 

further reading:
http://www.vehicle-info.com/articles.php?id=22

now imagine your onstar "driver assistance" system phoning home your,
er, "driving habits" to your insurance company, complete with gps
coordinates in real time....

also:
http://www.harristechnical.com/cdr5.htm

 

---------------------------

Slightly OT, but I've heard of rental agencies handing the customer a
big 'surcharge' for breaking the TERMS & CONDITIONS of the rental
agreement for driving the vehicle like it was stolen. (the GPS tracking
flagged them). They apparently thought they could bet from 'A' to 'B' at
the speed of a rented jet.

'Curly'

 

---------------------------

Slightly OT, but I've heard of rental agencies handing the customer a
big 'surcharge' for breaking the TERMS & CONDITIONS of the rental
agreement for driving the vehicle like it was stolen. (the GPS tracking
flagged them). They apparently thought they could bet from 'A' to 'B' at
the speed of a rented jet.

'Curly'

 

well, you /could/ do this with an individual's cell phone too. or
credit card as you buy fuel along the freeway. or use license plate
reading cameras every few miles. or have a transponder in every license
plate and sensors in the road. in fact, there are already sensors in
the road in many places. you know where there are two rings in the lane
one after the other? those are used to sense average vehicle speeds and
density, and thus manage traffic flow. putting a transponder in the
license plate and having it talk to one of those speed sensors as you
drive over it is trivial. automatic ticket issuance is more trivial still.

 

well, you /could/ do this with an individual's cell phone too. or
credit card as you buy fuel along the freeway. or use license plate
reading cameras every few miles. or have a transponder in every license
plate and sensors in the road. in fact, there are already sensors in
the road in many places. you know where there are two rings in the lane
one after the other? those are used to sense average vehicle speeds and
density, and thus manage traffic flow. putting a transponder in the
license plate and having it talk to one of those speed sensors as you
drive over it is trivial. automatic ticket issuance is more trivial still.

 

I often wonder if those double sensor loops are used to change an upcoming
light to red if you're exceeeding the speed limit. It's possible.
And all they need is to add a camera to get your lic.plate number as you
trip the sensors at SL+ xMPH.Then you get a ticket in the mail.
No need for any transponders in your car.(or the transponder microchip
could be in the plate itself,in the sticker,or a reflective barcode read by
a laser scanner.)

 

I often wonder if those double sensor loops are used to change an upcoming
light to red if you're exceeeding the speed limit. It's possible.
And all they need is to add a camera to get your lic.plate number as you
trip the sensors at SL+ xMPH.Then you get a ticket in the mail.
No need for any transponders in your car.(or the transponder microchip
could be in the plate itself,in the sticker,or a reflective barcode read by
a laser scanner.)