"Black Box" information retention?

I've heard many conflicting stories and I'm hoping someone here knows a
little more definitively.

I am looking to find out if the "Black Box" on my Honda can retain
information from a ceratin date a few months ago.

(The car was involved in an accident, and has been repaired and driven
since....)

How long does the box retain the data?

Thanks for your help.

"Dan the man...." > wrote in
:

> I've heard many conflicting stories and I'm hoping someone here knows a
> little more definitively.
>
> I am looking to find out if the "Black Box" on my Honda can retain
> information from a ceratin date a few months ago.
>
> (The car was involved in an accident, and has been repaired and driven
> since....)
>
> How long does the box retain the data?
>
> Thanks for your help.
>
>
>


It's a FIFO system. Stores something like 2 hours of data. I forget exactly
how much.


--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

Tegger wrote:
> "Dan the man...." > wrote in
> :
>
>> I've heard many conflicting stories and I'm hoping someone here knows a
>> little more definitively.
>>
>> I am looking to find out if the "Black Box" on my Honda can retain
>> information from a ceratin date a few months ago.
>>
>> (The car was involved in an accident, and has been repaired and driven
>> since....)
>>
>> How long does the box retain the data?
>>
>> Thanks for your help.
>>
>>
>>
>
>
> It's a FIFO system. Stores something like 2 hours of data. I forget exactly
> how much.
>
>

obd0 = zero
obd1 = 30 secs

i think obd2 varies depending on year and manufacturer, but the info is
supposed to be pretty much comprehensive for anything the computer
controls and covers an extensive period.

jim beam > wrote in
t:


>
> obd0 = zero
> obd1 = 30 secs
>
> i think obd2 varies depending on year and manufacturer, but the info
> is supposed to be pretty much comprehensive for anything the computer
> controls and covers an extensive period.
>


The data recorder ("black box") is independent of the ODB system. It
records stuff like seat belt usage, air bag deployment, car speed and
engine RPM.

Automakers are beginning to add "black boxes" to their cars as protection
against liability and fraudulent warranty claims.

--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

Tegger wrote:
> jim beam > wrote in
> t:
>
>
>> obd0 = zero
>> obd1 = 30 secs
>>
>> i think obd2 varies depending on year and manufacturer, but the info
>> is supposed to be pretty much comprehensive for anything the computer
>> controls and covers an extensive period.
>>
>
>
> The data recorder ("black box") is independent of the ODB system. It
> records stuff like seat belt usage, air bag deployment, car speed and
> engine RPM.
>
> Automakers are beginning to add "black boxes" to their cars as protection
> against liability and fraudulent warranty claims.
>
that's very recent. prior to that, data recording is done by the ecu.

Tegger > wrote in
:

> jim beam > wrote in
> t:
>
>
>>
>> obd0 = zero
>> obd1 = 30 secs
>>
>> i think obd2 varies depending on year and manufacturer, but the info
>> is supposed to be pretty much comprehensive for anything the computer
>> controls and covers an extensive period.
>>
>
>
> The data recorder ("black box") is independent of the ODB system. It
> records stuff like seat belt usage, air bag deployment, car speed and
> engine RPM.
>
> Automakers are beginning to add "black boxes" to their cars as
> protection against liability and fraudulent warranty claims.
>


Having typed the above, I remember now that I read once (not online) that
the black box actually holds more like a minute to five minutes of engine-
running time.

The automakers are interested only in the events immediately prior to,
and during, a collision or mechanical failure.

--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

jim beam > wrote in
t:

> Tegger wrote:
>> jim beam > wrote in
>> t:
>>
>>
>>> obd0 = zero
>>> obd1 = 30 secs
>>>
>>> i think obd2 varies depending on year and manufacturer, but the info
>>> is supposed to be pretty much comprehensive for anything the
>>> computer controls and covers an extensive period.
>>>
>>
>>
>> The data recorder ("black box") is independent of the ODB system. It
>> records stuff like seat belt usage, air bag deployment, car speed and
>> engine RPM.
>>
>> Automakers are beginning to add "black boxes" to their cars as
>> protection against liability and fraudulent warranty claims.
>>
> that's very recent. prior to that, data recording is done by the ecu.
>


I'm not sure the data I list above was ever recorded by the ECU. That's why
they started installing "black boxes" in the first place.

--
Tegger

The Unofficial Honda/Acura FAQ
www.tegger.com/hondafaq/

Tegger wrote:
> jim beam > wrote in
> t:
>
>> Tegger wrote:
>>> jim beam > wrote in
>>> t:
>>>
>>>
>>>> obd0 = zero
>>>> obd1 = 30 secs
>>>>
>>>> i think obd2 varies depending on year and manufacturer, but the info
>>>> is supposed to be pretty much comprehensive for anything the
>>>> computer controls and covers an extensive period.
>>>>
>>>
>>> The data recorder ("black box") is independent of the ODB system. It
>>> records stuff like seat belt usage, air bag deployment, car speed and
>>> engine RPM.
>>>
>>> Automakers are beginning to add "black boxes" to their cars as
>>> protection against liability and fraudulent warranty claims.
>>>
>> that's very recent. prior to that, data recording is done by the ecu.
>>
>
>
> I'm not sure the data I list above was ever recorded by the ECU.

the data i listed is though.


> That's why
> they started installing "black boxes" in the first place.
>

original reason was a manufacturer legacy of product development and
testing. then law enforcement became interested. the rest is history.

Tegger wrote:
> Tegger > wrote in
> :
>
>> jim beam > wrote in
>> t:
>>
>>
>>> obd0 = zero
>>> obd1 = 30 secs
>>>
>>> i think obd2 varies depending on year and manufacturer, but the info
>>> is supposed to be pretty much comprehensive for anything the computer
>>> controls and covers an extensive period.
>>>
>>
>> The data recorder ("black box") is independent of the ODB system. It
>> records stuff like seat belt usage, air bag deployment, car speed and
>> engine RPM.
>>
>> Automakers are beginning to add "black boxes" to their cars as
>> protection against liability and fraudulent warranty claims.
>>
>
>
> Having typed the above, I remember now that I read once (not online) that
> the black box actually holds more like a minute to five minutes of engine-
> running time.
>
> The automakers are interested only in the events immediately prior to,
> and during, a collision or mechanical failure.
>

not necessarily. manufacturers are interested in driving habits and 5
mins isn't sufficient for that. law enforcement is /definitely/
interested in habit. if data analysis says you're an habitual speeder,
late braker, and all-around madman, they want to throw the book at
you. if your habit is law abiding, but you got in a fender bender, they
won't bother. word is that insurance companies are interested in
driving habit data too. imagine that!

>>> obd0 = zero
>>> obd1 = 30 secs

> Having typed the above, I remember now that I read once (not online) that
> the black box actually holds more like a minute to five minutes of engine-
> running time.
>
> The automakers are interested only in the events immediately prior to,
> and during, a collision or mechanical failure.\

Well again, the question comes forth...how far back is the information about
a crash retrievable?

If I wanted to access crash information from a day in the summer...would it
still be there?

Does it hold that information indefinitely...until the next crash? ...until
you drive it again? ??

Thanks for your help!