Re: "Black Box" information retention?

Tegger wrote:
> motsco_ <motsco_@[EMAIL PROTECTED]
> wrote in
> news:13gnjf23lnbgqf8@[EMAIL PROTECTED]
 
> 
>> Rob wrote:
>>>>>> 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!
>> ------------------------------
>>
>> 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.
>>
>>
> 
> 
> 
> 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) Dealer****p 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.
> 
> 
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