DIY-EFI Lurkers & furthermore :-)

[Terry Martin]

Mike Turner wrote:
> 
> Please define DERM (Delco Electronics Runs Motor? :-) ).
> At little explanation of pre-crash mode would help, too. TIA.

That's pretty much a true statement too, but it's Diagnostic Energy
Reserve Module, read SIR controller. Pre-crash mode is a little bit of
fun that is when the "arming sensor" on the high side of the deployment
loop, closes at low level velocity changes and powers the loop with a
trickle current connected directly to the 36V loop reserve of the DERM,
insuring the inflator modules are directly energized from the reserve
capacitor when a "discriminating sensor" closes, (14 mph frontal impact
no more than 30 degrees off the centerline of most vehicles, blowing the
airbag in under 1/20 sec, which means it expands toward your face at
200mph, with +/-2600psi.) 

Don't you feel better now, knowing that your DERM equipped vehicle not
only spies on your driving habits, it plays with the detonators by
powering them up "a little bit" just to be sure it can pound you in the
face at will with approximately the best punch Mohammed Ali ever threw.
If you ever pile up your car, there is almost nothing these quaint
little devices don't know about it, and you will be appropriately
spanked.

Terry