VSS

[peter paul fenske]

Hi Bruce

Forgot to mention the standard VSS input for most apps
is a zero crossing detector. You need a A.C. signal to trigger
it..

:peter

At 11:06 AM 8/12/98 -0400, you wrote:
>
>-----Original Message-----
>From: TBK <terryk at foothill.net>
>To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
>Date: Wednesday, August 12, 1998 10:52 AM
>Subject: Re: VSS
>
>
>>I've driven my 7730 with an oscillator at about 10V pk-pk Bruce.  A
>standard
>>4 pole VSS won't trigger it?
>>TK
>
>Well, per off line letter tried feeding it a distributor signal, just from
>the
>pickup coil, and doing that gives me a vss signal.  Was using a 555 and for
>some reason, a DC pulse wouldn't trigger it, Hmmmm.
>Cheers
>Bruce
>
>that didn't work???????.
>>-----Original Message-----
>>From: Bruce Plecan <nacelp at bright.net>
>>To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
>>Date: Wednesday, August 12, 1998 6:09 AM
>>Subject: Re: VSS
>>
>>
>>>
>>>-----Original Message-----
>>>From: Richard Wakeling <kojab at ar.com.au>
>>>To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
>>>Date: Wednesday, August 12, 1998 1:07 AM
>>>Subject: Re: VSS
>>>
>>>
>>>>Hi Bruce,
>>>> What ECU are you testing below. Is it the 808 or 747?
>>>
>>>Ooops, it's the 1227730
>>>
>>>>If it is the 808, could it be that your scanner is giving you the wrong
>>>>info. What scanner are you useing on the 808?
>>>
>>>Haven't gotten that far yet.
>>>>Cheers Richard
>>>>
>>>>Bruce Plecan wrote:
>>>>>
>>>>> OK, on the bench ecms.  No matter what memcal, the scanner sees
>>>>> no MPH, and the TCC is always on.  Gear switch doesn't change it
>>>>> or 4th gear apply switch.
>>>>>     Sounds like a bad ecm, maybe?.
>>>>> Any thoughts?, I've checked the wiring several times and everything
>>>appears
>>>>> right..
>>>>>     Kelp
>>>>> Bruce
>>>>
>>>>
>>>
>>>
>>
>>
>
>
>