TYPE I / TYPE II DIS C3I MODULE WIRING

[Eric J. Klammer]

> Subject: 
>          Re: TYPE I / TYPE II DIS C3I MODULE WIRING
>     Date: 
>          Thu, 19 Feb 1998 07:02:01 -0800
>     From: 
>          "TBK" <terryk at foothill.net>
> Reply-To: 
>          diy_efi at efi332.eng.ohio-state.edu
>       To: 
>          <diy_efi at efi332.eng.ohio-state.edu>
> 
> 
> One little good point you made. GM keys everything. Unless they cut the
> keyways, If it fits, it likely the compatable type.

1984/5 control modules ARE NOT pinned out the same as 1986/7 modules, of
this much I'm certain. (my 85 regal wouldn't run after I tried dads 86
module on it as a part of a troubleshooting exercise)  The pinout is all
that is different.  power and signal fromn the crank sensor are reversed
(I THINK).  In any case, it plugged in, and I had to change my crank
sensor.

88 and up modules use more slots on the rings...Cam sensor and 2 rings
of crank sensor provide redundancy.

Hope this helps

Eric

{Snip}
> 
> >The modules are not direct swaps.  With schematics and some minor
> >harness modifications, you may be able to get them to work.  You might
> >need to change to a different plug in, they are "keyed" to fit the
> >appropriate modules.
> >
{snip}


> >>
> >> It appears the Type I C3I coil pack (opposite side output) was swapped
> >> to a Type II (same side output) to correct a miss in the engine..
> >>
> >> Can someone confirm, deny, or supply dis-information regarding the
> >> wiring being different between the two.
> >>
> >> I suspect the two can not be swapped without changing the sensor, EST,
> >> bypass, etc wiring.
> >>
> >> Drawing appear to show them as being different.
> >>
> >> Are they direct swaps?
> >>
> >> True or false.
> >>
> >> Terry Kelley
> >