[V8] Motronic ECU to Shift Lever Wiring Question

dsaad at icehouse.net dsaad at icehouse.net
Fri May 14 16:30:13 EDT 2004

If I had to guess, I think that pin gets grounded by the selector switch.
It is hard for me to read the switch schematic but I think current track
410(ground) gets connected to current track 411 at some point - which is your
ECU pin 42. An ohm meter should confirm or deny this.


Quoting Alan Kramer <ackramer at hotmail.com>:

> On pin 42 of the ECU connector of a PT powered V8 there is a 18 ga. green
> wire that leaves the red harness at Kostal connector 3 and evetually goes to
> the transmission selector switch and P/N shift lock controller.
> Can anyone verify what is happening on this wire?   Is the ECU controlling
> that pin, or is that pin an input for the ECU?
> If I had to guess, I would assume that voltage (or possibly lack thereof) on
> that wire tells the ECU that the car is in neutral or park, and the ecu
> limits the rev at a value lower than 6500.  I don't know if the PT ECU has
> that feature or not, but that would seem to make sense to me.
> Thanks for any input.
> Alan
> P.S.  I snagged a second PT engine and other bits at a pick-and-pull earlier
> this week...one more and my whole fleet will be V8'ed. ;-)
> -----------------------------------
> Alan Kramer
> http://www.geocities.com/audikramer
> '83 UrQ V8
> '83 CGT 20vt
> '86 4kcsq
> '90 V8q
> -----------------------------------
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