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As many of you know, I've started a company to sell electric spoiler ram (eRams) kits for the 996 and 997 turbos - replacing the finicky yet over-engineered hydraulic system. It does away with all hydraulics. Anyhow, I'm playing with the logic that was ultimately programmed into the ECU. I'm wondering if there is a way to get the logic from Porsche? Or perhaps someone here has some better insight?
At this point it seems to me as something like this:
To raise wing:
1. Momentary push of switch or cluster speedo (75 MPH) signal to ECU to raise spoiler.
2. ECU send current to relay 1 coil which activates motor in one direction.
3. Wing travels up and closed circuit from top limit switch (passenger side ram on top) within ~14 seconds.
If no limit switch contact - then WARNING at cluster.
ALSO...Wing will not go down either by switch or cluster speedo (37 MPG) signal from ECU to lower spoiler.
Similarly to lower wing:
1. ONLY for cluster speedo (37 MPH) signal to ECU to lower spoiler.
2. ECU send signal to relay 2 coil which activates motor in other direction.
3. Wing travels down and closed circuit from bottom limit switch (passenger side ram on bottom) within ??? seconds.
**this is different than "UP" as the push to lower switch can be let go at some point before the wing is fully down. Therefor the time-out counter only works with the speedo signal...
If no bottom limit switch contact - then WARNING at cluster
Not sure if the wing will go up "at next signal to raise" unless fault is cleared (cycle key off).
Any info out there?? I'm also wondering if there was a logic change between '01 and '02 model years. There seems to be two wiring diagrams out there for them.