I'm assuming the DBW pedal outputs 0-5VDC when powered by 12VDC bus, but I don't have the associated pin out. Pedal should be from an 06 WRX. I read a post on NASIOC stating the following pin out:

6 - Sensor
5 - GND
4 - PWR

I tried this, but the senor lead (referenced to GND) didn't move when the pedal was depressed.