I'm installing the pioneer avg-vdp1 vehicle diagnostics processor in my sc4. This unit has a wire (pink) that needs to be connected to the vehicle's speed detection circuit. I believe it's looking for a pulse signal. The question is, which one? There are 2 pulse signal wires in the sc4. One puts out 4 pulses per revolution of the rotor shaft and the other 20 pulses. Does anyone who completed this install know which wire I'm looking for?

Thx

 

Im in also in the process of finishing an install with my audio shop. We followed this http://lextreme.com/PDF/scecu1.pdf diagram but what is weird is that the overdrive has to be set to OFF while driving in order for the GPS to correctly know my speed. He may have wired it to the O/D speed sensor. We are trying to figure out which one doesn't use this so I don't get robbed more mileage.

 

ok the vehicle speed sensor was the solid pink wire on the ECM. There was 2 pink wires, but the solid one worked great. The red (O/D) did only when overdrive was not on, and if it was on, only for gears 1-3 until O/D kicked in, then the speed pulse would stop telling the GPS how fast you were going. Hope that helps

 

i am using the VSS wire from the tranny to The ECU. I should work.

 

Thanks CyBorG. that's the wire i tried first because it was easy to locate. Seem to be working fine. Just to be clear... for anyone viewing this thread later...It's located in the lower of the 2 orange harnesses in the driver side kick panel. The spd wire(Pink) is pin 7 of the 10 pin connector.