Search found 10 matches

by Jim White
Wed Sep 12, 2018 8:05 pm
Forum: Road Rally
Topic: Subaru VSS to Alpha-Pro
Replies: 13
Views: 5649

Re: Subaru VSS to Alpha-Pro

:D Just a final update. After over 1000 miles of testing including 375 miles of POR 2018 the 2013 Subaru Outback "vehicle speed output signal" has proven to provide a reliable signal on my Alpha-Pro. (And I only got my hands slightly dirty running the wire around the engine compartment but soap took...
by Jim White
Sun Nov 05, 2017 5:10 pm
Forum: Road Rally
Topic: Subaru VSS to Alpha-Pro
Replies: 13
Views: 5649

Re: Subaru VSS to Alpha-Pro

Just a further update. Testing at speeds up to 70 MPH continuous over 10 miles of interstate show that the "vehicle speed output signal" works reliably on my Alpha-Pro. I was getting errors in 10 miles of plus or minus .003-4 miles which is very reasonable and easily accounted for by slightly differ...
by Jim White
Wed Oct 25, 2017 6:54 pm
Forum: Road Rally
Topic: Subaru VSS to Alpha-Pro
Replies: 13
Views: 5649

Re: Subaru VSS to Alpha-Pro

Continuing to poke at it there really is nothing labeled "VSS" on the "newer" Subarus and the signals coming off the transmission where the old VSS came off aren't clean square waves as shown on the prior oscilloscope traces. But I've now located a "vehicle speed output signal" line off of the Vehic...
by Jim White
Fri Oct 20, 2017 10:10 am
Forum: Road Rally
Topic: Subaru VSS to Alpha-Pro
Replies: 13
Views: 5649

Re: Subaru VSS to Alpha-Pro

Not to be a jerk, though I play one on TV... Scott, what TV show? I'd just like to check and see if you act it any better than you do it in person:-) A) I don't happen to have the magnets or a bracket or ... on hand (and I'd have to get my hands dirty). B) I enjoy playing with electronics. C) The e...
by Jim White
Wed Oct 18, 2017 5:12 pm
Forum: Road Rally
Topic: Subaru VSS to Alpha-Pro
Replies: 13
Views: 5649

Re: Subaru VSS to Alpha-Pro

About 7 MPH (see prior message for discussion). Dropping into negative volts and decreasing the signal amplitude adds to the difficulty of reprocessing the signal so it's suitable for the Alpha-Pro. (So the solution may be magnets.)
by Jim White
Wed Oct 18, 2017 5:06 pm
Forum: Road Rally
Topic: Subaru VSS to Alpha-Pro
Replies: 13
Views: 5649

Re: Subaru VSS to Alpha-Pro

It looks like the Subaru Secondary Speed Sensor is closely tied to vehicle speed while the Primary one isn't so much. I've attached an image to this response that shows the nScope result at about 35 MPH. Not exactly the square wave that the Subaru documentation shows but close enough. Unfortunately,...
by Jim White
Wed Oct 18, 2017 12:27 pm
Forum: Road Rally
Topic: Subaru VSS to Alpha-Pro
Replies: 13
Views: 5649

Re: Subaru VSS to Alpha-Pro

nScope seemed to work a treat! I've attached an image. Bummer though, unless I've got the wrong signal wire, which I will double check (pin 6 on connector B54), the signal I've attached to is clearly not a "VSS" signal and certainly not a square wave or +5V. While it is rock steady at a constant spe...
by Jim White
Wed Oct 18, 2017 9:06 am
Forum: Road Rally
Topic: Subaru VSS to Alpha-Pro
Replies: 13
Views: 5649

Re: Subaru VSS to Alpha-Pro

Thanks guys. More input welcome. According to the Subaru Outback documentation I've been able to see, in gear and running at idle the VSS signal below the instrument cluster should be outputting a +5 V square wave of about 560 pulses per second. That very much seems to square with what I see the Alp...
by Jim White
Fri Sep 29, 2017 3:53 pm
Forum: Road Rally
Topic: Subaru VSS to Alpha-Pro
Replies: 13
Views: 5649

Subaru VSS to Alpha-Pro

I connected my "new" 2013 Subaru Outback SUV's VSS signal to my (ribbon cable) Alpha-Pro odometer box and all worked fine at slow speeds but at higher speeds the signal is apparently way too fast for the Alpha-Pro. I've looked at some of the taxi meter connectors and cruise control connectors but th...
by Jim White
Wed Aug 16, 2017 9:02 pm
Forum: Road Rally
Topic: POR to Alaska?
Replies: 0
Views: 1468

POR to Alaska?

Last chance at a plan C, rally registration ends midnight Sept. 1 Alaska time. Me and two other rallyists drive my car to Alaska leaving around noon after POR and stopping in motels/hotels for 8-10 hours each night and arriving Thursday in time for the banquet. The other rallyists would pay their sh...