So I had to tap in to my ABS speed sensor wire (per this doc: http://www.nav-plus.com/instructions/a4b6abs.html). After hooking it up and viewing the hardware info screen's "Speed Sensor" setting, I see that when I put around in 1st gear (my speedo reads like 10 to 15mph max) the menu shows 22-28. Does that number have to correspond to MPH? I haven't taken my car out of the garage (underground parking) to let it hit the GPS.
Thoughts?
The sensor number has nothing to do with your speed (doesn't match mph).
The sensor number has nothing to do with your speed (doesn't match mph).
Okay so since I am getting some numbers being displayed the faster i go, it must be working 
I hooked up my volt meter before I hooked it up to the nav and I could see the "V" go up the faster I went 
Thanks.a
The sensor number has nothing to do with your speed (doesn't match mph).
The number doesn't have to be the speed in MPH, but it should be a linear correlation. If you are going 14 mph and the VSS line says 28 (for instance) when you go 40 mph, it should say about 80. Or whatever. I have seen cars with VSS numbers in the 1000's. Some are close to MPH some are just double it. Depends on lots of factors. But the number should track the mph, the faster you go the higher you go and you can test 2 numbers, one at 20 mph and one at 40 mph and the VSS should be roughly 2x.
The sensor number has nothing to do with your speed (doesn't match mph).
The number doesn't have to be the speed in MPH, but it should be a linear correlation. If you are going 14 mph and the VSS line says 28 (for instance) when you go 40 mph, it should say about 80. Or whatever. I have seen cars with VSS numbers in the 1000's. Some are close to MPH some are just double it. Depends on lots of factors. But the number should track the mph, the faster you go the higher you go and you can test 2 numbers, one at 20 mph and one at 40 mph and the VSS should be roughly 2x.
You're correct. It's nearly 2x what my speedo says. I wanted to get on the fwy today and set my cruise control (via the Z2, not the speedometer, as they are slightly different) at say 70.0mph, then see if my speed sensor was about double, but i didnt have the change. After quick glance though its nearly double.