Tii Reverse Switch Thread

[JustJeff]

Originally Posted by Pete_89T2

On the S5 T2, that particular switch serves 2 functions - senses shifts to reverse for the B/U lights and whether or not you're in 5th gear. The ECU uses the latter function, so I'm not sure replacing it with a plug is a viable option if you run a stock ECU.

My understanding on the 5th gear switch is that it's used for either emissions or fuel economy..or both. I can't remember ATM. I've been told this by some credible sources, but didn't research to find out on my own.

I drove my turbo with no switch at all for several years with no adverse effects. I never threw any CELs. I annoyed the shit out of quite a few drivers as they had no warning I was about to back out of a parking space...but..."eh".

With my rebuild I took the time to splice some wiring from the prongs that are left on my switch to the USDM OEM wiring....well for the reverse lights, not the 5th gear switch.