E38 VSS Output Constant 12v

[ProperTuningOG]

Stumped on this one. I have tried every variation in the tune to enable VSS output on this E38 and all I get is a constant 12v. C1-57. No matter what combo I do H0159 and H0162, all I get is constant 12v with key on. Any ideas? Never had this happen before.


This is the stock tune pull. Nothing modified.
E38.ctz

[Taz]

This is a common issue with the later E38s. A Corvette tune will always get you working Speedometer and Tach outputs.

[ProperTuningOG]

Cool. So its a base OS thing? Separate system like the throttle pedal or main OS?

Tach is working awesome.. LOL


Thanks