I have the HKS J-spec type-1 TT. It doesn't have an o2 reading option but it does have a battery voltage reading. Couldn't you just cut the wire that it gets the 12v reading from and feed it the wire with the o2 voltage and get an o2 volt reading that way?

Your feeding it a volt off the battery and it give you a reading couldn't you just feed it the lower volt off the o2 and still get a reading?

The only thing I can think of that would make it undoable is that the tt gets its reading off the actual power source. If that is the case you wouldn't be giving it enough power off the o2 volt signal because it’s too low of a volt.

Any ideas?

tia
Brian

everything you said is correct, it would work depending on the resolution of the meter (ex. if it only reads in whole numbers and not .00 range then it wont work, and if it uses that battery voltage to power the TT then if wont work either)