1J swap Tach not working

[Dylan JZ]

I really didn't want to either. I would have preferred the stock tach, but it wouldn't work so..

 

[Gunnar]

I got the same issue, 7M-GTE swapped to a a 1JZ vvti. IG- on the diagnostics connector has no signal, NE i get a nice 4.7 volts pulse on the scope, which doesnt seem enough to drive the tach.
Does anyone have a diagram that shows where a 1JZ vvti gets the IG- from?

 

[A32Boost]

i ended up getting a 4in mini tach from autozone for $30