It’s in the panel underneath the glove box, and on the sidewall of the passenger side, close to where a passenger would have their feet. It’s not easy to get to. The part itself is not expensive.
My 1994 Toyota 4wd pickup (4 cyl 22re) has a problem. Mechanics have given up. I'm wondering if you have encountered this before. Truck would turn over but die immediately. Replaced fuel pump which was burned out. Truck would stay running a little longer but still die. Replaced mass...