I had a uzs141 half cut . wiring diagram is almost impossible
to obtain. my reccomendation is that you VERY CAREFULLY dissect the wiring loom as most of the relevant wiring goes through the left hand side of the vehicle. only a few important wires went through the rh pillar. retain the fuse and relay box as this supplies power to computer and starter. ecu wiring is much the same as for sc400 . pay particular attention to the wiring of the separate 40 pin connector on the ecu. I put the motor and auto into a hilux so I did not have issues with the speed sensors as you do. A speed sensor for number 1 speed input MAY work for you.It will need to be 1 pulse per rev of the driveshaft or 4 pulses per rev of the speedo cable