You only need from the 3S-FE to make a standalone run:
This is constant 12V power from the battery used for memory. If this wire is cut, your car may run but will lose "learned" idle data every time you turn it off. 4s-fe ecu pinout
Often in engine bay (small rectangular box): You only need from the 3S-FE to make
Signals from the distributor/crank sensor for RPM and timing. Control Outputs 4s-fe ecu pinout
Do you have a specific 4S-FE pinout question for the Corona T170 vs. the Celica T200? Leave a comment below or consult the factory wiring diagram supplement for your chassis code.