4s-fe Ecu Pinout -

Do not start replacing sensors randomly. Use a (digital) and a back-probe kit (paperclips work in a pinch).

(MAP) sensors are providing steady voltage readings; incorrect data here can cause rich/lean running conditions. Are you currently working on an engine swap or diagnosing a specific fault like a no-start or rough idle? 4E-FE ECU Pinout and Wiring Details | PDF - Scribd 4s-fe ecu pinout

These are power grounds specifically for the high-current injector drivers. Essential Sensor Inputs Do not start replacing sensors randomly