4s-fe Ecu Pinout Link -

Need help identifying your specific 4S-FE ECU? Remove the glove box, locate the ECU behind the kick panel, and note the 89661-xxxxx number. Search that number + “pinout” for exact matches.

Below is a generalized pinout reference for the standard 4S-FE ECU configuration. 4s-fe ecu pinout

signal will cause the ECU to cut fuel after a few seconds of running to protect the catalytic converter. Sensor Health : Ensure the (coolant) and Need help identifying your specific 4S-FE ECU

Signal back from the igniter confirming the coil fired (required to keep the fuel pump running). 4s-fe ecu pinout

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.