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For a broader look at Toyota's ECU pinouts from this era, you can browse these digitized manuals: Manual All Toyota Wiring Diagram and ECU Pinout : A comprehensive 591-page PDF covering various models. Toyota ECU Pinout Guide (Scribd)

If you need help identifying a specific wire color or pinpointing the exact pin numbers for your project, let me know:

If IGF is missing, the ECU shuts down injectors to prevent catalytic converter damage. If you have spark but no pulse, check IGF .

Use a digital multimeter set to resistance ( Ωcap omega

Toyota 4S-FE ecu pin out please - Printable Version. Toyota 4S-FE ecu pin out please - Printable Version. +- CarTechnoloGY (https: CarTechnoloGY Toyota Carina AT192 - 5A-FE ECU Pinout & Wiring Diagrams

Usually caused by dirty ISC valve, but check pin B5 and B6. With engine warm, AC off, idle should be 750–800 RPM. If surging, back-probe B5/B6: you should see a duty cycle varying from 30% to 70%. If not, the ECU may have damaged ISC drivers.

Ignition Confirmation signal back from the igniter (crucial for fuel delivery). Fueling: