Toyota 4afe Ecu Pinout Link

Drop a comment below (if applicable) or consult the factory Toyota Electrical Wiring Diagram (EWD) for your specific chassis code.

A: The 7AFE (1.8L version) ECU has different fuel maps and ignition timing. It will run a 4AFE, but poorly—rich at idle and lean at high RPM. Pinouts are similar but not identical. Not recommended. toyota 4afe ecu pinout

Pins B02-B05 (injectors) are switched grounds. The ECU grounds these wires to fire the injectors. You will not see 12V here with the key on. Instead, each wire should show continuity to ground for a brief pulse when cranking. Connector C (12 pins) – Auxiliary & Diagnostics This connector handles extra sensors, tachometer, and diagnostics. Drop a comment below (if applicable) or consult