: Critical pins include IGT (Ignition Trigger) and IGF (Ignition Confirmation signal).
An ECU pinout serves as a reference map for every terminal on the connector. For a standard 4A-FE setup: 4afe ecu wiring diagram pdf
When working with these diagrams, keep the following in mind as noted in the Corolla Owners Workshop Manual : Critical pins include IGT (Ignition Trigger) and