Toyota 4afe Ecu Pinout May 2026

The 4AFE ECU is a fuel-injected engine control unit that manages the engine's performance, monitoring, and control functions, such as fuel injection, ignition timing, and emissions control. The ECU receives input from various sensors and sends output signals to actuators to control the engine.

| Pin # | Description | | --- | --- | | 10 | Fuel Injector 1 (INJ1) | | 11 | Fuel Injector 2 (INJ2) | | 12 | Fuel Injector 3 (INJ3) | | 13 | Fuel Injector 4 (INJ4) | | 14 | Ignition Coil 1 (IG1) | | 15 | Ignition Coil 2 (IG2) | toyota 4afe ecu pinout

| Pin # | Description | | --- | --- | | 20 | Diagnostic Communication (EFI) | | 21 | Serial Communication (SC) | | 22 | Check Engine Light (CEL) | The 4AFE ECU is a fuel-injected engine control

Here is a general overview of the 4AFE ECU pinout: and control functions

| Pin # | Description | | --- | --- | | 4 | Engine Coolant Temperature (ECT) Sensor | | 5 | Intake Air Temperature (IAT) Sensor | | 6 | Throttle Position Sensor (TPS) | | 7 | Manifold Absolute Pressure (MAP) Sensor | | 8 | Crankshaft Position Sensor (CKP) | | 9 | Camshaft Position Sensor (CMP) |

| Pin # | Description | | --- | --- | | 23-35 | Unused or reserved for future use |