Toyota 4afe Ecu Pinout

4AFE wiring diagram PDF, 4A-FE distributor pinout, Toyota 4AFE ECU pinout 1994, 4AFE swap wiring guide, 4AFE diagnostics TE1 E1.

Is this for or performing an engine swap/standalone install ? Share public link

Often high-density grey connectors (26p-16p-22p). Standard Toyota 4A-FE ECU Pinout Matrix toyota 4afe ecu pinout

| Model Year / Market | Pinout Difference | |---------------------|--------------------| | 1988–1992 AE92 (USA) | Uses 26-pin + 12-pin. Pins shifted. Pin 13 IGF is on different slot. | | 1996–1997 OBD-II AE102 | Adds pin for secondary O2 sensor (after cat). Pin B4 becomes HO2S1. | | European Carina E | Connector pins often reversed (female on harness). Pin A16/A17 swapped. | | Geo Prizm (L-body) | Uses same 22+16 but colors differ. Use pin number, not color – GM used different wire suppliers. |

The 4A-FE ECU is popular for standalone swaps into classic RWD cars (e.g., Toyota KE70, TE71). However, the stock ECU needs several signals to work outside a Corolla. 4AFE wiring diagram PDF, 4A-FE distributor pinout, Toyota

If these lack power, the engine will not start. Check the EFI fuse.

Pin numbering is usually read Left to Right, Top to Bottom. Standard Toyota 4A-FE ECU Pinout Matrix | Model

The 4A-FE frequently uses 4 or 5 connectors. A common layout for a 90s Corolla looks like this: Connector 1 (Usually 22-26 pins) Fuel Injector control (#10, #20) 20-22: Idle speed control valve 25: Fuel pump relay ground (FC) Connector 2 (Usually 10-16 pins) 1-5: Distributor signals (NE+, NE-, G+, G-) 8: Ignition Timing (IGT) 9: Ignition Confirmation (IGF) 10: Knock Sensor Connector 3 (Usually 16-22 pins) 1-5: Sensor Power and Grounds (VC, E2) 7: Throttle Position Signal (VTA) 8: Idle Signal (IDL) 10: MAP Sensor Input (PIM) 15: Coolant Temp Signal (THW) Troubleshooting Common 4A-FE Pinout Issues