3s-fe Ecu Pinout Pdf Review

Do you have a specific 3S-FE pinout question? Leave the year and model in the comments below (or on your favorite forum), but always verify community advice against a factory PDF.

Unplug the coolant temp sensor. Touch one multimeter probe to the sensor connector terminal and the other probe to an ECU pin. When the buzzer sounds, you have found THW. Mark it. 3s-fe ecu pinout pdf

If you are reading this, you are likely wrestling with wiring harness gremlins, planning a standalone engine management upgrade, or trying to diagnose a stubborn check engine light on your Toyota. The engine in question is the legendary Toyota 3S-FE —the workhorse 2.0-liter inline-four found in the Camry, Celica, Carina E, MR2 (rarely), and several Coronas from the late 1980s through the 1990s. Do you have a specific 3S-FE pinout question

Multimeter (with continuity beeper), 12V test light, a notebook, and an FSM for resistance values. Touch one multimeter probe to the sensor connector

| Pin | Code | Function | Notes | | :--- | :--- | :--- | :--- | | B1 | #10 | Injector 1 (Cylinder 1) | Switched ground | | B2 | #20 | Injector 2 | | | B3 | #30 | Injector 3 | | | B4 | #40 | Injector 4 | | | B6 | VSV | EGR VSV (Vacuum Switching Valve) | | | B10 | FPU | Fuel Pump Control | |

Turn the ignition off. Find the thickest white-red wire (BATT). It should have 12V constant. Find the thick brown or white-black wires (E01, E02). These are high-current grounds for injectors.