3s-fe Ecu Pinout Pdf Jun 2026

When utilizing a digital pinout PDF, always cross-reference your ECU part number (e.g., 89661-xxxxx). Toyota frequently updated pin locations between the Gen 2 (Camry) and Gen 3 (RAV4) iterations of the 3S-FE.

Once you download a PDF (we will discuss safe sources below), follow these steps to avoid shorting your ECU:

Houses the throttle position sensor (VTA) and power supply for altitude or manifold pressure sensors (VC).

Because Toyota updated the wiring frequently, we recommend looking for PDFs specific to your vehicle model year. 3s-fe ecu pinout pdf

Use a small jeweler's screwdriver or a depinning tool. Slide the screwdriver into the terminal slot to release the locking tab. Pull the wire gently from the back. Never cut wires if you plan to reuse the ECU.

Receives 12V from the EFI Main Relay when the ignition switch is ON. Constant Battery Power

Look at the sticker on your ECU aluminum casing. Note down the 10-digit Toyota part number (e.g., 89661-xxxxx ). When utilizing a digital pinout PDF, always cross-reference

Ignition Feedback signal sent from the igniter back to the ECU confirming a spark occurred. If the ECU misses this signal, it cuts fuel to prevent flooding. Fuel Injection & Air Metering

When you open a factory , you will typically see two perspectives:

Check continuity between the pins and a clean metal chassis ground point. Resistance should be less than 0.5 Ohms. 2. Diagnosing a "No Spark" Condition Because Toyota updated the wiring frequently, we recommend

PIM (Manifold Absolute Pressure/MAP sensor signal).

The is a 2.0L straight-four engine known for its balance of reliability and performance across models like the Toyota RAV4, Camry, and Celica. Managing this engine is the Engine Control Unit (ECU), which acts as the central brain of the Toyota Computer Controlled System (TCCS) . Understanding the 3S-FE ECU Pinout