Me7.4.5 Pinout File

| Pin No. | Function | Description | | :--- | :--- | :--- | | | Ground (Power) | ECU Main Ground (to chassis/battery) | | A2 | Ground (Power) | ECU Main Ground | | A3 | Switched Power (+12V) | Main Relay Output (Input to ECU) | | A4 | Ground (Power) | ECU Main Ground | | A5 | Ground (Signal) | Sensor Ground Return | | A6 | Switched Power (+12V) | Main Relay Output (Input to ECU) | | B1 | +12V Battery | Permanent Battery Voltage (Keep Alive Memory) | | B2 | Main Relay Control | ECU switches this to ground to activate the Main Relay | | B3 | Ground (Signal) | Sensor Ground Return |

The ME7.4.5 uses three main connectors: T121 (engine harness), T94 (vehicle harness), and T80 (secondary functions). The most referenced for tuning/repair is T121 (121-pin). me7.4.5 pinout

Finding a reliable pinout for the is essential for anyone looking to perform bench flashing, chip tuning, or diagnostic repairs on Peugeot and Citroën vehicles. This ECU is commonly paired with the 1.6L 16V (NFU/TU5JP4) engines found in the 206, 207, 307, and C4. | Pin No

The ME7.4.5 is more than just a controller; it manages complex engine strategies: Finding a reliable pinout for the is essential

If the ECU is unresponsive ("bricked"), you must put it into to flash the internal memory directly

For a more detailed and printable version of the ME7.4.5 pinout, you can download our PDF guide: