2uzfe Ecu Pinout Page

The 2UZ-FE is sensitive to ground offsets. If the voltage between pin 14 (power ground) and pin 13 (sensor ground) fluctuates more than 0.1V, you will see erratic sensor readings and transmission shifting issues.

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Commonly identified terminals on the 2UZ-FE engine control module (ECM) include: +B, +B2: Main power supply from the EFI relay. BATT: Constant battery power for memory. E1, E01, E02: Primary engine and sensor grounds. MREL: Main relay control signal. Sensors (Inputs): The 2UZ-FE is sensitive to ground offsets

| Pin No. | Circuit | Function | Notes | | :--- | :--- | :--- | :--- | | | BATT | Battery Positive | Constant 12V (Backup Power) | | 2 | +B | Main Relay Power | Switched 12V | | 14 | E1 | Engine Ground | Critical Ground | | 15 | E2 | Sensor Ground | Critical Ground | | 16 | E01 | Power Ground | ECU Ground to Block | | 17 | E02 | Power Ground | ECU Ground to Block | BATT: Constant battery power for memory