❌ – They are not. A 89661-02020 (MR2 Turbo) has a completely different pinout than a 89661-2F210 (Camry). ❌ Using a pinout for a different transmission type – Auto and manual ECUs swap several pins (neutral switch, PNP signals). ❌ Mixing up connector numbering – Some diagrams number left-to-right, others right-to-left. Look for a molded “1” on the connector.
Disclaimer: These are verified from factory manuals, but always confirm with your specific ECU serial number. toyota 89661 ecu pinout
provide pinouts specifically for bench flashing and "boot mode" operations. : For older JDM engines (like the LS400 1UZ-FE ❌ – They are not
| Pin No. | Symbol | Description | Wire Color (Typical) | | :--- | :--- | :--- | :--- | | | Ground | ECU Case/Signal Ground | Brown/White | | E2 | Ground | Sensor Ground | Brown | | E01 | Power Ground | Injector/Actuator Ground | Brown | | E02 | Power Ground | Injector/Actuator Ground | Brown | | BATT | Battery Power | Constant 12V (Keep Alive Memory) | Black/Red | | +B | Main Relay | Switched 12V Power (Main) | Black/Orange | | +B1 | Main Relay | Switched 12V Power (Backup) | Black/Orange | ❌ Mixing up connector numbering – Some diagrams