Uses an ST10 processor with internal flash memory. It often requires specific "boot mode" connections, sometimes involving soldering resistors to enable reprogramming. Useful Resources for Your Project
| Pin(s) | Function | Better Explanation | | :--- | :--- | :--- | | | Main Power (B+) | Connect directly to battery via 20A-30A fuse. Do not daisy chain. | | 2, 11, 57 | Power Ground | High-current return for injectors/coils. Go directly to engine block. | | 27, 28 | Logic Ground (Sensor Ground) | Clean 0v reference for MAP, TPS, ECT. Do not mix with Pin 2 or 11. | bosch m797 pinout better
Based on several OEM schematics, pins group into: Uses an ST10 processor with internal flash memory
If you're diving deep into a repair or a tune, these guides can help you avoid a "fried" board: Do not daisy chain
: Websites like Reddit, specialized automotive forums (e.g., ECUtuning, Romraider), and social media groups often have users who share their experiences, documentation, and pinouts for various ECUs, including the M797.
| Pin # | Signal Name | Description | | --- | --- | --- | | 1 | VBATT | Battery voltage | | 2 | GND | Ground | | 3 | TPS | Throttle position sensor | | 4 | MAP | Manifold absolute pressure sensor | | ... | ... | ... |