The Bosch ME20 pinout is a critical piece of information for anyone working with this ECU. With this verified pinout, tuners, enthusiasts, and technicians can confidently modify, troubleshoot, and repair the engine and electrical system. Remember to consult vehicle-specific documentation and wiring diagrams to ensure accuracy and avoid potential damage.

| Pin Number | Signal Name | Description | | --- | --- | --- | | 60 | K-Line | Diagnostic communication line | | 61 | L-Line | Diagnostic communication line |

The 80-pin connector is used for additional I/O and sensor connections.

| Pin Number | Signal Name | Description | | --- | --- | --- | | 1 | IGT | Ignition timing signal | | 2 | IF | Fuel injector pulse width modulation | | 3 | I1 | Injector 1 control | | 4 | I2 | Injector 2 control | | 5 | I3 | Injector 3 control | | 6 | I4 | Injector 4 control |