Bosch Motronic Ecu Pinout -

"pin_number": 2, "function": "Ground (Sensor Return)", "type": "Ground", "wire_color_suggestion": "Brown/Black", "expected_voltage": "< 0.1V", "notes": "Critical for accurate sensor readings. Check for continuity to chassis." ,

Bosch Motronic evolved over nearly 30 years. The pinout is not universal. Below are the most common families. bosch motronic ecu pinout