: Control lines for fuel injectors, ignition coils, and throttle bodies.
: Even ECUs that look identical can have different internal configurations based on their Bosch part number. Bosch Ecu Pinout Datasheet
She ignores generic forum posts. Instead, she opens her laptop and searches: (the actual part number stamped on the ECU case). She finds a PDF: "ME7.5 Wiring Information - Bosch Motorsport Support." : Control lines for fuel injectors, ignition coils,
These pins allow the ECU to talk to other modules or diagnostic tools. : Control lines for fuel injectors
Finding a specific Bosch ECU pinout requires the (typically starting with 028 or 026 ). Because Bosch produces thousands of unique Engine Control Units for different manufacturers, there is no single "universal" datasheet. How to Find Your Specific Pinout