The design of an ECU involves several critical considerations:
Used for low-cost modules like window switches or seat heaters. On the ECU, a LIN pin is a single-wire, 12V serial interface. Ensure it has a pull-up to 12V per the LIN spec.
A robust ECU pinout spreadsheet separates signals into three distinct categories:
A full pinout document details every pin’s electrical characteristics—not just what it connects to, but how it connects.