Sensors: The Engine Coolant Temperature (ECT) sensor typically feeds into Pin 13, and the Intake Air Temp (IAT) sensor into Pin 44 (on 55-pin versions) [1, 2].
A pinout without voltage ranges, signal types, and expected behavior is nearly useless. For example: bosch motronic ecu pinout
The is more than a drawing—it’s the nervous system of a generation of classic and modern-classic engines. Whether you are reviving a 1989 BMW 325i that sat for a decade, swapping a 1.8T into a classic VW bus, or building a turbo M50 drift car, understanding which wire goes where is the difference between success and weeks of electrical headaches. 2]. A pinout without voltage ranges