Used to determine cylinder sync for sequential injection.
Where to get exact pinout for a specific ECU part number bosch motronic ecu pinout
Sends a variable voltage or frequency representing air load. Used to determine cylinder sync for sequential injection
: Low-side switches that pull the injector circuit to ground to open the nozzle. bosch motronic ecu pinout
These systems moved toward more sophisticated 55-pin and 88-pin configurations [1]. They introduced more granular control over individual cylinders and secondary air injection [2]. Critical Pins to Watch:
If the ECU is functioning correctly, it will draw roughly of current when the ignition switch is flipped on. A draw of 0mA indicates an open circuit or blown internal diode; a draw exceeding 1.0A indicates a catastrophic short circuit.
