Why does the main power relay on a Bosch Motronic fuel injection system contain a diode?
A) To protect the PCM against voltage surges
B) To protect the PCM against accidental polarity reversals
C) To keep the relay energized in case of relay circuit driver failure within the PCM
D) Both A and B are correct

Question

Quizplus · Accepted Answer

The diode in the main power relay of a Bosch Motronic fuel injection system is designed to protect the Powertrain Control Module (PCM) against voltage surges and accidental polarity reversals. This ensures the PCM's safety and proper functioning by preventing potential damage from electrical issues.

Why Does the Main Power Relay on a Bosch Motronic