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Z

Zener diode

A type of diode that behaves like a typical silicon diode up to a precise voltage threshold called the Zener point . After it reaches the Zener point voltage, the diode conducts in both directions.

Zener point

The voltage at which a diode conducts current in both directions instead of just one.

zero fuel mass calibration (ZFC)

The process of recalibrating injectors during service to compensate for wear and deterioration.

zero-volt return (ZVR)

The negative polarity of a sensor circuit originating from inside the ECU that is regulated and filtered to eliminate any electrical noise or interference that could create unwanted errors in switch or sensor values.