929 V6-3.0L DOHC (1993)
Knock Sensor: Description and Operation
PURPOSE
Two knock sensors detect engine knock and send a signal to the PCME. When knocking occurs, the PCME retards ignition timing until knock
ceases.
LOCATION
One each on the side of each cylinder head.
OPERATION
The knock sensors contains a crystal element with electrodes attached to opposing sides. When the crystal structure is distorted, a small voltage
potential is created between opposite sides. When a knock of sufficient intensity and frequency occurs, the crystal is distorted slightly, generating
a voltage signal that the PCME can detect.
