Probe V6-153 2.5L DOHC (1994)
Knock Sensor: Description and Operation
Knock Sensor
PURPOSE
Knock Sensor (KS) detects engine knock and sends a signal to the Powertrain Control Module (PCM). When knocking occurs, PCM retards
ignition timing until knock ceases.
OPERATION
When sensor crystal structure is distorted by a knock of sufficient intensity and frequency, a small voltage potential is created. Voltage signal is
interpreted by PCM as engine knock and timing is retarded as needed until knock is eliminated.
CONSTRUCTION
Knock sensor contains a crystal element with electrodes attached to opposing sides.