Camry Sedan 2WD V6-2507cc 2.5L DOHC (2VZ-FE) (1990)
Knock Sensor: Description and Operation
Knock Sensor
The Knock Sensor, mounted in the engine block, is a piezoelectric element tuned to resonate at the same frequency as engine knock (detonation). As the
engine knocks, the piezo element resonates at the same frequency and produces a voltage that varies according to the amplitude of the knock. This
voltage is the input signal to the ECU. This signal is input to the ECU through the KNK pin.