Sequoia LTD 4WD V8-4.7L (2UZ-FE) (2001)
Knock Sensor: Description and Operation
Knock Sensor
Each knock sensor is fitted to the right bank and left bank of the cylinder block to detect engine knocking. This sensor contains a piezoelectric element
which generates a voltage when it becomes deformed, which occurs when the cylinder block vibrates due to knocking. If engine knocking occurs,
ignition timing is retarded to suppress it