Tundra Access Cab LTD 4WD V8-4.7L (2UZ-FE) (2001)
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Knock Sensor: Description and Operation
P0325 - Knock Sensor 1 Circuit Malfunction (Bank 1)
CIRCUIT DESCRIPTION
DTC Detection Condition
One of the knock sensors is fitted to the right bank and another to the left bank of the cylinder block to detect the engine knocking. This sensor contains a
piezoelectric element which generates voltage when it becomes deformed. This occurs when the cylinder block vibrates due to knocking. If the engine
knocking occurs, ignition timing is retarded to suppress it.
Wiring Diagram
