A knock sensor attached to the top of the cylinder block in the area between cylinders 2 and 3 detects abnormal vibrations (knock) in the engine
The sensing element of the knock sensor is a piezoelectric plate
During detonation, voltage pulses are generated at the output of the sensor, which increase with increasing intensity of detonation impacts.
The ECU, based on the signal from the sensor, regulates the ignition timing to eliminate detonation flashes of fuel.
Remove the decorative engine cover
We press the lock of the knock sensor wire block and disconnect the block from the sensor
Removing the intake manifold of the engine, indicated in the article "Replacing gaskets for the intake and exhaust manifold of the Mazda 6 engine"
Unscrew the knock sensor mounting bolt
Remove the knock sensor
Install the sensor in reverse order