A detonation sensor attached to the top of the cylinder block in the area between the 2nd and 3rd cylinders detects abnormal vibrations (detonation shocks) in the engine
The sensitive element of the detonation sensor is a piezocrystalline plate
During detonation, voltage pulses are generated at the sensor output, which increase with increasing intensity of detonation shocks.
The ECU adjusts the ignition timing according to the sensor signal to eliminate detonation flashes of fuel.
Removing the decorative engine cover
Click on the lock of the detonation sensor wire pads and disconnect the pad from the sensor
We remove the intake manifold of the engine, as indicated in the article "Replacing the gaskets of the intake and exhaust manifold of the Mazda 6 engine"
Unscrew the bolt of the detonation sensor attachment
Removing the detonation sensor
Installing the sensor in reverse order