C 230 (203.040) L4-1.8L SC (271.948) (2005)
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Component Identification
Function
The vibrations on the cylinder housing are converted by the interior piezo-crystal on the knock sensor into electrical voltage signals. These signals are
transmitted over a 2-pin screened line to the ME control unit (N3/10).
Piezo-electric effect:
An electrical voltage is generated by the mechanical force on a piezo crystal.
