Knock Sensor (Ks) Function [Lf]; Knock Sensor (Ks) Construction/Operation [Lf] - Mazda 2006 MX-5 Service Highlights

KNOCK SENSOR (KS) FUNCTION [LF]

• Detects abnormal combustion in the engine.
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KNOCK SENSOR (KS) CONSTRUCTION/OPERATION [LF]

• Installed on the cylinder block (intake manifold
side).
• Converts vibration from abnormal combustion in
the engine to voltage using the piezoelectric effect
in the semi-conductor and outputs it to the PCM.
• The piezoelectric effect is a phenomenon in which
a difference in electric potential is produced on
the surface of a piezoelectric element by the
application of tensile load or pressure from a
certain direction. Tensile load and pressure
applied to the KS originates from engine vibration
caused by abnormal combustion in the engine.
The difference in electric potential, which results
from the distortion by the vibration, is sent to the
PCM as a knocking signal.
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01–40–50
CONTROL SYSTEM
E5U014018920N01
E5U014018920N02
KNOCK SENSOR
E5U140ZW5309