300ZX Coupe V6-2960cc DOHC (VG30DE) (1994)
Knock Sensor: Description and Operation
Knock Sensor
PURPOSE
To help prevent engine damage due to pre-ignition or pinging.
OPERATION
A knocking vibration from the cylinder block is applied as pressure to the piezoelectric element. This vibrational pressure is then converted into a
voltage signal which is delivered as output to the Engine Control Module (ECM).
CONSTRUCTION
(C) The knock sensor, consists of a (3) housing a (4) piezoelectric crystal mounted on a (5) threaded sleeve between (6) two connector strips.
One side of the assembly is fitted with a (7) damping weight and (8) spring washer secured by a (9) nut.