Fuel Injection (Fuel System)
SENSORS AND SWITCHES
FU-27
F: KNOCK SENSOR
! The knock sensor is installed on the cylinder block, and senses knocking that occurs in the en-
gine.
! The sensor is a piezo-electric type which converts vibration resulting from knocking into electric
signals.
! In addition to a piezo-electric element, the sensor has a weight and case as its components. If
knocking occurs in the engine, the weight in the case moves causing the piezo-electric element to
generate a voltage.
! The knock sensor harness is connected to the bulkhead harness.
(1) Nut A: To knock sensor harness
(2) Weight
(3) Resistor
(4) Housing
(5) Piezo-electric element
B2H1998B
W2290GE_02_FU.fm 27 ページ ２００１年４月１１日 水曜日 午前９時３１分
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