Focus ZTS L4-2.0L DOHC VIN 3 (2001)
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Knock Sensor: Description and Operation
Knock Sensor
Two Types Of Knock Sensor (KS)
The Knock Sensor (KS) (Figure 35) is a tuned accelerometer on the engine which converts engine vibration to an electrical signal. The PCM uses this
signal to determine the presence of engine knock and to retard spark timing.