3.
Measure the capacitance between terminals 1 and 2.
800 ~ 1600 pF
The knock sensor is attached to the side of the cylinder block to sense engine knocking. 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 relayed to the ECM. If engine knocking occurs, ignition timing is retarded to suppress it.
Disconnect the knock sensor connector and measure resistance between terminals 1 and 2.
about 5MΩ [at 20°C (68°F)]
If the resistance is continuous, replace the knock sensor.
Tightening torque
Knock sensor :
16 ~ 25 Nm (160 ~ 250 kg·cm, 11.8 ~ 18.4 lb·ft)
Measure the capacitance between terminals 1 and 2.
800 ~ 1600 pF
