Knock Sensor (KS) (Hyundai Getz 1)

The knock sensor mounted on the cylinder block reacts to high-frequency vibrations of the cylinder block and



converts them into electrical signals, the magnitude of which increases as detonation increases. Based on these signals, the ECM shifts the ignition timing towards delay, thereby eliminating detonation.

Examination

1. Disconnect the connector from the knock sensor and measure the resistance between terminals 1 and 2 of the connector.



Resistance: more than 5 mOhm at 20°C

2. If the resistance is different from the specification, replace the sensor.

Tightening torque: 16–25 Nm

3. Measure the capacitance between terminals 1 and 2 of the connector.

Capacity: 800-1600 pf