Hyundai Veloster: Knock Sensor (KS). Description and Operation

Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and senses engine knocking.

When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. When a knock occurs, the sensor produces voltage signal. The ECM retards the ignition timing when knocking occurs. If the knocking disappears after retarding the ignition timing, the ECM will advance the ignition timing. This sequential control can improve engine power, torque and fuel economy.

Camshaft Position Sensor (CMPS). Repair procedures

Inspection 1. Check the signal waveform of the CMPS and CKPS using the GDS. Specification: Refer to “Wave Form” ...

Knock Sensor (KS). Specifications

Specification Item Specification Capacitance (pF) 950 ~ 1,350 Resistance (MΩ) 4.87 ...

See also:

Headlamp delay (if equipped)
If you turn the ignition switch to the ACC or OFF position with the headlights ON, the headlights remain on for about 20 minutes. However, if the driver’s door is opened and closed, the headligh ...

Heated Oxygen Sensor (HO2S). Repair procedures
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the HO2S connector. 3. Measure resistance between th ...

Front Wiper Motor. Components and Components Location
Component Location 1. Cap 2. Nut 3. Wiper arm & blade 4. Cowl top cover 5. Bolt 6. Wiper motor & linkage assembly ...