Kia Rio: Description

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.

Knock Sensor (KS)

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Specification

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

See also:

Installation
1. Install in the reverse order of removal. Battery sensor cable installation bolt: 10.8 ~ 13.7 N.m (1.1 ~ 1.4 kgf.m, 8.0 ~10.1 lb-ft) ...

Specification
Item Specification Coil Resistance (Ω) 0.5 [20°C(68°F) ...

Inspection
1. Check for the following items visually. - Cracks or leakage of the canister - Loose connection, distortion, or damage of the vapor hose/tube A ...