Kia Cee'd: Engine Control System / 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 ...

Other information:

Kia Cee'd JD Owners Manual: Manual transaxle operation
■ Type A ■ Type B The manual transaxle has 6 forward gears. This shift pattern is imprinted on the shift knob. The transaxle is fully synchronized in all forward gears so shifting to either a higher or a lower gear is easily accomplished. Depress the clutch pedal down ...

Kia Cee'd JD Service Manual: Auto Light Sensor Repair procedures
Inspection In the state of IGN1 ON, when multifunction switch module detects auto light switch on, tail lamp relay output and head lamp low relay output are controlled according to auto light sensor's input. The auto light control doesn't work if the pin sunlight s ...