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 Service Manual: Special service tools
Special Service Tools   Item Illustration Application Fuel Pressure Gauge (09353-24100) Measuring the fuel line pressure Fuel Pressure Gauge Adapter (09353-02100) ...

Kia Cee'd JD Service Manual: Components and components location
Components Location   1. AVN (A/V & Navigation head unit) 2. Tweeter speaker 3. Antenna cable connector 4. Roof antenna (GPS+Radio) 5. Front door speaker 6. Rear door speaker 7. Antenna feeder cable 8. Rear camera ...