Hyundai Sonata LF: Engine Control System / Knock Sensor (KS) Description and Operation

Hyundai Sonata LF 2014-2019 Service Manual / Engine Control / Fuel System / Engine Control System / Knock Sensor (KS) Description and Operation

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.

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” Removal • DON’T remove the camshaft position sensor while the engine is running or right after engine is turned off...

Knock Sensor (KS) Specifications

S..

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Rear Glass Repair procedures

Removal • In order to remove the rear glass, use the tools shown in the following figure: [Tooling Diagram] Square wire Insert-type wire grip [Tooling Assembly Diagram] • Insert and affix square wire into the insert hole of the wire grip ...

Hyundai Sonata LF 2014-2019 Service Manual: Under Body Body Repair