Hyundai Ioniq: Engine Control System / Knock Sensor (KS). Description and operation

Hyundai Ioniq (AE) 2017-2025 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

Inspection1.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

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Other information:

Hyundai Ioniq (AE) 2017-2025 Service Manual: Front Driveshaft. Repair procedures

Removal1.Loosen the wheel nuts slightly.Raise the vehicle, and make sure it is securely supported.2.Remove the front wheel and tire (A) from the front hub. Tightening torque : 107.9 - 127.5 N.m (11.0 - 13.0 kgf.m, 79.6 - 94.0 lb-ft) • Be careful not to damage the hub bolts when removing the front wheel and tire...

Hyundai Ioniq (AE) 2017-2025 Service Manual: Timing Chain Cover. Repair procedures

RemovalEngine removal is not required for this procedure. • Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries...