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

Hyundai Ioniq (AE) 2017-2024 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) 2017-2024 Service Manual: ESP OFF Switch. Repair procedures

Removal1.Turn ignition switch OFF and disconnect the negative (-) battery cable.2.Remove the crash pad lower cover.(Refer to Body - "Crash Pad")3.Disconnect the crash pad side switch assembly.4.Check the continuity between the switch terminals as the ESP OFF switch is engaged...

Hyundai Ioniq (AE) 2017-2024 Service Manual: Repair procedures

Inspection[Motor]1.Turn the ignition switch OFF.2.Disconnect the EEGR valve connector.3.Check that the EEGR valve is stuck by foreign material. 4.Measure resistance between motor 1 and 3 control terminals of the motor. 5.Check that the resistance is within the specification...