Hyundai Santa Fe: 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 diagnostic tool. Specification : Refer to "DTC Diagnostic Guide" Removal    • DON’T remove the camshaft position sensor during engine running or right after engine stops, or a scald by the flowed out engine oil may occur...

Knock Sensor (KS). Specifications

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Other information:

Hyundai Santa Fe (TM) 2019-2024 Service Manual: Cowl Cross Bar Assembly. Repair procedures

Replacement    • Put on gloves to prevent hand injuries.    • When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components...

Hyundai Santa Fe (TM) 2019-2024 Service Manual: Emergency Call (eCall) Speaker. Repair procedures

REMOVAL 1. Disconnect the negative (-) battery terminal. 2. Remove the crash pad lower panel. (Refer to Body - "Crash Pad Lower Panel") 3. Remove the ecall speaker (A)...