Hyundai Elantra: 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.

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 positi ...
Specification
ItemSpecificationCapacitance (pF)850 ~ 1,150
...
Other information:
Hyundai Elantra AD (2016-2020) Owners Manual: Rear Seats
Folding the rear seat
The rear seatbacks can be folded to facilitate carrying long items or to increase
the luggage capacity of the vehicle.
WARNING
Never allow passengers to sit on top of the folded down seatback while
the vehicle is moving. This is not a proper seating position and no s ...
Hyundai Elantra AD (2016-2020) Owners Manual: Manual Climate Control System
To defog inside windshield
1. Select any fan speed except “0” position.
2. Select desired temperature.
3. Select the
or position.
4. The outside (fresh) air will be selected automatically. Additionally, the
air conditioning will automatically operate if the mode is selected to the
p ...