Disc Brakes Wear Indicator
When your brake pads are worn and new pads are required, you will hear a high pitched warning sound from your front or rear brakes. You may hear this sound come and go or it may occur whenever you depress the brake pedal.
Note that some driving conditions or climates may cause a brake squeal when you first apply (or lightly apply) the brakes. This is normal and does not indicate a problem with your brakes.
NOTICE
To avoid costly brake repairs, do not continue to drive with worn brake pads.
Information
Always replace brake pads as complete front or rear axle sets.
Rear Drum Brakes
Your rear drum brakes do not have wear indicators. Therefore, have the rear brake linings inspected if you hear a rear brake rubbing noise. Also have your rear brakes inspected each time you change or rotate your tires and when you have the front brakes replaced.
Power Brakes
Parking BrakeHyundai Elantra AD (2016-2020) Service Manual: Input Speed Sensor Repair procedures
Inspection
1.
Using the GDS, check the input/output speed sensor waveforms.
A.
Turn OFF the ignition switch.
B.
Connect the GDS to the Data Link Connector(DLC) on the lower crash pad.
C.
Ignition "ON" & Engine "ON".
D.
Check the input/output speed sensor waveforms at high spe ...
Hyundai Elantra AD (2016-2020) Service Manual: Compressor Description and Operation
Description
The compressor is the power unit of the A/C system.
It is located on the side of engine block and driven by a V-belt of the engine.
The compressor changes low pressure and low temperature refrigerant gas into high pressure and high temperature refrigerant gas.
Variable Swash Plat ...