Brake system — malfunctions (Hyundai Elantra J2)

Sign of malfunction	Possible cause	Method of elimination
When braking, the car deviates to one side	Presence of grease or oil on the surface of the brake lining	Replacement of the lining
	Incorrect contact of the brake lining with the brake disc or drum	Adjust contact
	Malfunction of the automatic transmission, brake regulator	Adjust
	Brake drum eccentricity or uneven wear	Repair or Replace
Insufficient braking force	Low brake fluid level or contamination	Topping up or replacing fluid
	Presence of air in the brakes	Pumping the system
	Overheating of the brake rotor due to seizure of the brake linings	Adjust
	Presence of grease or oil on the brake linings	Replacement of linings
	Poor contact of brake pads with disc or drum	Adjust
	Brake booster malfunction	Adjust
	Clogged brake line	Blowing
	Defective metering valve	Valve replacement
Increased brake pedal travel	Presence of air in the brake system	Pumping the system
	Wear of brake linings	Replacement
	Damage to the vacuum hose	Replacement
	Brake fluid leak	Elimination
	Malfunction of automatic. brake regulator	Adjust
	Increased clearance between the pushrod and the master cylinder	Adjust
	Master brake cylinder failure	Replacement
Brake drag	Incomplete release of wheels when applying the handbrake	Adjust
	Incorrect parking brake adjustment	Adjust
	Brake pedal return spring defective	Replacement
	Wear and damage to the return spring of the rear drum brake shoes	Replacement
	Lack of lubrication in moving parts	Lubricate
	Incorrect clearance between the tappet and the brake master cylinder	Adjust
	Damage to the return spring of the master brake cylinder piston	Replacing the spring
Brakes grabbing while driving	The parking brake does not release completely	Correction
	Incorrect parking brake adjustment	Adjust
	The brake pedal return spring is weak	Replacing the spring
	The return line of the master cylinder is clogged	To correct
	Defective return spring of rear drum brake mechanism	Replacement
	Lack of lubrication in rubbing parts	Lubricate
	The master cylinder check valve or piston return spring is faulty	Replacement
	Insufficient clearance between the rod and the master cylinder	Adjust
Poor parking brake performance	Wear of brake linings	Replacement
	Excessive travel of the parking brake lever	Adjust the lever stroke
	Grease or oil getting on the surface of the brake pad	Replacement of the lining
	Automatic malfunction. brake regulator	Adjust
	Parking brake cable jammed	Replacing the cable