2001 Hyundai Accent Brakes
ACCENT(LC) > 2001 > G 1.5 SOHC > Brake System
Brake System > General Information > Special Service Tools
SPECIAL TOOLS
| TOOL(Numberand name) | ILLUSTRATION | USE |
|---|---|---|
| 09581 ~ 11000 Piston expander | Spreading the front disc brake piston. |
Table Caption: This table lists tools, identified by their number and name, and describes their use, with an example of a piston expander for spreading front disc brake pistons.
Brake System > General Information > Troubleshooting
TROUBLESHOOTING
| SYMPTOM | PROBABLECAUSE | REMEDY |
|---|---|---|
| Noise or vibration when brakes are applied | Backing plate or caliper improperly mounted Loose backing plate or caliper mounting bolts Unevenly worn or cracked brake drum or brake disc Foreign material in brake drum Seized pad or lining contact surface Excessive caliper to pad assembly clearance Uneven pad contact Lack of lubrication in sliding parts Loose suspension parts | Correct Retighten Replace Clean Replace Correct Correct Lubricate Retighten |
| Vehicle pulls to one side when brakes are applied | Difference between left and right tire inflation pressure Improper front wheel alignment Inadequate contact of pad or lining Grease or oil on pad or lining surface Drum warpage or uneven wear Incorrect wheel cylinder installation Auto adjuster malfunction | Adjust Adjust Correct Replace Replace Correct Correct |
| Insufficient braking power | Low or deteriorated brake fluid Air in the brake system Brake booster malfunction Inadequate contact of pad or lining Grease or oil on pad or lining surface Auto adjuster malfunction Overheated brake rotor due to dragging of pad or lining | Refill or change Bleed the system Correct Correct Replace Correct Correct Replace Replace |
Table Caption: This table outlines common brake system symptoms, their probable causes, and the corresponding remedies.
| Restricted brake line Proportioning valve malfunction | ||
|---|---|---|
| Increased pedal stroke required (Reduced pedal to floorboard clearance) | Air in the system Brake fluid leakage Auto adjuster malfunction Excessive push rod to master cylinder clearance | Bleed the system Correct Correct Adjust |
| Brake drag | Incomplete release of parking brake Incorrect parking brake adjustment Worn brake pedal return spring Restricted master cylinder return port Broken rear drum brake shoe return spring Lack of lubrication in sliding parts Defective master cylinder check valve or piston return spring Insufficient push rod to master cylinder clearance | Adjust Adjust Replace Correct Replace Lubricate Replace Replace |
| Insufficient parking brake function | Worn brake lining or pad Grease or oil on lining or pad surface Parking brake cable sticking Auto adjuster malfunction Excessive parking brake lever stroke | Replace Replace Replace Adjust Adjust the parking brake lever stroke or check the parking brake cable routing |
Table Caption: This table outlines common brake system malfunctions related to brake pedal feel, brake drag, and parking brake function, along with their potential causes and recommended corrective actions. It serves as a diagnostic guide for identifying and resolving issues within the braking system.
Brake System > General Information > Repair procedures
ADJUSTMENT PROCEDURE
BRAKE PEDAL HEIGHT ADJUSTMENT
- Remove the carpet and measure the brake pedal height. If the height is over the standard value, adjust it as the following procedures.
157.1(+5,0) mm [6.19 (+0.2,0) in.]
- (1) Disconnect the stop lamp switch connector, loosen the stop lamp switch lock nut, and back off the stop switch until it doesn't reach the brake pedal arm.
- (2) Loosen the push rod lock nut, and screw the push rod in or out with pliers until the standard pedal height from the floor is reached.
- (3) Turn the stop lamp switch until clearance between the stop lamp switch outer case and stopper becomes 0.5~1.0mm.
- Tighten the lock nut firmly.
NOTE
Brake pedal stroke should be 125.6mm (4.95 in.) or more. If the brake pedal stroke is not 125.6mm or more, readust the brake pedal height and stop lamp switch clearance.
-
(4) Connect the stop lamp switch connector.
-
(5) Make sure that the stop lamps go off when the brake pedal is released.
-
(6) With the engine off, depress the pedal 2~3 time to get rid of pressure, and then inspect the play on the pedal by pushing it by hand.
3 ~ 8 mm (0.11 ~0.31 in.)
BRAKE BOOSTER OPERATION TEST WITHOUT A TESTER
- Run the engine for one or two minutes, and then shut it off. Depress the brake pedal several times at normal foot pressure. If the pedal goes down further at first but rises gradually after the second or third time, the brake booster is functioning properly. If the pedal height doesn't change, the booster is damaged.
- With the engine off, depress the brake pedal several times and check on the pedal height change. After that, with the pedal depressed, start the engine. If the pedal goes down slightly, the booster is on good condition. If the pedal height doesn't change, the booster is damaged.
- With the engine running, depress the brake pedal and then stop the engine. Hold the pedal depressed for 30 seconds. If the pedal height does not change, the booster is in good condition. If the pedal goes up, the booster is damaged.
f one of the above three tests is not okey, check the vacuum hoses and the brake booster and make any necessary corrections. If all tests are OK, the booster is good.
1. Remove the vacuum hose.
2. Check the operation of the check valve by using a vacuum pump.
| Vacuumpumpconnection | Accept/Reject criteria |
|---|---|
| Connection at the brake booster side (A) | Anegative pressure(vacuum) is created and held |
| Connection at the intake manifold side (B) | Anegative pressure(vacuum) is not created |
Table Caption: This table outlines the accept/reject criteria for a vacuum pump connection, specifying that a negative pressure must be created and held at the brake booster side (A) but not at the intake manifold side (B).
BLEEDING THE BRAKE SYSTEM
- Remove the reservoir cap and fill the brake reservoir with brake fluid.
- Connect a
