1. Insufficient braking | (1) Fluid leakage from the hydraulic mechanism | Repair or replace. (cup, piston seal, piston boot, master cylinder piston kit, pipe or hose) |
(2) Entry of air into the hydraulic mechanism | Bleed air. |
(3) Wear, deteriorated surface material, water or fluid on pad | Replace and clean. |
(4) Improper operation of master cylinder assembly, disc caliper, vacuum booster assembly or check valve | Repair or replace. |
2. Unstable or uneven braking | (1) Fluid on pad or rotor | Correct the cause of fluid leakage, and replace. |
(2) Rotor defective | Repair or replace the rotor. |
(3) Improper pad contact, deteriorated surface, deteriorated or worn pad material | Replace. |
(4) Deformed back plate | Repair or replace. |
(5) Overinflation of tires | Adjust the air pressure. |
(6) Defective wheel alignment | Adjust alignment. |
(7) Loose back plate or support installation bolt | Tighten to the specified torque. |
(8) Defective hub unit COMPL | Replace. |
(9) Defective hydraulic system | Replace the cylinder, brake pipe or hose. |
(10) Unstable performance of the parking brake | Check, adjust or replace the rear brake. |
3. Excessive pedal stroke | (1) Entry of air into the hydraulic mechanism | Bleed air. |
(2) Excessive play in the master cylinder push rod | Adjust. |
(3) Fluid leakage from the hydraulic mechanism | Repair or replace. (cup, piston seal, piston boot, master cylinder piston kit, pipe or hose) |
(4) Improper pad contact or worn pad | Repair or replace. |
4. Brake dragging or improper brake return | (1) Insufficient pedal play | Adjust play. |
(2) Improper master cylinder return | Clean or replace the cylinder. |
(3) Clogged hydraulic system | Replace. |
(4) Improper return of parking brake | Repair or replace. |
(5) Improper disc caliper operation | Repair or replace. |
(6) Faulty wheel bearing | Replace. |
5. Brake noise (1) (creaking sound) | (1) Hardened or deteriorated brake pad | Replace the pad. |
(2) Worn brake pad | Replace the pad. |
(3) Loose back plate or support installation bolt | Tighten to the specified torque. |
(4) Loose hub unit COMPL | Tighten to the specified torque. |
(5) Dirty rotor | Clean the rotor, or clean and replace brake assembly. |
6. Brake noise (2) (hissing sound) | (1) Worn brake pad | Replace the pad. |
(2) Improperly installed pad | Correct or replace the pad. |
(3) Loose or bent rotor | Retighten or replace. |
7. Brake noise (3) (click sound) | Excessively worn pad or support | Replace the pad or the support. |
Air bleeding procedure
Brake booster