Brake booster malfunction
- Inspect the booster operation.
- Replace as necessary.
Hydraulic system malfunction
- Inspect the hydraulic system and repair as necessary.
Piston sticking or malfunction of caliper and wheel cylinder
- Disassemble and assemble the caliper and wheel cylinder
Brake booster vacuum leakage
- Inspect the vacuum hose for breakage and looseness.
Brake pad and lining failure