my Toyota Highlander Fourth Generation (2020-present) has a pulsating brake pedal what does that mea...

Solution

1. Preparation

• Tools Required:
  • Socket set
  • Torque wrench
  • Brake cleaner
  • Dial indicator
  • Jack and jack stands
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.

2. Inspect and Replace Brake Pads

• Sub-steps:
  1. Remove the wheel to access the brake assembly.
  2. Unbolt the caliper and carefully hang it using a bungee cord to avoid straining the brake line.
  3. Remove the old brake pads from the caliper bracket.
  4. Install new brake pads, ensuring proper alignment and fit.
  5. Reattach the caliper and torque the bolts to the manufacturer’s specifications.

3. Inspect and Resurface or Replace Brake Rotors

• Sub-steps:
  1. Remove the brake rotor from the hub.
  2. Measure the rotor thickness with a micrometer to ensure it meets specifications.
  3. If warped, either resurface the rotors or replace them with new ones.
  4. Clean the new or resurfaced rotors with brake cleaner before installation.
  5. Reinstall the rotor and torque the retaining screws.

4. Brake Fluid Check and Replacement

• Sub-steps:
  1. Check the brake fluid reservoir for level and clarity.
  2. If fluid is contaminated, bleed the brake system using fresh DOT 3 or DOT 4 fluid.
  3. Start at the wheel farthest from the master cylinder and work towards the nearest wheel.
  4. Ensure there are no air bubbles in the fluid lines during bleeding.

5. Final Checks

• Sub-steps:
  1. Reinstall the wheel and torque lug nuts to specifications.
  2. Lower the vehicle from the jack stands.
  3. Test the brake pedal pressure and ensure it feels firm before conducting a test drive.