why does my Toyota Highlander XU70 (2020-Present) have a soft brake pedal

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the negative battery terminal to prevent electrical issues.

2. Check and Replenish Brake Fluid

• Tools Required: Clean cloth, funnel
• Inspect the brake fluid level in the master cylinder reservoir; add manufacturer-recommended brake fluid if low.
• Clean any spilled brake fluid immediately to prevent damage to vehicle surfaces.

3. Bleed the Brake System

• Tools Required: Brake bleeder kit, clear tubing, container
• Attach the clear tubing to the bleeder valve on the brake caliper.
• Have an assistant press the brake pedal several times and hold it down.
• Open the bleeder valve to allow fluid and air to escape; close the valve before releasing the pedal.
• Repeat this process until no air bubbles are present in the fluid.

4. Inspect Brake Components

• Tools Required: Socket set, torque wrench
• Remove the wheel to access the brake assembly.
• Inspect brake pads for thickness; replace if worn below the minimum thickness.
• Measure rotor thickness; resurface or replace rotors if they are below specifications.
• Ensure all components are properly torqued to manufacturer specifications.

5. Test the Vacuum Booster

• Tools Required: Hand-held vacuum pump
• Disconnect the vacuum line from the brake booster.
• Attach the vacuum pump and create a vacuum.
• Monitor if the vacuum holds; if it drops quickly, the booster may be faulty and needs replacement.