my Toyota Corolla E170 (2013-2019) brake pedal goes to the floor, what should I do?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

594 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix the brake pedal going to the floor in a 2013-2019 Toyota Corolla E170. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always wear safety goggles when working on brake systems to protect your eyes from fluid and debris.
•Ensure the vehicle is secure and on a level surface before starting repairs.

Symptoms

•Brake pedal feels soft or sinks to the floor
•Warning light for brakes illuminated on the dashboard
•Reduced braking efficiency
•Brake fluid leaking under the vehicle
•Unusual noise when pressing the brake pedal

Diagnostic Steps

1
Inspect the brake fluid reservoir for low fluid levels.
2
Check for visible leaks in brake lines, hoses, and around the brake calipers.
3
Inspect the brake master cylinder for signs of failure or leaks.
4
Examine the brake pads and rotors for excessive wear.
5
Use a pressure gauge to test brake line pressure if necessary.
6
Scan the vehicle's OBD-II system for any brake-related error codes.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Socket set
•Torque wrench
•Line wrenches
•Brake bleeder kit
•Safety goggles

Parts Required

•Brake fluid (DOT 3 or DOT 4)
•Replacement brake lines or hoses (if damaged)
•New master cylinder (if necessary)

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Diagnostic Steps

1
Inspect the brake fluid reservoir for low fluid levels.
2
Check for visible leaks in brake lines, hoses, and around the brake calipers.
3
Inspect the brake master cylinder for signs of failure or leaks.
4
Examine the brake pads and rotors for excessive wear.
5
Use a pressure gauge to test brake line pressure if necessary.
6
Scan the vehicle's OBD-II system for any brake-related error codes.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is parked on a level surface and secure it with wheel chocks.
Disconnect the battery to prevent any electrical issues.

2. Check and Refill Brake Fluid

Locate the brake fluid reservoir.
If the fluid is low, refill it with the correct type of brake fluid (DOT 3 or DOT 4).
Inspect for any signs of leaks around the reservoir and lines.

3. Inspect and Repair Brake Lines

Visually inspect all brake lines and hoses for signs of wear or damage.
If leaks are found, replace the damaged brake line or hose.
- Tools Needed: Line wrenches, replacement brake line/hose.
- Safety Warning: Always wear safety goggles when working on brake systems.

4. Check Master Cylinder

Remove the master cylinder from the brake booster.
Inspect for leaks and internal failure; if defective, replace with a new master cylinder.
- Tools Needed: Socket set, torque wrench.
- Sub-steps:
  - Unbolt the master cylinder from the brake booster.
  - Disconnect brake lines and electrical connectors.
  - Install the new master cylinder by reversing these steps, ensuring proper torque specifications.

5. Bleed Brake System

Bleed the brake system to remove any air pockets.
- Sub-steps:
  - Start from the brake furthest from the master cylinder (usually rear passenger side).
  - Have an assistant press the brake pedal while you open the bleeder valve on the brake caliper.
  - Close the valve before the pedal is released, and repeat until no air bubbles are present.
  - Move to the next brake caliper in the order: rear driver side, front passenger side, and finally front driver side.
- Tools Needed: Brake bleeder kit.