how to fix my Toyota Corolla E170 (2013-2019) brake pedal going to the floor?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

584 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

•Disconnect the battery before working on the brake system.
•Allow brakes to cool before touching components after driving.

Symptoms

•Brake pedal feels spongy or goes to the floor with little resistance
•Warning light on the dashboard illuminated (brake warning light)
•Reduced braking effectiveness or longer stopping distances
•Fluid leaks observed under the vehicle
•Unusual noises when pressing the brake pedal (e.g., grinding or squeaking)

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for visible leaks in the brake lines, calipers, and wheel cylinders.
3
Examine brake pads and rotors for excessive wear or damage.
4
Inspect the brake master cylinder for signs of failure or internal leaks.
5
Perform a brake system pressure test to check for leaks in the system.
6
Scan for any error codes related to the brake system using an OBD-II scanner.

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

•Brake fluid (DOT 3 or DOT 4)
•Funnel
•Rags
•Socket set
•Torque wrench
•Brake cleaner
•Wrench set
•Brake bleeder kit
•Clear tubing
•Catch bottle
•OBD-II scanner

Parts Required

•Brake fluid (DOT 3 or DOT 4)
•New brake pads
•New brake rotors
•New master cylinder (if needed)

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Symptoms

•Brake pedal feels spongy or goes to the floor with little resistance

•Warning light on the dashboard illuminated (brake warning light)

•Reduced braking effectiveness or longer stopping distances

•Fluid leaks observed under the vehicle

•Unusual noises when pressing the brake pedal (e.g., grinding or squeaking)

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for visible leaks in the brake lines, calipers, and wheel cylinders.
3
Examine brake pads and rotors for excessive wear or damage.
4
Inspect the brake master cylinder for signs of failure or internal leaks.
5
Perform a brake system pressure test to check for leaks in the system.
6
Scan for any error codes related to the brake system using an OBD-II scanner.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is on a flat surface and secure it with wheel chocks.
Disconnect the negative battery terminal to avoid electrical issues.

2. Inspect and Replace Brake Fluid

Tools Required: Brake fluid (DOT 3 or DOT 4), funnel, rags
Check the brake fluid level in the master cylinder reservoir. If low, top off with the appropriate brake fluid.
If the fluid is dirty or contaminated, proceed to flush the brake system.

3. Inspect and Replace Brake Components

Tools Required: Socket set, torque wrench, brake cleaner, new brake pads and rotors if needed
Remove the wheel to access the brake assembly.
Inspect the brake pads for thickness; replace if worn below 3mm.
Check the brake rotors for warping or scoring; replace if necessary.
Reassemble the brake components and torque to manufacturer specifications.

4. Check and Replace Master Cylinder

Tools Required: Wrench set, brake fluid, new master cylinder if needed
Remove the master cylinder from the brake booster by disconnecting the brake lines and unbolting it.
Inspect for internal leaks; if found, replace the master cylinder.
Reinstall the new or rebuilt master cylinder, ensuring all connections are tight.

5. Bleed the Brake System

Tools Required: Brake bleeder kit or clear tubing, catch bottle
Bleed the brake lines starting from the furthest wheel (right rear) to the closest (left front).
Ensure no air bubbles are present in the brake fluid during the process.
Check the pedal feel and ensure it is firm after bleeding.