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

4 min read

625 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 disconnect the battery before working on electrical systems.
•Allow the vehicle to cool down before performing any maintenance on the brakes.

Symptoms

•Brake pedal feels spongy or goes to the floor when pressed
•Brake warning light illuminated on the dashboard
•Reduced braking power or ineffective brakes
•Fluid leakage visible around the wheels or under the vehicle
•Unusual noises (e.g., grinding) when braking

Diagnostic Steps

1
Inspect the brake fluid reservoir for low fluid levels.
2
Check for visible leaks in the brake lines, around the wheels, and at the master cylinder.
3
Use a brake fluid tester to check for moisture content in the brake fluid.
4
Inspect the condition of the brake pads and rotors for wear.
5
Bleed the brake lines to remove any air that may have entered the system.
6
Test the master cylinder for failure by performing a push test (holding pedal down for 30 seconds to see if it sinks).

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 tester
•Wrench set
•Brake bleeder kit
•Funnel

Parts Required

•Brake fluid (DOT 3 or DOT 4)
•Brake line repair kit (if leaks are found)
•New master cylinder (if required)

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Diagnostic Steps

1
Inspect the brake fluid reservoir for low fluid levels.
2
Check for visible leaks in the brake lines, around the wheels, and at the master cylinder.
3
Use a brake fluid tester to check for moisture content in the brake fluid.
4
Inspect the condition of the brake pads and rotors for wear.
5
Bleed the brake lines to remove any air that may have entered the system.
6
Test the master cylinder for failure by performing a push test (holding pedal down for 30 seconds to see if it sinks).

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is on a level surface, and secure it with wheel chocks.
Wear safety gloves and goggles.

2. Check and Refill Brake Fluid

Tools Required: Brake fluid, funnel
Remove the brake fluid reservoir cap and check the fluid level.
If low, add the appropriate brake fluid (DOT 3 or DOT 4 as specified in the owner's manual) until it reaches the full mark.

3. Inspect and Repair Leaks

Tools Required: Wrench set, brake line repair kit (if needed)
Visually inspect all brake lines and connections for leaks.
If leaks are found, tighten loose fittings or replace damaged brake lines and fittings.

4. Bleed Brake Lines

Tools Required: Brake bleeder kit, wrench
Start at the wheel farthest from the master cylinder (usually the right rear).
Attach the bleeder kit and have an assistant pump the brake pedal several times, then hold it down.
Open the bleeder valve to allow air and fluid to escape, then close it before your assistant releases the pedal.
Repeat until clear fluid is seen without air bubbles, then move to the next wheel.

5. Replace Master Cylinder (if necessary)

Tools Required: Wrench set, brake line wrench, new master cylinder, brake fluid
Disconnect the negative battery terminal.
Remove the brake lines from the master cylinder using a brake line wrench.
Remove the master cylinder mounting bolts and carefully detach it from the brake booster.
Install the new master cylinder by reversing the removal steps and ensuring proper torque specifications for mounting bolts.