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

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

599 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 negative battery terminal before working on the brake system.
•Allow the brake system to cool down before working on it after a drive.

Symptoms

•Brake pedal feels soft or spongy
•Brake warning light illuminated on the dashboard
•Reduced braking effectiveness
•Fluid leak under the vehicle
•Air hissing sound when pressing the pedal

Diagnostic Steps

1
Check the brake fluid level in the master cylinder reservoir.
2
Inspect brake lines and hoses for visible leaks or damage.
3
Examine brake calipers and wheel cylinders for signs of leakage.
4
Inspect the brake master cylinder for internal failure or leaks.
5
Scan for error codes using an OBD-II scanner (if applicable).
6
Perform a brake bleed to check for air in the brake lines.

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

•Wrench set
•Brake bleeder kit
•Jack and jack stands
•Socket set

Parts Required

•Brake fluid
•Replacement brake lines (if damaged)
•Brake master cylinder (if faulty)

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Diagnostic Steps

1
Check the brake fluid level in the master cylinder reservoir.
2
Inspect brake lines and hoses for visible leaks or damage.
3
Examine brake calipers and wheel cylinders for signs of leakage.
4
Inspect the brake master cylinder for internal failure or leaks.
5
Scan for error codes using an OBD-II scanner (if applicable).
6
Perform a brake bleed to check for air in the brake lines.

Solution

1. Preparation

Gather tools and parts needed for the repair:
- Tools: Wrench set, brake bleeder kit, jack and jack stands, socket set
- Parts: Brake fluid, replacement brake lines (if damaged), master cylinder (if faulty)
Ensure the vehicle is parked on a level surface and the parking brake is engaged.

2. Inspect and Repair Brake Lines

Sub-steps:
1. Lift the vehicle using a jack and secure it with jack stands.
2. Visually inspect all brake lines and hoses for leaks, corrosion, or damage.
3. If any lines are damaged, remove the old brake line using a wrench and install the new line, ensuring all connections are tight.
4. Use brake fluid to clean any spilled fluid to prevent damage to vehicle paint.

3. Replace the Master Cylinder (if necessary)

Sub-steps:
1. Disconnect the negative battery terminal.
2. Remove the brake fluid reservoir cap and siphon out old brake fluid.
3. Disconnect brake line fittings from the master cylinder using a wrench.
4. Remove the master cylinder mounting bolts and take out the old master cylinder.
5. Install the new master cylinder and torque the mounting bolts to the manufacturer’s specifications.
6. Reconnect the brake line fittings and ensure they are properly tightened.

4. Bleed the Brake System

Sub-steps:
1. Refill the master cylinder with new brake fluid.
2. Using a brake bleeder kit, start bleeding the brakes from the furthest wheel (usually the passenger rear) to the nearest (driver front).
3. Have an assistant press the brake pedal while you open and close the bleeder valve to expel air and old fluid.
4. Repeat until the fluid runs clear and free of bubbles.
5. Check fluid levels in the master cylinder throughout the process and refill as needed.