how to fix brake pedal that goes to the floor in Toyota Corolla E170 (2013-2019)?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

591 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 a brake pedal that goes to the floor in a 2013-2019 Toyota Corolla E170. Step-by-step guide with tools and procedures.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on the braking system to prevent electrical issues.
•Allow the brake system to cool if it has been recently used to avoid burns.

Symptoms

•Brake warning light illuminated on the dashboard
•Spongy or unresponsive brake pedal
•Increased stopping distance
•Brake fluid leak under the vehicle
•Unusual noises when braking (e.g., grinding or squeaking)

Diagnostic Steps

1
Inspect brake fluid level in the reservoir; ensure it is at the recommended level.
2
Examine brake lines and hoses for visible leaks or damage.
3
Check for any air in the brake lines by performing a brake pedal pump test.
4
Inspect the master cylinder for signs of failure or leakage.
5
Confirm the condition of brake pads and rotors for wear.
6
Scan the vehicle for any diagnostic trouble codes (DTCs) related to the braking system.

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 line cutter
•Socket set
•Brake line wrench
•Fluid siphon
•Brake bleeder kit

Parts Required

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

Related Faults

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Diagnostic Steps

1
Inspect brake fluid level in the reservoir; ensure it is at the recommended level.
2
Examine brake lines and hoses for visible leaks or damage.
3
Check for any air in the brake lines by performing a brake pedal pump test.
4
Inspect the master cylinder for signs of failure or leakage.
5
Confirm the condition of brake pads and rotors for wear.
6
Scan the vehicle for any diagnostic trouble codes (DTCs) related to the braking system.

Solution

1. Preparation

Gather necessary tools and parts for the repair.
Ensure the vehicle is parked on a level surface and set the parking brake.
Wear safety goggles and gloves.

2. Inspect and Repair Brake Lines

Sub-steps:
- Lift the vehicle using a jack and secure it with jack stands.
- Visually inspect the brake lines and hoses for any signs of wear or leaks.
- If leaks are found, replace the damaged brake lines or hoses with new ones.
Tools Required: Wrench set, brake line cutter, new brake line or hose.

3. Check and Replace Master Cylinder

Sub-steps:
- Disconnect the negative battery terminal to prevent electrical shorts.
- Remove the brake fluid reservoir cap and siphon out old fluid.
- Unbolt the master cylinder from the brake booster and disconnect the brake lines.
- Install the new master cylinder and reconnect the brake lines securely.
- Refill the brake fluid reservoir with new brake fluid (DOT 3 or DOT 4 as specified).
Tools Required: Socket set, brake line wrench, fluid siphon.

4. Bleed the Brake System

Sub-steps:
- Start at the wheel farthest from the master cylinder (usually the right rear).
- Attach a clear tube to the brake bleeder screw and place the other end in a container.
- Have an assistant pump the brake pedal several times and hold it down.
- Open the bleeder screw to allow air and fluid to escape; close the screw before the pedal is released.
- Repeat until no air bubbles are present and the fluid runs clear; continue to the next wheel in order.
Tools Required: Brake bleeder kit, wrench for bleeder screws.