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

4 min read

630 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 components.
•Ensure the vehicle is securely raised on jack stands if working underneath.
•Allow brake components to cool before handling.

Symptoms

•Brake pedal sinks to the floor with little to no resistance
•Warning light on the dashboard illuminated (if applicable)
•Possible fluid leak under the vehicle
•Reduced braking power or effectiveness
•Air hissing noise when the brake pedal is pressed (indicating air in the system)

Diagnostic Steps

1
Check the brake fluid level in the master cylinder reservoir.
2
Inspect for any visible brake fluid leaks around the brake lines, calipers, and master cylinder.
3
Use a brake fluid tester to check for moisture or contamination in the brake fluid.
4
Examine the brake lines for any signs of wear, corrosion, or damage.
5
Inspect the brake master cylinder for signs of failure or internal leakage.
6
Check the brake booster for operation if the vehicle has power brakes.

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
•Flare wrench
•Brake bleeder kit
•Torque wrench
•Brake fluid tester

Parts Required

•Brake master cylinder (if replacement is necessary)
•Brake lines (if damaged)
•Brake fluid

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Diagnostic Steps

1
Check the brake fluid level in the master cylinder reservoir.
2
Inspect for any visible brake fluid leaks around the brake lines, calipers, and master cylinder.
3
Use a brake fluid tester to check for moisture or contamination in the brake fluid.
4
Examine the brake lines for any signs of wear, corrosion, or damage.
5
Inspect the brake master cylinder for signs of failure or internal leakage.
6
Check the brake booster for operation if the vehicle has power brakes.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Wear safety glasses and gloves for protection.

2. Inspect and Repair Leaks

Locate Leaks: Visually inspect all brake lines, calipers, and the master cylinder for any signs of fluid leakage.
Tighten Connections: If leaks are found at connections, use a wrench to tighten them.
Replace Damaged Lines: If any brake lines are damaged, replace them with new lines. Cut the old line, and install the new line using appropriate fittings.

3. Replace the Master Cylinder (if necessary)

Remove the Old Master Cylinder:
- Disconnect the brake lines from the master cylinder using a flare wrench.
- Remove the mounting bolts securing the master cylinder to the brake booster.
- Carefully pull the master cylinder away from the brake booster.
Install the New Master Cylinder:
- Position the new master cylinder onto the brake booster and secure it with mounting bolts (torque to manufacturer specifications).
- Reconnect the brake lines, ensuring they are tight and leak-free.

4. Bleed the Brakes

Prepare for Bleeding:
- Have a helper assist or use a brake bleeder kit.
- Start at the wheel farthest from the master cylinder (usually the right rear wheel).
Bleed Each Brake:
- Attach the bleeder hose to the wheel cylinder bleeder screw.
- Have your helper press the brake pedal and hold it down.
- Open the bleeder screw to release fluid and air, then close it while your helper releases the brake pedal.
- Repeat until no air bubbles are present in the fluid. Move to the next wheel (left rear, right front, then left front) in that order.