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

577 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 electrical components.
•Allow brake components to cool before handling.

Symptoms

•Brake pedal feels spongy or goes to the floor with minimal pressure
•Warning light on the dashboard illuminated
•Reduced braking effectiveness
•Brake fluid leak observed under the vehicle
•Unusual noises when pressing the brake pedal

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for visible leaks in brake lines, calipers, and wheel cylinders.
3
Examine brake pads and rotors for wear and damage.
4
Inspect the brake master cylinder for signs of failure or leaks.
5
Use an OBD-II scanner to check for related error codes.

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
•Wrench set
•Brake fluid
•OBD-II scanner
•Brake bleeder kit
•Jack and jack stands

Parts Required

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

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Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for visible leaks in brake lines, calipers, and wheel cylinders.
3
Examine brake pads and rotors for wear and damage.
4
Inspect the brake master cylinder for signs of failure or leaks.
5
Use an OBD-II scanner to check for related error codes.

Solution

1. Preparation

Tools Required: Socket set, wrench set, brake fluid, OBD-II scanner, brake bleeder kit, jack and jack stands.
Ensure the vehicle is parked on a level surface and the engine is off.
Safety Warnings: Disconnect the battery before working on electrical components.

2. Brake Fluid Inspection

Remove the master cylinder cap and check the fluid level.
If low, top off with the appropriate brake fluid (DOT 3 or DOT 4 as specified in the owner's manual).

3. Inspect Brake System Components

Brake Lines:
- Visually inspect all visible brake lines for cracks or rust.
- Tighten any loose connections or fittings.
Calipers and Wheel Cylinders:
- Check calipers for fluid leaks.
- Look for any signs of fluid leakage around the wheel cylinders if the vehicle has drum brakes.

4. Master Cylinder Replacement (if necessary)

If the master cylinder is found to be faulty:
- Disconnect brake lines from the master cylinder.
- Remove mounting bolts and take out the old master cylinder.
- Install the new master cylinder and torque the bolts to manufacturer specifications (usually around 15-20 ft-lbs).
- Reconnect the brake lines, ensuring they are tight and leak-free.

5. Bleed the Brake System

Use a brake bleeder kit to remove air from the brake lines:
- Start at the wheel farthest from the master cylinder (usually the right rear).
- Have an assistant press the brake pedal while you open the bleeder valve, then close the valve before they release the pedal.
- Repeat until no air bubbles are observed in the fluid stream.
- Move to the next wheel in this order: right rear, left rear, right front, left front.