why does my brake light stay on in my Toyota Corolla E170 (2013-2019)?

Toyota Corolla E170 (2013-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

576 words

Problem Statement

Learn how to diagnose and fix the brake light staying on in your 2013-2019 Toyota Corolla E170. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always disconnect the battery before working on electrical components.
•Ensure the vehicle is securely supported before working underneath.

Symptoms

•Brake light remains illuminated on the dashboard
•Brake fluid level may be low
•Possible warning message displayed on the instrument cluster
•Potential for decreased braking performance
•Unusual noises when applying brakes (e.g., grinding or squeaking)

Diagnostic Steps

1
Inspect the brake fluid reservoir for low fluid levels and check for leaks.
2
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes related to the braking system.
3
Check the brake light switch located near the brake pedal for proper operation and adjustment.
4
Examine the brake pads for wear and ensure they are not worn down to the indicators.
5
Test the brake system for any air in the lines or issues with the brake master cylinder.

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

•OBD-II scanner
•Multimeter
•Brake bleeder kit
•Socket set
•Jack and jack stands

Parts Required

•Brake light switch (if faulty)
•Brake fluid (DOT 3 or DOT 4)
•Brake pads (if worn)

Related Faults

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Diagnostic Steps

1
Inspect the brake fluid reservoir for low fluid levels and check for leaks.
2
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes related to the braking system.
3
Check the brake light switch located near the brake pedal for proper operation and adjustment.
4
Examine the brake pads for wear and ensure they are not worn down to the indicators.
5
Test the brake system for any air in the lines or issues with the brake master cylinder.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface with the engine off and the parking brake engaged.
Wear safety gloves and goggles for protection.

2. Check Brake Fluid Level

Open the hood and locate the brake fluid reservoir.
Inspect the fluid level; if it is below the minimum mark, top it up with the appropriate brake fluid (DOT 3 or DOT 4 as specified).
Check for any visible leaks around brake lines and connections.

3. Inspect the Brake Light Switch

Locate the brake light switch, usually positioned above the brake pedal.
Disconnect the switch connector and use a multimeter to test for continuity with the pedal up and down.
If the switch is faulty or malfunctioning, remove it by unscrewing it from its mounting and replace it with a new switch.

4. Inspect Brake Pads

Raise the vehicle using a jack and secure it with jack stands.
Remove the front wheels to access the brake pads.
Inspect the thickness of the pads; if they are worn below the minimum thickness (usually around 3mm), replace them.
Reassemble the wheels and lower the vehicle.

5. Test and Bleed Brake System (if necessary)

If air is suspected in the brake lines, bleed the brake system using a brake bleeder kit.
Start with the brake furthest from the master cylinder (usually the passenger rear) and work your way to the closest (driver front).
Ensure to keep the brake fluid reservoir filled during this process to avoid introducing air into the system.