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

Toyota Corolla E170 (2013-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

495 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 light issue in Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on the electrical system.
•Ensure the vehicle is securely parked to prevent rolling when working on it.

Symptoms

•Brake light remains on even when the engine is off
•Warning light on the dashboard indicating a brake issue
•Possible loss of brake fluid
•Unresponsive brake pedal or soft brake feel
•Brake fluid leak under the vehicle

Diagnostic Steps

1
Inspect the brake fluid level in the reservoir and look for leaks.
2
Check the brake light switch located near the brake pedal for proper operation.
3
Scan the vehicle’s onboard computer for any stored error codes using an OBD-II scanner.
4
Inspect the brake lights for any stuck bulbs or wiring issues.
5
Examine the brake pedal for any obstructions that may prevent the switch from resetting.
6
Test the brake light switch with a multimeter to ensure it functions correctly.

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
•Socket set
•Screwdriver set
•Brake fluid (DOT 3 or DOT 4)

Parts Required

•Brake light switch (if faulty)
•Brake fluid (if low)

Related Faults

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Diagnostic Steps

1
Inspect the brake fluid level in the reservoir and look for leaks.
2
Check the brake light switch located near the brake pedal for proper operation.
3
Scan the vehicle’s onboard computer for any stored error codes using an OBD-II scanner.
4
Inspect the brake lights for any stuck bulbs or wiring issues.
5
Examine the brake pedal for any obstructions that may prevent the switch from resetting.
6
Test the brake light switch with a multimeter to ensure it functions correctly.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and engage the parking brake.
Disconnect the negative terminal of the battery to prevent electrical shock.

2. Check Brake Fluid Level

Open the hood and locate the brake fluid reservoir.
Inspect the fluid level; if low, top off with manufacturer-recommended brake fluid (DOT 3 or DOT 4).
Look for any visible leaks under the vehicle; repair any leaks found.

3. Inspect and Replace Brake Light Switch

Locate the brake light switch near the top of the brake pedal.
Disconnect the electrical connector from the switch.
Remove the mounting bolt securing the switch and take it out.
Install the new brake light switch by reversing the removal steps.
Ensure the switch is properly adjusted so that it activates when the pedal is depressed.

4. Test Brake Lights and System

Reconnect the battery terminal.
Turn on the ignition and check if the brake lights illuminate correctly when the pedal is pressed.
Ensure the brake light does not stay on when the pedal is released.