why do my Toyota Corolla E170 (2013-2019) brake lights stay on?

Toyota Corolla E170 (2013-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

486 words

Problem Statement

Learn how to diagnose and fix brake lights that stay on in Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms, diagnostics, and solutions.

Affected Component

Brakes

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shocks or shorts.

Symptoms

•Brake lights continuously illuminated
•Possible battery drain if left unattended
•Brake pedal feels spongy or has a delayed response
•Warning lights on the dashboard (e.g., brake system warning)
•Increased wear on brake light bulbs

Diagnostic Steps

1
Inspect the brake light switch for proper operation and adjustment.
2
Check for any foreign objects or debris preventing the brake pedal from fully returning.
3
Examine the brake pedal assembly for any signs of damage or misalignment.
4
Use an OBD-II scanner to check for any fault codes related to the brake system.
5
Inspect the wiring and connectors leading to the brake light switch for damage or corrosion.

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
•Screwdriver set
•Multimeter (for electrical testing)
•OBD-II scanner

Parts Required

•Brake light switch (if replacement is necessary)

Related Faults

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Diagnostic Steps

1
Inspect the brake light switch for proper operation and adjustment.
2
Check for any foreign objects or debris preventing the brake pedal from fully returning.
3
Examine the brake pedal assembly for any signs of damage or misalignment.
4
Use an OBD-II scanner to check for any fault codes related to the brake system.
5
Inspect the wiring and connectors leading to the brake light switch for damage or corrosion.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is off.
Disconnect the battery to prevent electrical shorts.

2. Inspect and Adjust Brake Light Switch

Locate the brake light switch, typically found above the brake pedal.
Check if the switch is properly aligned with the brake pedal arm.
- If misaligned, adjust the switch position until it makes contact when the pedal is not pressed.
If the switch appears damaged, note it for replacement.

3. Clean or Replace Brake Light Switch

If the switch is malfunctioning after adjustment, remove it from its mounting:
- Disconnect the electrical connector.
- Unscrew the switch from its bracket.
Install the new switch by reversing the removal steps:
- Securely attach the switch and connect the electrical connector.
Test the switch by pressing the brake pedal to ensure it engages and disengages properly.

4. Check Brake Pedal Return Mechanism

Inspect the brake pedal assembly for any obstructions or damage.
Ensure that the pedal has full range of motion and returns to its rest position.
If necessary, lubricate pivot points or replace any damaged components.