how to fix Toyota Highlander Third Generation (2014-2019) traction control light on

Toyota Highlander Third Generation (2014-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

570 words

Problem Statement

Learn how to diagnose and fix the traction control light issue in Toyota Highlander (2014-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Brakes

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the vehicle to cool down before performing any inspections or repairs related to the brakes or tires.

Symptoms

•Traction control light illuminated on the dashboard
•Reduced acceleration or power delivery
•Unusual wheel slippage during acceleration
•Increased engine noise when traction control engages
•Possible warning lights for ABS or Check Engine light

Diagnostic Steps

1
Scan the vehicle's onboard computer with an OBD-II scanner to retrieve any stored error codes.
2
Inspect the wheel speed sensors visually for any signs of damage, dirt, or disconnection.
3
Check the brake fluid level and condition, as low fluid can affect the ABS and traction control systems.
4
Test the operation of the traction control system by performing a controlled test drive on a slippery surface.
5
Inspect the vehicle's fuses related to the traction control and ABS systems for any blown fuses.
6
Verify the condition of the tires, ensuring they have adequate tread depth and are properly inflated.

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
•Socket set
•Torque wrench
•Multimeter

Parts Required

•Wheel speed sensor (if faulty)
•Brake fluid (if low)
•Replacement fuses (if blown)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan the vehicle's onboard computer with an OBD-II scanner to retrieve any stored error codes.
2
Inspect the wheel speed sensors visually for any signs of damage, dirt, or disconnection.
3
Check the brake fluid level and condition, as low fluid can affect the ABS and traction control systems.
4
Test the operation of the traction control system by performing a controlled test drive on a slippery surface.
5
Inspect the vehicle's fuses related to the traction control and ABS systems for any blown fuses.
6
Verify the condition of the tires, ensuring they have adequate tread depth and are properly inflated.

Solution

1. Preparation

Gather necessary tools and equipment.
Ensure the vehicle is parked on a flat surface and the parking brake is engaged.
Disconnect the negative battery terminal to prevent electrical issues during repairs.

2. Error Code Resolution

Reconnect the OBD-II scanner and clear any error codes.
Take the vehicle for a test drive to see if the traction control light returns.
If the light stays off, monitor the vehicle for any signs of malfunction.

3. Wheel Speed Sensor Replacement (if necessary)

Tools Required: Socket set, torque wrench, multimeter.
Remove the wheel by loosening the lug nuts and using a jack to lift the vehicle.
Unbolt the wheel speed sensor from its mounting location.
Disconnect the electrical connector from the sensor.
Install the new wheel speed sensor by reversing the removal steps, ensuring proper torque specifications are followed.
Reconnect the electrical connector and reattach the wheel.

4. Brake Fluid and Fuse Check

Inspect the brake fluid reservoir for proper fluid level; refill with the manufacturer-recommended brake fluid if low.
Check the fuses associated with the traction control system; replace any blown fuses with equivalent-rated fuses.

5. Tire Inspection and Replacement

Inspect all tires for proper tread depth and sidewall damage.
Replace any damaged tires and ensure all tires are inflated to the manufacturer's specifications.