my Toyota Highlander Fourth Generation (2020-present) feels like it's losing traction, what's wrong

Toyota Highlander Fourth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

579 words

Problem Statement

Learn how to diagnose and fix loss of traction issues in the 2020-present Toyota Highlander. 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 systems.
•Allow the vehicle to cool before inspecting or repairing the brake system.

Symptoms

•Traction control light illuminated on the dashboard
•Slipping or spinning of wheels during acceleration
•Unusual noises from the drivetrain or wheels when traction is lost
•Vehicle struggling to maintain grip on wet or slippery surfaces
•Decreased stability during cornering or turning

Diagnostic Steps

1
Scan the vehicle's OBD-II system for any error codes related to the traction control system.
2
Check the condition and pressure of all tires to ensure they are within manufacturer specifications.
3
Inspect the brake system for any stuck calipers or worn brake pads that could affect traction.
4
Examine the traction control sensor and wheel speed sensors for proper operation and alignment.
5
Test the functionality of the Electronic Stability Control (ESC) system to ensure it is engaging correctly.
6
Inspect the differential and drivetrain components for any signs of wear or damage.

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
•Tire pressure gauge
•Jack and jack stands
•Socket set
•Multimeter

Parts Required

•Tires (if needed)
•Brake pads (if needed)
•Brake calipers (if needed)
•Wheel speed sensors (if needed)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for any error codes related to the traction control system.
2
Check the condition and pressure of all tires to ensure they are within manufacturer specifications.
3
Inspect the brake system for any stuck calipers or worn brake pads that could affect traction.
4
Examine the traction control sensor and wheel speed sensors for proper operation and alignment.
5
Test the functionality of the Electronic Stability Control (ESC) system to ensure it is engaging correctly.
6
Inspect the differential and drivetrain components for any signs of wear or damage.

Solution

1. Preparation

Tools Required: OBD-II scanner, tire pressure gauge, jack and jack stands, socket set, multimeter.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the negative battery terminal to ensure safety during repairs.

2. Tire Inspection and Replacement

Sub-steps:
1. Use a tire pressure gauge to check the pressure of all tires. Inflate or deflate as necessary to match manufacturer specifications.
2. Visually inspect the tread depth and condition of each tire. Replace any tires that are worn or damaged.
3. If tires are rotated or replaced, ensure they are balanced properly and aligned correctly.

3. Brake System Inspection and Repairs

Sub-steps:
1. Remove the wheel to access the brake components.
2. Inspect brake pads for wear; replace if less than 3mm thick.
3. Check calipers for proper movement; lubricate or replace if necessary.
4. Reinstall the wheel and torque lug nuts to the manufacturer’s specifications.

4. Sensor and System Testing

Sub-steps:
1. Use the OBD-II scanner to clear any fault codes.
2. Test the wheel speed sensors with a multimeter to ensure they are providing accurate readings.
3. Reconnect the battery and perform a test drive to monitor traction control engagement.

5. Drivetrain Inspection

Sub-steps:
1. Inspect the differential fluid level; top up or replace with the recommended fluid if low or dirty.
2. Examine the driveshaft and CV joints for any signs of damage or wear.
3. If any components are found to be defective, replace them according to manufacturer specifications.