why does my Toyota Highlander Third Generation (2014-2019) shake when I accelerate

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

544 words

Problem Statement

Learn how to diagnose and fix shaking during acceleration in the 2014-2019 Toyota Highlander. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Suspension

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always use jack stands when working under a vehicle.
•Disconnect the battery before working on electrical components.

Symptoms

•Shaking or vibration felt in the steering wheel or chassis during acceleration
•Unusual noise accompanying the shaking (e.g., grinding, clunking)
•Vibration intensity increases with speed
•Vehicle pulling to one side
•Check engine light may be illuminated (if related to engine performance)

Diagnostic Steps

1
Inspect the tires for uneven wear or damage; check tire pressure.
2
Perform a visual inspection of the suspension components for wear or damage.
3
Check the balance of the wheels and tires using a wheel balancer.
4
Scan the vehicle's computer for any diagnostic trouble codes (DTCs) using an OBD-II scanner.
5
Inspect the driveshaft and CV joints for any signs of damage or excessive play.
6
Examine the engine and transmission mounts for wear or failure.

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

•Jack and jack stands
•Lug wrench
•OBD-II scanner
•Tire pressure gauge

Parts Required

•Replacement tires (if necessary)
•Suspension components (if damaged)
•Engine or transmission mounts (if worn)

Related Faults

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Diagnostic Steps

1
Inspect the tires for uneven wear or damage; check tire pressure.
2
Perform a visual inspection of the suspension components for wear or damage.
3
Check the balance of the wheels and tires using a wheel balancer.
4
Scan the vehicle's computer for any diagnostic trouble codes (DTCs) using an OBD-II scanner.
5
Inspect the driveshaft and CV joints for any signs of damage or excessive play.
6
Examine the engine and transmission mounts for wear or failure.

Solution

1. Preparation

Tools Required: Jack and jack stands, lug wrench, OBD-II scanner, tire pressure gauge
Ensure the vehicle is parked on a flat surface and the engine is off. Engage the parking brake.

2. Tire Inspection and Replacement

Sub-steps:
1. Remove the wheel covers or hubcaps if equipped.
2. Loosen the lug nuts slightly with a lug wrench but do not remove them.
3. Use the jack to lift the vehicle and secure it with jack stands.
4. Remove the lug nuts and take off the wheels.
5. Inspect tires for uneven wear, bulges, or damage; replace if necessary.
6. If tires are in good condition, check tire pressure and inflate to the recommended PSI.

3. Wheel Balancing

Sub-steps:
1. Take the wheels to a tire shop and have them balanced.
2. Reinstall the wheels after balancing, tightening the lug nuts to the manufacturer’s specifications (typically around 80-100 ft-lbs).
3. Lower the vehicle back to the ground and replace any wheel covers or hubcaps.

4. Suspension and Drivetrain Inspection

Sub-steps:
1. Inspect all suspension components (e.g., control arms, bushings) for signs of wear or damage.
2. Check the CV joints and driveshaft for any signs of wear, cracks, or play.
3. Replace any damaged components as necessary.

5. Engine and Transmission Mounts

Sub-steps:
1. Inspect engine and transmission mounts for cracks, separation, or excessive wear.
2. Replace any worn or damaged mounts.
3. Torque the mount bolts to the manufacturer’s specifications.