my Toyota Highlander shakes when accelerating what could be wrong

Toyota Highlander Third Generation (2014-2019)

Error Codes

3-5 hours

Time

medium

Difficulty

medium

Severity

3 min read

448 words

Problem Statement

Learn how to diagnose and fix shaking during acceleration in Toyota Highlander. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Suspension

Estimated Time

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always wear safety glasses when working under the vehicle.
•Ensure vehicle is securely lifted and supported before working underneath.

Symptoms

•Vehicle shakes or vibrates during acceleration
•Noticeable vibrations through the steering wheel or seat
•Increased noise from the engine or drivetrain
•Diminished acceleration performance
•Potential check engine light illuminated

Diagnostic Steps

1
Inspect tires for balancing issues or uneven wear.
2
Check for loose or damaged suspension components, including control arms and bushings.
3
Perform a visual inspection of the driveshaft and CV joints for damage or wear.
4
Scan the vehicle's onboard computer for any error codes using an OBD-II scanner.
5
Check engine and transmission mounts for signs of wear or damage.
6
Test the wheel alignment and balance.

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

•Hydraulic jack and jack stands
•OBD-II scanner
•Tire pressure gauge
•Pry bar
•Socket set
•Torque wrench

Parts Required

•Tires (if damaged)
•Suspension components (control arms, bushings)
•Driveshaft or CV joints (if damaged)
•Engine or transmission mounts (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect tires for balancing issues or uneven wear.
2
Check for loose or damaged suspension components, including control arms and bushings.
3
Perform a visual inspection of the driveshaft and CV joints for damage or wear.
4
Scan the vehicle's onboard computer for any error codes using an OBD-II scanner.
5
Check engine and transmission mounts for signs of wear or damage.
6
Test the wheel alignment and balance.

Solution

1. Preparation

Gather all necessary tools and parts.
Park the vehicle on a flat surface and engage the parking brake.
Disconnect the battery if working on any electrical components.

2. Inspect and Balance Tires

Sub-steps:
1. Remove the wheel covers if equipped.
2. Check tire pressure and inflate to the recommended PSI.
3. Inspect for any visible damage or uneven wear.
4. Take the vehicle to a tire shop for balancing if necessary.

3. Check Suspension Components

Sub-steps:
1. Lift the vehicle using a hydraulic jack and secure it with jack stands.
2. Inspect control arms, bushings, and sway bar links for play or damage.
3. Replace any worn components with OEM or high-quality aftermarket parts.
4. Reassemble and lower the vehicle.

4. Inspect Driveshaft and CV Joints

Sub-steps:
1. Raise the vehicle and secure it.
2. Visually inspect the driveshaft for cracks or bends.
3. Check CV joints for torn boots or excessive play.
4. Replace damaged driveshaft or CV joints as necessary.

5. Check Engine and Transmission Mounts

Sub-steps:
1. Visually inspect mounts for cracks or excessive wear.
2. Use a pry bar to check for movement.
3. Replace mounts if they show signs of failure.

6. Wheel Alignment and Balance

Sub-steps:
1. After completing repairs, take the vehicle to a professional alignment shop.
2. Ensure that the alignment is within factory specifications.

Tools Required:

Hydraulic jack and jack stands
OBD-II scanner
Tire pressure gauge
Pry bar
Socket set
Torque wrench

Parts Required:

Tires (if damaged)
Suspension components (control arms, bushings)
Driveshaft or CV joints (if damaged)
Engine or transmission mounts (if damaged)

Estimated Repair Time: 3-5 hours

Safety Warnings:

Always wear safety glasses when working under the vehicle.
Ensure vehicle is securely lifted and supported before working underneath.