why does my Toyota Highlander Third Generation (2014-2019) make a pulsating noise when braking?

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

503 words

Problem Statement

Learn how to diagnose and fix pulsating noise when braking in a Toyota Highlander (2014-2019). 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 brakes to cool before inspection or repairs.

Symptoms

•Pulsating noise when applying brakes
•Vibration felt through the brake pedal
•Increased stopping distance
•Brake warning light illuminated
•Uneven wear on brake pads or rotors

Diagnostic Steps

1
Inspect brake pads for wear and ensure they are not worn down to the backing material.
2
Check the brake rotors for warping or scoring using a runout gauge.
3
Examine the brake calipers for proper operation and ensure they are not sticking.
4
Inspect brake fluid level and quality; check for contamination.
5
Test drive the vehicle to replicate the noise and feel for vibrations.

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
•Torque wrench
•Jack and jack stands
•Brake lathe
•Micrometer or runout gauge

Parts Required

•Brake pads
•Brake rotors
•Brake fluid

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Diagnostic Steps

1
Inspect brake pads for wear and ensure they are not worn down to the backing material.
2
Check the brake rotors for warping or scoring using a runout gauge.
3
Examine the brake calipers for proper operation and ensure they are not sticking.
4
Inspect brake fluid level and quality; check for contamination.
5
Test drive the vehicle to replicate the noise and feel for vibrations.

Solution

1. Preparation

Gather tools and parts required for repair.
Ensure the vehicle is parked on a level surface and engage the parking brake.
Disconnect the battery to prevent electrical shorts.

2. Remove the Wheel

Loosen the lug nuts on the affected wheel using a socket wrench.
Raise the vehicle with a jack and secure it with jack stands.
Remove the wheel to access the brake components.

3. Inspect and Replace Brake Pads

Inspect: Remove the caliper bolts using a socket set and carefully lift the caliper off the rotor.
Check: Inspect the brake pads for uneven wear; replace if necessary.
Replace: If replacing, slide the new brake pads into the caliper bracket.

4. Inspect and Resurface/Replace Rotors

Inspect: Measure rotor thickness and check for warping using a micrometer or runout gauge.
Resurface: If within specifications, use a brake lathe to resurface the rotors.
Replace: If warped beyond specifications, remove the rotor and replace it with a new one.

5. Reassemble Components

Reattach the caliper over the new or resurfaced rotor.
Tighten caliper bolts to the manufacturer's specified torque (typically around 25-30 ft-lbs).
Reinstall the wheel and tighten the lug nuts in a crisscross pattern.

6. Final Checks

Reconnect the battery.
Check brake fluid levels and top up if necessary.
Lower the vehicle and perform a final test of the brakes by pressing the pedal before driving.