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What problems can occur with the electronic parking brake in the 2020 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What problems can occur with the electronic parking brake in the 2020 Toyota Highlander?

What problems can occur with the electronic parking brake in the 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
745 words

Problem Statement

Explore common issues with the electronic parking brake system in the 2020 Toyota Highlander, including symptoms, diagnostic steps, and repair instructions.

Affected Component
Electronic Parking Brake (EPB)

Symptoms

  • •Warning light illuminated on the dashboard indicating a fault in the EPB system.
  • •The brake does not activate when the switch is pressed.
  • •The vehicle rolls when parked.
  • •Grinding or clicking noises heard when the EPB is engaged or disengaged.
  • •Brake pads excessively hot after use.
  • •Vehicle feels sluggish when driving.
  • •EPB does not function correctly after brake service.

Diagnostic Steps

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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
  • •Basic hand tools (screwdrivers, wrenches)
  • •Multimeter
  • •Wiring diagram for the EPB system
  • •Stethoscope or listening device
  • •Torque wrench
  • •Infrared thermometer

Additional Information

Affected Component
Electronic Parking Brake (EPB)
Difficulty
medium
Severity
medium
Tools Required
7 items

Related Faults

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Problems with the Electronic Parking Brake in the 2020 Toyota Highlander

The electronic parking brake (EPB) system in the 2020 Toyota Highlander is designed to provide convenience and safety. However, like any electronic system, it can experience issues. Here are some common problems that may occur, along with symptoms, diagnostic steps, tools required, and repair instructions.

Common Problems
  1. EPB Warning Light on Dashboard
  2. EPB Not Engaging/Disengaging
  3. Unusual Noises When Operating EPB
  4. Brake Drag or Overheating
  5. Failed Calibration After Brake Pad Replacement
1. EPB Warning Light on Dashboard
Tools Required
  • OBD-II scanner
  • Basic hand tools (screwdrivers, wrenches)
Repair Instructions
  1. Retrieve Codes: Connect the OBD-II scanner and note any codes related to the EPB.
  2. Interpret Codes: Refer to the service manual for code definitions.
  3. Address Issues: Based on the codes, inspect components (e.g., EPB switch, actuators) for faults.
  4. Clear Codes: After repairs, clear the fault codes and test the system.
2. EPB Not Engaging/Disengaging
Tools Required
  • Multimeter
  • Wiring diagram for the EPB system
Repair Instructions
  1. Inspect and Repair Wiring: Repair any damaged wires or connectors.
  2. Check Switch Functionality: If the switch is faulty, replace it.
  3. Test Actuator: If voltage is present but the actuator does not respond, replace the actuator.
  4. Re-test the EPB: Ensure it engages and disengages correctly.
3. Unusual Noises When Operating EPB
Tools Required
  • Basic hand tools
  • Stethoscope or listening device
Repair Instructions
  1. Inspect and Clean: Remove the rear wheels and inspect the brake pads, rotors, and calipers for wear or debris.
  2. Replace Worn Parts: If any parts are worn, replace them as necessary.
  3. Test the EPB: After repairs, test the EPB to ensure the noise is gone.
4. Brake Drag or Overheating
Tools Required
  • Torque wrench
  • Basic hand tools
  • Infrared thermometer
Repair Instructions
  1. Inspect Actuator: Ensure that the actuator is not stuck in the engaged position.
  2. Adjust or Replace: If the actuator is faulty or binding, adjust or replace it as necessary.
  3. Check Brake Pads: Replace any unevenly worn brake pads.
  4. Re-test: After repairs, monitor for any signs of brake drag.
5. Failed Calibration After Brake Pad Replacement
Tools Required
  • OBD-II scanner with EPB calibration functionality
  • Basic hand tools
Repair Instructions
  1. Perform Calibration: Use an OBD-II scanner to perform EPB calibration if necessary.
  2. Test Operation: After calibration, test the EPB to ensure it operates as expected.
  3. Check for Issues: If the problem persists, recheck the installation of brake components.
Conclusion

The electronic parking brake system in the 2020 Toyota Highlander can present a variety of issues, but with systematic diagnostic steps and proper tools, most problems can be identified and resolved effectively. Always refer to the manufacturer’s service manual for specific guidelines and specifications related to repairs.