What are the common issues with the electronic parking brake in the 2021 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

563 words

Problem Statement

Explore common issues, symptoms, diagnostic steps, and repair instructions for the electronic parking brake in the 2021 Toyota Highlander.

Affected Component

Electronic Parking Brake

Estimated Time

2-4 hours

Symptoms

•Warning Lights
•Inability to Engage/Disengage
•Unusual Noises
•Poor Brake Performance
•EPB Malfunction Message

Diagnostic Steps

1
Perform a Visual Inspection
2
Check the Brake Fluid Level
3
Scan for Diagnostic Trouble Codes (DTCs)
4
Test the EPB Switch
5
Inspect the EPB Motor and Mechanism

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
•Multimeter
•Basic hand tools (screwdrivers, wrenches, pliers)
•Torque wrench
•Brake cleaner
•Replacement parts (if necessary)

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Solution

Common Issues with the Electronic Parking Brake in the 2021 Toyota Highlander

The electronic parking brake (EPB) in the 2021 Toyota Highlander has been known to exhibit certain issues. Below are some common symptoms, diagnostic steps, tools required, and general repair instructions.

Common Symptoms

Warning Lights: The dashboard may display a warning light indicating a malfunction in the parking brake system.
Inability to Engage/Disengage: The parking brake may not engage or disengage correctly, either staying on or not holding the vehicle in place.
Unusual Noises: Grinding, clicking, or whirring sounds may be heard when engaging or disengaging the parking brake.
Poor Brake Performance: The vehicle may roll when parked, indicating the parking brake is not holding effectively.
EPB Malfunction Message: The vehicle may display a message on the multi-information display indicating an EPB issue.

Tools Required

OBD-II scanner
Multimeter
Basic hand tools (screwdrivers, wrenches, pliers)
Torque wrench
Brake cleaner
Replacement parts (if necessary)

Repair Instructions

Repairing the Electronic Parking Brake

Resetting the EPB System:
- If DTCs are present, clear them using the OBD-II scanner.
- Perform an EPB calibration procedure if the system allows it (refer to the vehicle service manual for the calibration steps).
Replacing the EPB Switch:
- Disconnect the negative battery terminal.
- Remove the center console trim to access the EPB switch.
- Disconnect the wiring harness from the EPB switch.
- Install the new EPB switch and reconnect the wiring harness.
- Reassemble the center console and reconnect the battery.
Replacing the EPB Motor:
- Lift the vehicle safely and remove the rear wheel to access the EPB motor.
- Disconnect the wiring harness and unbolt the motor from the brake assembly.
- Install the new motor and torque to the manufacturer's specifications.
- Reconnect the wiring harness and reinstall the wheel.
Checking Brake Adjustment:
- After repairs, check the brake adjustment.
- Engage the parking brake several times to ensure it is functioning correctly.
- Test drive the vehicle to confirm the EPB engages and disengages properly.

Final Steps

After completing repairs, always perform a final inspection and test the electronic parking brake system to ensure everything is functioning correctly. If issues persist, further diagnosis may be necessary, possibly requiring specialized equipment or professional intervention.