What are the common problems with the Toyota Highlander's electric parking brake?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

medium

Difficulty

medium

Severity

5 min read

872 words

Problem Statement

Explore common issues with the Toyota Highlander's electric parking brake, including symptoms, diagnostic steps, and repair instructions.

Affected Component

Electric Parking Brake (EPB)

Symptoms

•EPB warning light illuminated
•Parking brake not engaging/disengaging
•Grinding noise when engaging/disengaging
•EPB system failure message on dashboard
•Brake dragging or sticking

Diagnostic Steps

1
Check for DTCs using an OBD-II scanner
2
Inspect EPB switch for damage
3
Visual inspection of wiring harness and connectors
4
Check battery voltage
5
Inspect EPB control module
6
Test brake actuator
7
Visual inspection of brake components
8
Check power supply to EPB system

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, pliers)
•Floor Jack and Jack Stands
•Brake Cleaner
•Vehicle Service Manual (for wiring diagrams)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Solution

Common Problems with the Toyota Highlander's Electric Parking Brake (2020-present)

The electric parking brake (EPB) in the Toyota Highlander (Fourth Generation) can exhibit various issues. Below are some common problems associated with the EPB system, along with their symptoms, diagnostic steps, tools required, and repair instructions.

Common Problems

EPB Warning Light Illuminated
Parking Brake Not Engaging/Disengaging
Grinding Noise When Engaging/Disengaging
EPB System Failure Message on Dashboard
Brake Dragging or Sticking

Problem 1: EPB Warning Light Illuminated

Tools Required:

OBD-II Scanner
Multimeter
Basic Hand Tools (screwdrivers, pliers)

Repair Instructions:

Read DTCs: Connect the OBD-II scanner and retrieve any relevant codes. Note the codes for further troubleshooting.
Inspect Wiring: If codes indicate a wiring issue, inspect the wiring harness for damage. Repair or replace damaged wiring as needed.
Check EPB Switch Functionality: Use a multimeter to check the continuity of the EPB switch. Replace if defective.
Clear DTCs: After making repairs, clear the DTCs and test drive to see if the warning light reappears.

Problem 2: Parking Brake Not Engaging/Disengaging

Tools Required:

Multimeter
OBD-II Scanner
Vehicle Service Manual (for wiring diagrams)

Repair Instructions:

Battery Check: Use a multimeter to measure the battery voltage; it should be above 12.4V.
Module Inspection: Access the EPB control module, and check for loose connections. Repair as necessary.
Actuator Test: Disconnect the actuator and test it with a multimeter for resistance. If it’s out of spec, replace the actuator.
Reassemble and Test: Reconnect all components and test the EPB operation.

Problem 3: Grinding Noise When Engaging/Disengaging

Tools Required:

Floor Jack and Jack Stands
Basic Hand Tools
Brake Cleaner

Repair Instructions:

Raise Vehicle: Using a floor jack and jack stands, lift the rear of the vehicle.
Inspect Brake Assembly: Remove the rear wheels and inspect the brake pads, rotors, and calipers for wear. Replace any worn components.
Clean Components: Use brake cleaner to remove debris from the brake components.
Test EPB System: After reassembly, engage and disengage the EPB to check for noise.

Problem 4: EPB System Failure Message on Dashboard

Tools Required:

OBD-II Scanner
Multimeter
Wiring Diagrams

Repair Instructions:

Retrieve Codes: Use the OBD-II scanner to check for fault codes.
Power Check: Use a multimeter to check for power at the EPB control module. Repair any power issues.
Module Replacement: If all other components check out, the EPB control module may need to be replaced. Refer to the vehicle service manual for specific procedures.

Problem 5: Brake Dragging or Sticking

Tools Required:

Floor Jack and Jack Stands
Basic Hand Tools

Repair Instructions:

Lift Vehicle: Use a floor jack and jack stands to elevate the rear of the vehicle.
Brake Inspection: Remove the rear wheels and inspect brake pads and calipers for proper movement. Replace any damaged components.
Cable Inspection: Inspect the EPB cable for kinks or binding. Replace if damaged.
Reassemble and Test: After repairs, reassemble and test the EPB system functionality.

Conclusion

The electric parking brake system in the Toyota Highlander can present various issues, but with the right diagnostics and repair steps, most problems can be resolved effectively. Always consult the vehicle's service manual for specific details and specifications when performing repairs.