FAULTBASE
Error CodesASKCars
© 2026 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
How can I diagnose and fix a persistent ABS warning light in my Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How can I diagnose and fix a persistent ABS warning light in my Highlander?

How can I diagnose and fix a persistent ABS warning light in my Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
780 words

Problem Statement

Learn how to diagnose and fix a persistent ABS warning light in your 2020-present Toyota Highlander with step-by-step instructions.

Affected Component
ABS system
Estimated Time
2-4 hours

Symptoms

  • •ABS Warning Light On
  • •Brake Performance Issues
  • •Traction Control Light
  • •Noise from ABS Module

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8

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
  • •Digital Caliper
  • •Socket set
  • •Torque wrench
  • •Brake cleaner
  • •New ABS sensor
  • •Brake fluid
  • •Brake bleeder kit
  • •Torx or socket set
  • •New ABS module

Additional Information

Affected Component
ABS system
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
11 items

Related Faults

Loading...

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation
Diagnosing and Fixing a Persistent ABS Warning Light in a 2020-present Toyota Highlander (XU70)
Repair Instructions

  1. Replacing Faulty ABS Sensor

    • Tools Required: Socket set, torque wrench, brake cleaner, new ABS sensor.
    • Raise the vehicle and remove the wheel corresponding to the faulty sensor.
    • Disconnect the electrical connector from the ABS sensor.
    • Remove the sensor from its mounting location.
    • Install the new sensor in reverse order, ensuring it is properly seated and connected.
    • Reconnect the wheel and lower the vehicle.

  2. Repairing Wiring Issues

    • If wiring is damaged, cut out the damaged section and splice in new wire using solder and heat shrink tubing.
    • Ensure proper insulation and reattach connectors securely.

  3. Flushing Brake System

    • Tools Required: Brake fluid, brake bleeder kit.
    • Use a brake bleeder kit to flush old brake fluid and replace with new, ensuring no air enters the system.
    • Bleed all four corners until clean fluid runs out.

  4. Replacing the ABS Module (if necessary)

    • Tools Required: Torx or socket set, new ABS module.
    • Disconnect the battery and remove any under-hood covers.
    • Disconnect the wiring harness from the ABS module.
    • Remove the bolts securing the module and take it out.
    • Install the new module, connect the wiring harness, and secure it with bolts.
    • Reconnect the battery.

Final Steps

  1. Clearing Codes

    • After repairs, use the OBD-II scanner to clear any stored ABS trouble codes.
    • Start the vehicle and check if the ABS warning light remains off.

  2. Test Drive

    • Conduct a test drive to ensure that the ABS is functioning properly and that the warning light does not reappear.

  3. Final Inspection

    • Conduct a final inspection of the ABS system using the OBD-II scanner to confirm that no new codes have appeared.

By following these steps methodically, you should be able to diagnose and fix the persistent ABS warning light in your Toyota Highlander.