FAULTBASE
Error CodesASKCars
© 2026 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
How to troubleshoot the anti-lock braking system in a 2023 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How to troubleshoot the anti-lock braking system in a 2023 Toyota Highlander?

How to troubleshoot the anti-lock braking system in a 2023 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

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

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to troubleshoot and repair the Anti-Lock Braking System (ABS) in a 2023 Toyota Highlander with detailed symptoms, diagnostic steps, and tools required.

Affected Component
Anti-Lock Braking System (ABS)
Estimated Time
2-4 hours

Symptoms

  • •ABS Warning Light
  • •Brake Performance Issues
  • •Unusual Brake Feel
  • •Increased Stopping Distance

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11

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
  • •Brake fluid tester
  • •Basic hand tools (screwdrivers, wrenches, ratchet set)
  • •Jack and jack stands or a hydraulic lift
  • •Torque wrench
  • •Safety goggles and gloves

Additional Information

Affected Component
Anti-Lock Braking System (ABS)
Estimated Time
2-4 hours
Difficulty
medium
Severity
high
Tools Required
7 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
Troubleshooting the Anti-Lock Braking System (ABS) in a 2023 Toyota Highlander
Tools Required
  • OBD-II Scanner
  • Multimeter
  • Brake fluid tester
  • Basic hand tools (screwdrivers, wrenches, ratchet set)
  • Jack and jack stands or a hydraulic lift
  • Torque wrench
  • Safety goggles and gloves
Repair Instructions

Step 1: Clear DTCs

  1. Connect OBD-II Scanner:

    • Plug the OBD-II scanner into the vehicle’s port (usually located under the dashboard).

  2. Read DTCs:

    • Follow the scanner instructions to read and record any ABS codes.

  3. Clear Codes:

    • Clear the codes and take the vehicle for a test drive to see if the warning light returns.

Step 2: Replace Faulty Components

  1. Replace Wheel Speed Sensors (if defective):

    • Remove the wheel and brake caliper for access.
    • Disconnect the wiring harness from the sensor.
    • Remove the sensor and install a new one in reverse order.
    • Torque to manufacturer specifications.

  2. Repair or Replace Wiring (if damaged):

    • Identify the damaged section of wiring.
    • Use appropriate connectors or solder to repair. Ensure proper insulation to prevent moisture ingress.

  3. Replace ABS Module (if necessary):

    • Disconnect the battery.
    • Remove the ABS module by unbolting it from the mounting bracket.
    • Disconnect the wiring harness.
    • Install the new module and reconnect the wiring.
    • Reconnect the battery.

Step 3: Brake Fluid Change

  1. Flush Brake Fluid:
    • Use a brake bleeder kit or traditional method to flush old fluid from the system.
    • Replace with fresh DOT 3 or DOT 4 brake fluid, ensuring no air remains in the lines.

Step 4: Final Testing

  1. Recheck DTCs:

    • After repairs, use the OBD-II scanner again to ensure no new codes have appeared.

  2. Road Test:

    • Take the vehicle for a test drive, focusing on brake performance and ensuring the ABS warning light does not return.

  3. Monitor Performance:

    • Observe the vehicle during various braking situations (hard stops, slippery conditions) to ensure the ABS is functioning correctly.
Conclusion

If after following all these steps the ABS system is still not functioning properly, it may be necessary to consult with a specialized automotive technician or visit a dealership for further diagnosis. The ABS is a critical safety system, and professional evaluation may be warranted if issues persist.