FAULTBASE
Error CodesASKCars
© 2026 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
What are the common causes of a malfunctioning windshield wiper system in a 2020 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What are the common causes of a malfunctioning windshield wiper system in a 2020 Toyota Highlander?

What are the common causes of a malfunctioning windshield wiper system in a 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

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

Problem Statement

Learn about the common causes, symptoms, and diagnostic steps for troubleshooting the windshield wiper system in a 2020 Toyota Highlander.

Affected Component
windshield wiper system

Symptoms

  • •Wipers do not operate
  • •Wipers move intermittently
  • •Wipers stuck in one position
  • •Wiper speed issues
  • •Noisy wipers
  • •Wiper blades do not clear water

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

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

  • •Flashlight
  • •Multimeter
  • •Fuse tester
  • •Wiring diagram
  • •Repair manual

Additional Information

Affected Component
windshield wiper system
Difficulty
medium
Severity
medium
Tools Required
5 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
Common Causes of a Malfunctioning Windshield Wiper System in a 2020 Toyota Highlander

The windshield wiper system in a 2020 Toyota Highlander can malfunction due to various reasons. Below are some common causes, symptoms, and diagnostic steps to address the issue.

Step 1: Visual Inspection
  • Tools Required: Flashlight
  • Actions:
    • Inspect wiper blades for wear or damage (cracks, tears).
    • Check the wiper arm for secure attachment to the motor shaft.
    • Look for any obstructions (debris, ice) that may impede wiper movement.

Step 2: Check Fuses

  • Tools Required: Multimeter or fuse tester
  • Actions:
    • Locate the fuse box (usually under the dashboard on the driver’s side).
    • Consult the owner’s manual for the specific fuse related to the wipers.
    • Use the multimeter or fuse tester to check if the fuse is blown.
    • If blown, replace with the same amperage fuse.

Step 3: Test Wiper Motor Operation

  • Tools Required: Multimeter, wiring diagram (from repair manual)
  • Actions:
    • Disconnect the wiper motor connector.
    • Use a multimeter to check if there’s power at the motor connector when the wiper switch is activated.
    • If there is power, but the motor does not operate, the motor may need replacement.
    • If there is no power, trace back to the wiper switch and wiring for faults.

Step 4: Inspect Wiper Switch

  • Tools Required: Multimeter, repair manual
  • Actions:
    • Remove the steering column cover to access the wiper switch.
    • Use the multimeter to test for continuity through the switch.
    • If there is no continuity when the switch is activated, replace the switch.

Step 5: Check Wiring and Connectors

  • Tools Required: Multimeter, wiring diagram
  • Actions:
    • Inspect the wiring harness for any signs of wear, corrosion, or disconnection.
    • Use the multimeter to check for continuity along the wires.
    • Repair or replace any damaged wiring or connectors as necessary.

Step 6: Test Wiper Relay

  • Tools Required: Multimeter, repair manual
  • Actions:
    • Locate the wiper relay in the fuse box or relay box.
    • Swap the relay with a similar relay in the box (if available) to test functionality.
    • If the wipers operate with the swapped relay, replace the faulty relay.
Repair Instructions

Replacing Wiper Blades

  1. Lift the wiper arm away from the windshield.
  2. Press the release tab on the wiper blade and slide it off the wiper arm.
  3. Align the new wiper blade with the arm and slide it into place until it clicks.
  4. Lower the wiper arm back onto the windshield.

Replacing Wiper Motor

  1. Disconnect the battery to avoid electrical shock.
  2. Remove the wiper arms by unscrewing the retaining nuts.
  3. Remove any covering panel to access the wiper motor.
  4. Disconnect the wiring harness from the wiper motor.
  5. Unbolt the wiper motor from its mount.
  6. Install the new wiper motor by reversing the procedure, ensuring it’s securely bolted and connected.

Replacing Wiper Switch

  1. Disconnect the battery.
  2. Remove the steering column cover.
  3. Unplug the wiper switch connector.
  4. Remove the screws holding the wiper switch in place.
  5. Install the new switch and reconnect the wiring.
  6. Reassemble the steering column cover and reconnect the battery.
Conclusion

By following these diagnostic steps and repair instructions, you can troubleshoot and resolve common issues with the windshield wiper system in a 2020 Toyota Highlander. Regular maintenance of wiper blades and timely inspection of electrical components can help prevent future malfunctions.