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How do I fix a malfunctioning windshield wiper system in my 2020 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How do I fix a malfunctioning windshield wiper system in my 2020 Toyota Highlander?

How do I fix a malfunctioning windshield wiper system in my 2020 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-3 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
648 words

Problem Statement

Step-by-step guide to diagnose and repair the malfunctioning windshield wiper system in a 2020 Toyota Highlander.

Affected Component
windshield wiper system
Estimated Time
2-3 hours

Symptoms

  • •Wipers Not Working
  • •Intermittent Wipers Malfunction
  • •Wipers Stuck in One Position
  • •Wipers Move Slowly

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

  • •Multimeter
  • •Screwdrivers (Phillips and flat-head)
  • •Pliers
  • •Wrench set
  • •Replacement fuses (if needed)
  • •Replacement wiper relay (if needed)
  • •Replacement wiper motor (if needed)
  • •Torque wrench (for reassembly)

Additional Information

Affected Component
windshield wiper system
Estimated Time
2-3 hours
Difficulty
medium
Severity
medium
Tools Required
8 items

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Back to Generation
Fixing a Malfunctioning Windshield Wiper System in a 2020 Toyota Highlander
Tools Required
  • Multimeter
  • Screwdrivers (Phillips and flat-head)
  • Pliers
  • Wrench set
  • Replacement fuses (if needed)
  • Replacement wiper relay (if needed)
  • Replacement wiper motor (if needed)
  • Torque wrench (for reassembly)

Repair Instructions

Step 1: Verify Wiper Blades
  • Inspect blades for tears, cracks, or wear. Replace if necessary.
  • Replacement: Pull the wiper arm away from the windshield, press the release tab on the blade, and slide it off. Attach the new blade and ensure it clicks into place.
Step 2: Check and Replace the Wiper Fuse
  1. Locate Fuse Box: Refer to the owner’s manual for the exact location.
  2. Remove the Fuse: Use a fuse puller or pliers to gently remove the wiper fuse.
  3. Inspect the Fuse: If it's blown (the metal strip inside is broken), replace it with a fuse of the same amperage.
  4. Test Wipers Again: Turn on the wipers to see if they function.
Step 3: Test and Replace the Wiper Relay
  1. Locate the Relay: In the fuse box, find the wiper relay.
  2. Remove the Relay: Pull straight out from the socket.
  3. Test the Relay: Use a multimeter to check for continuity.
  4. Replace if Faulty: Insert a new relay if the original is defective.
Step 4: Inspect Wiring and Connections
  • Examine the wiring connected to the wiper motor and the switches for any signs of damage or corrosion. Repair any damaged wires using solder and electrical tape, or replace the entire harness if necessary.
Step 5: Test the Wiper Motor
  1. Access the Wiper Motor:
    • Remove the wiper arms by loosening the nuts with a wrench.
    • Remove the plastic cowl cover (if applicable) by unscrewing any screws or pulling clips.
  2. Disconnect the Motor: Unplug the electrical connector from the wiper motor.
  3. Test the Motor: Using jumper wires, connect the motor directly to the battery to see if it operates.
  4. Replace if Necessary: If the motor does not work, replace it:
    • Unscrew the motor from its mount, remove it, and install the new motor by reversing the steps.
Step 6: Reassemble and Test
  1. Reattach all components: Replace the cowl cover, wiper arms, and any screws removed.
  2. Test Wipers: Ensure they operate correctly in all modes.

Conclusion

By following these detailed steps, you should be able to diagnose and repair any malfunctioning aspects of the windshield wiper system on your 2020 Toyota Highlander. If issues persist after these repairs, consider consulting a professional technician.