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How can I resolve a malfunctioning windshield wiper system in my 2021 Toyota Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/How can I resolve a malfunctioning windshield wiper system in my 2021 Toyota Highlander?

How can I resolve a malfunctioning windshield wiper system in my 2021 Toyota Highlander?

Toyota Highlander Fourth Generation (2020-present)

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

Problem Statement

Learn how to diagnose and repair a malfunctioning windshield wiper system in your 2021 Toyota Highlander with step-by-step instructions and required tools.

Affected Component
windshield wiper system
Estimated Time
2-4 hours

Symptoms

  • •Wipers not functioning
  • •Wipers stuck in one position
  • •Intermittent operation
  • •No sound from the motor

Diagnostic Steps

  1. 1
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  4. 4
  5. 5
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  10. 10

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
  • •Fuse puller or pliers
  • •Wiring diagram
  • •Socket set
  • •Jumper wires
  • •Screwdriver set
  • •Torque wrench

Additional Information

Affected Component
windshield wiper system
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
7 items

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Back to Generation

Resolving a Malfunctioning Windshield Wiper System in a 2021 Toyota Highlander

Step 1: Visual Inspection
  1. Check Wiper Blades: Ensure that the blades are not damaged, frozen, or stuck.
  2. Inspect Wiper Arms: Confirm that the wiper arms are not bent or obstructed.
  3. Fluid Level: Check the windshield washer fluid reservoir to ensure it is filled.
  4. Fuses: Locate and check the wiper motor fuse in the fuse box (refer to the owner’s manual for the location and fuse specifications).
Step 2: Electrical Testing

  1. Tools Required:

    • Multimeter
    • Fuse puller or pliers
    • Wiring diagram (for reference)

  2. Test the Fuse:

    • Remove the wiper fuse and check it for continuity using a multimeter. If the fuse is blown, replace it and test the wiper system again.

  3. Check Power to the Wiper Motor:

    • Disconnect the wiper motor connector.
    • Set the multimeter to DC voltage.
    • Turn on the ignition (do not start the engine) and activate the wiper switch.
    • Probe the connector terminals to check for voltage. You should see around 12V at the motor connector when the switch is activated.
Step 3: Wiper Motor Functionality

  1. Tools Required:

    • Socket set (to remove the wiper motor)
    • Multimeter
    • Jumper wires (for testing)

  2. Test the Wiper Motor:

    • If there is voltage at the motor connector but the motor does not operate, the motor may be faulty.
    • To confirm, apply 12V directly to the motor using jumper wires. If the motor runs, it indicates a problem in the wiring or switch.
Step 4: Inspect the Wiper Switch

  1. Tools Required:

    • Multimeter
    • Screwdriver set (to remove panels)

  2. Access the Wiper Switch:

    • Remove the necessary panels to access the wiper switch on the steering column.
    • Use the multimeter to test for continuity on the switch terminals when activated. If there is no continuity, replace the wiper switch.
Repair Instructions
Repairing or Replacing the Wiper Motor

  1. Tools Required:

    • Socket set
    • Torque wrench
    • New wiper motor (if needed)

  2. Remove the Wiper Arms:

    • Lift the wiper arms away from the windshield.
    • Remove the nuts securing the wiper arms using a socket wrench.

  3. Remove the Cowling:

    • Detach any clips or screws securing the cowling cover beneath the wipers.
    • Carefully remove the cowling to access the wiper motor.

  4. Disconnect the Wiper Motor:

    • Disconnect the motor's electrical connector.
    • Remove the mounting bolts for the wiper motor using a socket set.
    • Carefully remove the motor from its housing.

  5. Install the New Wiper Motor:

    • Position the new motor and secure it using the mounting bolts.
    • Reconnect the electrical connector.

  6. Reinstall the Cowling and Wiper Arms:

    • Reinstall the cowling and secure it with clips or screws.
    • Reattach the wiper arms and secure them with the nuts, ensuring they are positioned correctly.
Repairing or Replacing the Wiper Switch

  1. Tools Required:

    • Screwdriver set
    • New wiper switch (if needed)

  2. Access and Remove the Switch:

    • Remove the panels to access the wiper switch.
    • Disconnect the electrical connector from the switch.
    • Remove the screws or clips holding the switch in place.

  3. Install the New Wiper Switch:

    • Position the new switch and secure it with screws or clips.
    • Reconnect the electrical connector.

  4. Reassemble Panels:

    • Reinstall any panels removed during access.
Final Testing

After performing repairs, turn on the ignition and activate the wiper system. Verify that the wipers operate correctly in all modes: low, high, and intermittent.

If problems persist after these repairs, further electrical diagnostics may be needed, potentially involving wiring harness checks or a visit to a professional technician.