my Toyota Highlander XU70 (2020-Present) windshield wipers won't turn on, what should I check?

Toyota Highlander XU70 (2020-Present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

551 words

Problem Statement

Learn how to diagnose and fix windshield wipers not working on Toyota Highlander XU70. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems
•Ensure the ignition is off to prevent accidental activation

Symptoms

•Windshield wipers do not activate when the control is engaged
•No sound or movement from the wiper motor
•Possible 'wiper' warning light on the dashboard
•Washer fluid may not spray if wipers are also disabled
•Intermittent wiper function may not operate as intended

Diagnostic Steps

1
Check the wiper switch for functionality using a multimeter
2
Inspect the wiper fuse for continuity; replace if blown
3
Use an OBD-II scanner to check for any relevant error codes
4
Directly test the wiper motor by applying voltage to the motor connectors
5
Inspect wiring harnesses and connectors for damage, corrosion, or loose connections
6
Test the wiper relay for proper operation

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
•OBD-II scanner
•Socket set
•Screwdriver set

Parts Required

•Wiper fuse (if blown)
•Wiper switch (if faulty)
•Wiper motor (if defective)

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Diagnostic Steps

1
Check the wiper switch for functionality using a multimeter
2
Inspect the wiper fuse for continuity; replace if blown
3
Use an OBD-II scanner to check for any relevant error codes
4
Directly test the wiper motor by applying voltage to the motor connectors
5
Inspect wiring harnesses and connectors for damage, corrosion, or loose connections
6
Test the wiper relay for proper operation

Solution

1. Preparation

Tools Required:
- Multimeter
- OBD-II scanner
- Socket set
- Screwdriver set
Safety Warnings:
- Disconnect the battery before working on electrical systems.
- Ensure the ignition is off to prevent accidental activation.

2. Replace Blown Fuse

Sub-steps:
1. Locate the fuse box; refer to the owner’s manual for the exact location.
2. Identify the wiper fuse using the diagram on the fuse box cover.
3. Remove the fuse using a fuse puller or pliers.
4. Inspect the fuse for a broken filament; replace with a fuse of the same amperage if necessary.

3. Repair or Replace the Wiper Switch

Sub-steps:
1. Remove the steering column cover using a screwdriver.
2. Disconnect the wiring harness from the wiper switch.
3. Test the switch with a multimeter to ensure it is functioning properly; replace if faulty.
4. Reconnect the wiring harness and reassemble the steering column cover.

4. Replace Wiper Motor (if necessary)

Sub-steps:
1. Disconnect the battery.
2. Remove the wiper arms by loosening the nuts with a socket set and lifting them off the splines.
3. Remove any plastic covers concealing the wiper motor.
4. Disconnect the electrical connector from the wiper motor.
5. Remove the mounting bolts securing the motor to the vehicle.
6. Install the new wiper motor by reversing the removal steps.