how to troubleshoot power windows not working on Toyota Highlander Third Generation (2014-2019)

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

578 words

Problem Statement

Learn how to troubleshoot and fix power windows not working in Toyota Highlander (2014-2019). Step-by-step guide with diagnostic and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool down before inspecting components.

Symptoms

•All power windows are non-operational
•Power window switches feel unresponsive or stuck
•Window lock switch may be illuminated
•No sound when pressing window switches
•Intermittent operation of windows prior to failure

Diagnostic Steps

1
Inspect the power window fuse for continuity using a multimeter.
2
Check the power window relay operation by swapping it with a similar relay in the fuse box.
3
Use an OBD-II scanner to check for any relevant trouble codes related to the power window system.
4
Verify the functionality of the window switches by testing each switch with a multimeter.
5
Inspect the wiring harness and connectors for any signs of damage or corrosion.
6
Test the power at the window motor with a multimeter when the switch is activated.

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
•Socket set
•Screwdrivers (flathead and Phillips)
•Trim removal tool

Parts Required

•Power window fuse (if blown)
•Power window relay (if faulty)
•Window switch (if defective)
•Window motor (if defective)

Related Faults

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Diagnostic Steps

1
Inspect the power window fuse for continuity using a multimeter.
2
Check the power window relay operation by swapping it with a similar relay in the fuse box.
3
Use an OBD-II scanner to check for any relevant trouble codes related to the power window system.
4
Verify the functionality of the window switches by testing each switch with a multimeter.
5
Inspect the wiring harness and connectors for any signs of damage or corrosion.
6
Test the power at the window motor with a multimeter when the switch is activated.

Solution

1. Preparation

Gather tools and parts. Disconnect the vehicle's battery to ensure safety.
Tools Required:
- Multimeter
- Socket set
- Screwdrivers (flathead and Phillips)
- Trim removal tool

2. Inspect and Replace the Fuse

Locate the fuse box under the dashboard or engine compartment.
Remove the cover and identify the power window fuse based on the diagram.
Use a multimeter to check for continuity. If the fuse is blown, replace it with a fuse of the same amperage.

3. Test and Replace the Relay

Find the power window relay in the fuse box.
Swap the relay with a similar functioning relay to test operation.
If the windows operate with the swapped relay, replace the faulty relay with a new one.

4. Check the Window Switches

Remove the door panel using a trim removal tool and screwdriver.
Disconnect the window switch connector and use a multimeter to check for voltage when the switch is pressed.
If no voltage is detected, replace the switch with a new one.

5. Inspect Wiring and Connectors

Visually inspect the wiring harness to each window motor for damage.
Clean and reseat any connectors that appear corroded or loose.
Repair any damaged wires as necessary.

6. Test Window Motor

If all previous components are functioning, test the window motor.
Connect the multimeter to the motor terminals and activate the switch.
If the motor does not receive voltage or does not operate, replace the window motor.