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

518 words

Problem Statement

Learn how to troubleshoot and fix power windows not working on 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 battery before working on electrical systems to avoid short circuits.

Symptoms

•All power windows are unresponsive
•Window control switches do not illuminate when pressed
•No sound of window motors attempting to operate
•Driver's side master switch is unresponsive
•Fuses related to power windows are intact

Diagnostic Steps

1
Inspect the power window fuse in the fuse box for any damage or blown fuses.
2
Use an OBD-II scanner to check for any related fault codes that might indicate an electrical issue.
3
Test the power window switches for continuity using a multimeter.
4
Verify that the battery voltage is adequate and terminals are clean and secure.
5
Check the wiring harnesses for any visible damage or disconnection, especially around the door hinges.
6
Inspect the window motors by applying direct battery voltage to determine if they are operational.

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

•OBD-II scanner
•Multimeter
•Trim removal tool
•Standard socket set
•Jumper wires
•Fuse puller

Parts Required

•Replacement fuses
•Window switch (if faulty)
•Window motor (if faulty)

Related Faults

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Diagnostic Steps

1
Inspect the power window fuse in the fuse box for any damage or blown fuses.
2
Use an OBD-II scanner to check for any related fault codes that might indicate an electrical issue.
3
Test the power window switches for continuity using a multimeter.
4
Verify that the battery voltage is adequate and terminals are clean and secure.
5
Check the wiring harnesses for any visible damage or disconnection, especially around the door hinges.
6
Inspect the window motors by applying direct battery voltage to determine if they are operational.

Solution

1. Preparation

Gather necessary tools and materials.
Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Replace Blown Fuses

Locate the fuse box under the dashboard or hood.
Identify the power window fuse using the diagram on the fuse box cover.
Use a fuse puller to remove the fuse and inspect it for damage.
Replace with a new fuse of the same amperage if it is blown.

3. Repair or Replace Window Switches

Remove the trim panel around the window switch using a trim removal tool.
Disconnect the electrical connector from the switch.
Test the switch with a multimeter for continuity; replace if faulty.
If replacing, install the new switch by connecting the electrical connector and securing the trim panel.

4. Inspect and Repair Wiring

Remove the door panel to access the wiring harness.
Check for any frayed or damaged wires.
Use electrical tape or heat-shrink tubing to repair minor damage or replace sections of wiring if necessary.
Reassemble the door panel after repairs.

5. Test Window Motors

Disconnect the window motor from its connector.
Using jumper wires, connect the motor directly to the battery to see if it operates.
If the motor does not function, replace it with a new unit.
Reconnect wiring and test operation before reassembling the door panel.