how to fix power mirror issues in my Toyota Highlander Third Generation (2014-2019)

Toyota Highlander Third Generation (2014-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

523 words

Problem Statement

Learn how to diagnose and fix power mirror issues in Toyota Highlander (2014-2019). 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 negative battery terminal before working on electrical systems to prevent shock.

Symptoms

•Power mirrors do not move when controls are activated
•Mirror adjustment switch feels loose or unresponsive
•One or both mirrors are stuck in a fixed position
•Indicators or lights on the mirror control switch are not functioning
•No sound or feedback when attempting to adjust mirrors

Diagnostic Steps

1
Inspect the power mirror control switch for physical damage or debris.
2
Use an OBD-II scanner to check for any electrical fault codes related to the mirror system.
3
Test the power mirror fuse in the fuse box for continuity.
4
Check wiring and connectors leading to the mirrors for signs of wear or damage.
5
Use a multimeter to measure voltage at the mirror motor connectors when controls are 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

•Screwdriver set
•Multimeter
•OBD-II scanner
•Fuse puller

Parts Required

•Replacement mirror motor (if necessary)
•Replacement fuse (if blown)

Related Faults

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Diagnostic Steps

1
Inspect the power mirror control switch for physical damage or debris.
2
Use an OBD-II scanner to check for any electrical fault codes related to the mirror system.
3
Test the power mirror fuse in the fuse box for continuity.
4
Check wiring and connectors leading to the mirrors for signs of wear or damage.
5
Use a multimeter to measure voltage at the mirror motor connectors when controls are activated.

Solution

1. Preparation

Tools Required: Screwdriver set, multimeter, OBD-II scanner, fuse puller
Disconnect the negative battery terminal to avoid electrical shock.

2. Inspect and Clean the Control Switch

Remove the trim panel surrounding the mirror control switch using a screwdriver.
Disconnect the switch from the wiring harness.
Inspect the switch for dirt or corrosion. Clean the contacts with electrical contact cleaner.
Reconnect the switch and replace the trim panel.

3. Check and Replace the Fuse

Locate the fuse box using the vehicle’s manual.
Identify the fuse associated with the power mirror system.
Use a fuse puller to remove the fuse and inspect it for continuity.
If the fuse is blown, replace it with a fuse of the same amperage.

4. Test and Repair Wiring

Visually inspect the wiring harness leading to the power mirrors for any signs of fraying or damage.
If damage is found, repair the wiring using heat-shrink tubing or electrical tape.
Reconnect any loose connectors and ensure they are secure.

5. Replace the Mirror Motor (if necessary)

If the mirrors still do not respond, you may need to replace the mirror motor.
Remove the mirror assembly from the vehicle by unscrewing the mounting screws.
Disconnect the wiring harness from the mirror motor.
Install the new mirror motor and reconnect the wiring.
Reattach the mirror assembly and secure it with screws.