how to fix the mirror adjustment not working on my Toyota Corolla E170 (2013-2019)

Toyota Corolla E170 (2013-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

580 words

Problem Statement

Learn how to diagnose and fix mirror adjustment issues in Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Ensure the vehicle is in park and on a flat surface when performing repairs.

Symptoms

•Side mirror adjustment switch does not respond
•Mirrors remain in fixed positions
•No sound or movement from the mirror motors
•Driver's side or passenger's side mirror may be non-adjustable
•Possible illumination of the adjustment switch indicator light

Diagnostic Steps

1
Inspect the mirror adjustment switch for physical damage or wear.
2
Use an OBD-II scanner to check for any related error codes.
3
Test the mirror adjustment switch for continuity using a multimeter.
4
Check the fuses related to the power window and mirror systems.
5
Inspect the wiring harnesses connected to the mirrors for damage or disconnection.
6
Verify the operation of the mirror motors by applying direct power to them.

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 (Phillips and flathead)
•Trim removal tool

Parts Required

•Replacement mirror adjustment switch (if faulty)
•Fuses (if blown)
•Mirror motor (if defective)

Related Faults

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Diagnostic Steps

1
Inspect the mirror adjustment switch for physical damage or wear.
2
Use an OBD-II scanner to check for any related error codes.
3
Test the mirror adjustment switch for continuity using a multimeter.
4
Check the fuses related to the power window and mirror systems.
5
Inspect the wiring harnesses connected to the mirrors for damage or disconnection.
6
Verify the operation of the mirror motors by applying direct power to them.

Solution

1. Preparation

Gather tools and parts required for the repair.
Disconnect the vehicle's battery to ensure safety during electrical work.

Tools Required:

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

2. Inspect and Replace the Switch

Remove the door panel:
- Use a trim removal tool to gently pry off the door panel clips.
- Unscrew any visible screws holding the panel in place.
- Carefully lift the panel away from the door.
Access the mirror adjustment switch:
- Locate the switch on the door panel.
- Disconnect the wiring harness from the switch.
Test the switch:
- Use a multimeter to check for continuity across the switch terminals.
- If the switch is faulty, replace it with a new one.
Reconnect the new switch:
- Connect the wiring harness back to the switch.
- Reassemble the door panel by reversing the removal steps.

3. Check and Replace Fuses

Locate the fuse box:
- Refer to the owner’s manual for the exact location of the fuse box.
Inspect the relevant fuses:
- Identify the fuse for the mirror adjustment and check if it is blown.
- If blown, replace it with a fuse of the same amperage.

4. Inspect Wiring and Motors

Examine the wiring harness:
- Check for any signs of fraying or disconnection in the harness leading to the mirrors.
- Repair any damaged wiring as necessary.
Test the mirror motors:
- Connect the mirrors directly to the battery to see if they respond.
- If the motors do not function, replace them.