my Toyota Corolla E170 (2013-2019) key fob isn't working how to fix it

Toyota Corolla E170 (2013-2019)

Error Codes

30 minutes

Time

medium

Difficulty

high

Severity

3 min read

467 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix a non-functioning key fob for Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Be careful when using tools to avoid damaging the key fob casing.

Symptoms

•Key fob buttons do not respond
•Indicator light on the key fob does not illuminate
•Vehicle does not respond to key fob signals
•Unable to lock or unlock doors remotely
•Engine does not start when the key fob is present

Diagnostic Steps

1
Check the battery status of the key fob using a multimeter.
2
Inspect the key fob for physical damage or wear, especially around the buttons.
3
Replace the battery in the key fob and test functionality.
4
Verify that the vehicle’s keyless entry system is functioning properly by testing the manual key entry.
5
Reprogram the key fob if necessary, per the owner’s manual instructions.

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

•Small flathead screwdriver
•Multimeter

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Check the battery status of the key fob using a multimeter.
2
Inspect the key fob for physical damage or wear, especially around the buttons.
3
Replace the battery in the key fob and test functionality.
4
Verify that the vehicle’s keyless entry system is functioning properly by testing the manual key entry.
5
Reprogram the key fob if necessary, per the owner’s manual instructions.

Solution

1. Preparation

Gather necessary tools: a small flathead screwdriver, a new battery (CR2032 for most Toyota key fobs), and a multimeter.
Ensure the vehicle is parked and in a safe location.

2. Open the Key Fob

Using the small flathead screwdriver, gently pry open the key fob casing at the seam.
Take care to avoid damaging the plastic casing.

3. Replace the Battery

Remove the old battery from the key fob. Note the orientation of the battery for correct replacement.
Insert the new CR2032 battery, ensuring it is installed in the correct orientation (+ side facing up).

4. Close the Key Fob

Align the two halves of the key fob casing and press them together until they snap back into place.
Ensure that there are no gaps and the casing is securely closed.

5. Test the Key Fob

Stand near the vehicle and press the lock/unlock buttons to check for functionality.
Ensure the indicator light on the key fob illuminates when a button is pressed.

6. Reprogram the Key Fob (if necessary)

If the key fob does not work after battery replacement, refer to the owner’s manual for reprogramming instructions or consult a Toyota dealer.