what to do if my Toyota Corolla E170 (2013-2019) won’t unlock with the remote

Toyota Corolla E170 (2013-2019)

Error Codes

15-30 minutes

Time

easy

Difficulty

medium

Severity

3 min read

440 words

Problem Statement

Learn how to troubleshoot and fix your Toyota Corolla E170 key fob not unlocking the vehicle. Step-by-step guide for battery replacement and testing.

Affected Component

Electrical

Estimated Time

15-30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Key fob does not respond when buttons are pressed
•Vehicle does not unlock using the remote
•Check engine light may illuminate if there are underlying issues
•Manual unlocking with the key still works
•Key fob LED indicator does not light up when buttons are pressed

Diagnostic Steps

1
Check the battery in the key fob for corrosion or damage.
2
Replace the battery in the key fob and test the remote functionality.
3
Inspect the key fob for any physical damage or water exposure.
4
Verify the car's receiver is functioning by attempting to unlock the car with another key fob (if available).
5
Use an OBD-II scanner to check for error codes related to the vehicle's keyless entry system.

Solution

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
•New battery (CR2032)

Parts Required

•Key fob battery (CR2032)

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Diagnostic Steps

1
Check the battery in the key fob for corrosion or damage.
2
Replace the battery in the key fob and test the remote functionality.
3
Inspect the key fob for any physical damage or water exposure.
4
Verify the car's receiver is functioning by attempting to unlock the car with another key fob (if available).
5
Use an OBD-II scanner to check for error codes related to the vehicle's keyless entry system.

Solution

1. Preparation

Gather the necessary tools: small flathead screwdriver, new battery (usually CR2032), and a small container to keep screws and components organized.
Ensure the vehicle is in a secure area and turned off.

2. Open the Key Fob

Use the small flathead screwdriver to gently pry open the key fob along the seam.
Carefully separate the two halves without damaging the clips.

3. Replace the Battery

Remove the old battery by noting its orientation (positive side facing up).
Insert the new battery (CR2032) in the same orientation.

4. Reassemble the Key Fob

Align the two halves of the key fob and press them together until they click into place.
Ensure that there are no gaps between the halves.

5. Test the Key Fob

Stand close to the vehicle and press the unlock button on the key fob.
Observe if the vehicle unlocks successfully.