how to replace the battery in my key fob for Toyota Corolla E170 (2013-2019)

Toyota Corolla E170 (2013-2019)

Error Codes

15-30 minutes

Time

easy

Difficulty

low

Severity

3 min read

510 words

Problem Statement

Learn how to replace the key fob battery for your 2013-2019 Toyota Corolla E170. Step-by-step guide with tools required and safety tips.

Affected Component

Electrical

Estimated Time

15-30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure that you are working in a clean area to avoid losing small parts.
•Ensure you are working in a well-lit area to avoid losing small components.
•Handle the key fob and battery with care to prevent damage.

Symptoms

•Key fob not responding to button presses
•Difficulty unlocking or locking the doors remotely
•Engine start button not recognizing the key fob
•Warning light on the dashboard indicating a key fob issue
•Reduced range of key fob functionality

Diagnostic Steps

1
Verify that the key fob is the only issue by testing with a spare key fob if available.
2
Inspect the key fob for any physical damage or wear.
3
Attempt to unlock the vehicle manually using the physical key blade.
4
Check the vehicle’s battery; ensure the vehicle battery is charged and functioning.
5
Confirm that the issue persists after replacing the key fob battery.

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

•Flathead screwdriver
•Small Phillips screwdriver
•Key fob opening tool

Parts Required

•CR2032 battery

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Diagnostic Steps

1
Verify that the key fob is the only issue by testing with a spare key fob if available.
2
Inspect the key fob for any physical damage or wear.
3
Attempt to unlock the vehicle manually using the physical key blade.
4
Check the vehicle’s battery; ensure the vehicle battery is charged and functioning.
5
Confirm that the issue persists after replacing the key fob battery.

Solution

1. Preparation

Gather necessary tools and components.
Tools Required: Flathead screwdriver, small Phillips screwdriver, or key fob opening tool.
Safety Warnings: Ensure that you are working in a clean area to avoid losing small parts.

2. Open the Key Fob

Locate the small slot on the seam of the key fob.
Insert the flathead screwdriver or key fob opening tool into the slot and gently twist to separate the two halves of the fob.
Take care not to damage the plastic casing.

3. Remove the Old Battery

Once the key fob is open, locate the battery compartment.
Note the orientation of the battery (positive and negative sides).
Carefully remove the old battery using your fingers or the screwdriver if necessary.

4. Install the New Battery

Take the new battery (CR2032) and place it into the compartment, ensuring the correct orientation (positive side facing up).
Press down gently until the battery is seated securely.

5. Reassemble the Key Fob

Align the two halves of the key fob back together.
Press firmly around the edges to snap the fob closed, making sure it is sealed completely.

6. Test the Key Fob

Stand near the vehicle and press the lock/unlock buttons to ensure the key fob is functioning correctly.
If the vehicle responds as expected, the replacement is successful.