what to do if my Toyota Corolla E170 (2013-2019) key fob is not working

Toyota Corolla E170 (2013-2019)

Error Codes

30 minutes

Time

medium

Difficulty

medium

Severity

3 min read

469 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Avoid using excessive force when opening the key fob to prevent damage.

Symptoms

•Key fob buttons are unresponsive
•Vehicle does not unlock or lock with fob
•No response when attempting to start the engine
•Indicator light on the key fob does not illuminate
•Battery warning light may appear on the dashboard

Diagnostic Steps

1
Check the key fob battery by opening the fob casing.
2
Inspect the key fob for physical damage or water exposure.
3
Attempt to manually unlock the car using the physical key.
4
Replace the fob battery with a new one (typically CR2032).
5
Test the fob after battery replacement.
6
Use an OBD-II scanner to check for any related error codes.

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
•New key fob battery (CR2032)
•Multimeter (optional)
•OBD-II scanner (optional)

Parts Required

•Key fob battery (CR2032)

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Diagnostic Steps

1
Check the key fob battery by opening the fob casing.
2
Inspect the key fob for physical damage or water exposure.
3
Attempt to manually unlock the car using the physical key.
4
Replace the fob battery with a new one (typically CR2032).
5
Test the fob after battery replacement.
6
Use an OBD-II scanner to check for any related error codes.

Solution

1. Preparation

Gather tools: small flathead screwdriver, new key fob battery (CR2032), and a multimeter (optional).
Ensure the vehicle is in a secure location.

2. Open the Key Fob

Use the small flathead screwdriver to gently pry open the key fob casing.
Carefully separate the two halves without damaging the internal components.

3. Replace the Battery

Remove the old battery from the key fob.
Insert the new CR2032 battery, ensuring the positive (+) side is facing up.
Reassemble the key fob by snapping the two halves back together.

4. Test the Key Fob

Stand near the vehicle and press the lock/unlock buttons on the key fob.
Verify that the vehicle responds correctly by locking and unlocking.

5. Reprogram the Key Fob (if necessary)

If the fob still does not work, it may need to be reprogrammed:
1. Insert the key into the ignition and turn it to the "On" position (do not start the engine).
2. Remove the key and within 5 seconds, insert it back and turn to "On" five times in rapid succession.
3. The doors should lock and unlock to indicate the programming mode.
4. Press any button on the key fob to complete the programming.