how can I fix the key fob not working issue on my Toyota Corolla E170 (2013-2019)?

Toyota Corolla E170 (2013-2019)

Error Codes

30 minutes - 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

468 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

30 minutes - 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is turned off before working on the key fob.

Symptoms

•Key fob buttons not responding
•No visual or audible feedback when buttons are pressed
•Vehicle does not unlock or lock via remote
•Indicator light on the key fob not illuminating
•Difficulty starting the vehicle (if the fob uses push-to-start)

Diagnostic Steps

1
Replace the key fob battery and check functionality.
2
Inspect the key fob for physical damage or water ingress.
3
Check for interference from other electronic devices nearby.
4
Verify if the vehicle's battery is charged and functioning properly.
5
Attempt to reprogram the key fob using the vehicle's onboard programming method.
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 flat-head screwdriver
•Multimeter (optional)

Parts Required

•CR2032 battery

Related Faults

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Diagnostic Steps

1
Replace the key fob battery and check functionality.
2
Inspect the key fob for physical damage or water ingress.
3
Check for interference from other electronic devices nearby.
4
Verify if the vehicle's battery is charged and functioning properly.
5
Attempt to reprogram the key fob using the vehicle's onboard programming method.
6
Use an OBD-II scanner to check for any related error codes.

Solution

1. Preparation

Gather tools: small flat-head screwdriver, multimeter (optional), and replacement battery (typically CR2032).
Ensure the vehicle is parked in a safe location with the ignition off.

2. Replace Key Fob Battery

Sub-steps:
1. Use the small flat-head screwdriver to gently pry open the key fob casing.
2. Carefully remove the old battery and note the orientation.
3. Insert the new battery in the same orientation (positive side facing up).
4. Snap the key fob casing back together until it clicks securely.

3. Check for Damage

Sub-steps:
1. Inspect the key fob for cracks or signs of wear.
2. Check the internal components for corrosion or damage.
3. If damaged, consider replacing the key fob entirely.

4. Reprogram Key Fob (if needed)

Sub-steps:
1. Sit in the vehicle with all doors closed and locked.
2. Insert the key into the ignition and turn to the "ON" position (do not start the engine).
3. Press and hold the "Unlock" button on the key fob for about 5 seconds.
4. While holding the "Unlock" button, press the "Lock" button five times.
5. Release the "Unlock" button and turn the ignition off.
6. Test the key fob to see if it functions correctly.