why does my key fob not work with my Toyota Corolla E170 (2013-2019)?

Toyota Corolla E170 (2013-2019)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

470 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is off and in a secure location before attempting repairs

Symptoms

•Key fob buttons do not respond when pressed
•Vehicle does not recognize the key fob when attempting to start
•Red LED light on the key fob does not illuminate
•Doors do not lock or unlock remotely
•Battery warning light illuminated on the dashboard (if applicable)

Diagnostic Steps

1
Inspect the key fob for physical damage or signs of wear
2
Replace the battery in the key fob with a new CR2032 battery
3
Check for interference from other electronic devices or nearby sources
4
Attempt to reprogram the key fob using the vehicle's onboard programming procedure
5
Scan for error codes using an OBD-II scanner to identify any related issues with the vehicle's immobilizer system

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
•OBD-II scanner (if needed)

Parts Required

•CR2032 battery for key fob

Related Faults

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Diagnostic Steps

1
Inspect the key fob for physical damage or signs of wear
2
Replace the battery in the key fob with a new CR2032 battery
3
Check for interference from other electronic devices or nearby sources
4
Attempt to reprogram the key fob using the vehicle's onboard programming procedure
5
Scan for error codes using an OBD-II scanner to identify any related issues with the vehicle's immobilizer system

Solution

1. Preparation

Gather the necessary tools: a new CR2032 battery, a small flathead screwdriver, and an OBD-II scanner (if needed).
Ensure the vehicle is in a safe, well-ventilated area and that the ignition is off.

2. Replace the Key Fob Battery

Use the small flathead screwdriver to carefully pry open the key fob casing.
Remove the old CR2032 battery from the fob.
Insert the new CR2032 battery, ensuring the positive (+) side is facing up.
Reassemble the key fob casing until it clicks securely into place.

3. Reprogram the Key Fob (if necessary)

Sit in the driver's seat and close all doors.
Insert the key into the ignition and turn it to the "ON" position.
Within 5 seconds, turn the key back to "OFF" and remove it from the ignition.
Press and hold the “LOCK” button on the key fob for 1 second.
Repeat the above steps two more times for a total of three cycles (ON-OFF).
Turn the ignition to "ON" again, and test the key fob.