my Toyota Corolla E170 (2013-2019) key fob is not working what could be the issue

Toyota Corolla E170 (2013-2019)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

433 words

Problem Statement

Learn how to diagnose and fix a non-functioning key fob for Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms 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 when working on the key fob to prevent accidental unlocking or starting.

Symptoms

•Key fob buttons unresponsive
•No LED light when buttons are pressed
•Key fob not detected by the vehicle
•Difficulty starting the engine using the key fob
•Battery drain in the vehicle (if fob is stuck in the ignition)

Diagnostic Steps

1
Replace the battery in the key fob and test functionality.
2
Check for physical damage to the key fob casing.
3
Inspect the vehicle’s keyless entry receiver for faults.
4
Scan the vehicle for any stored trouble codes related to the keyless entry system.
5
Test the key fob with a secondary vehicle (if available) to confirm if the fob is functional.

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
•Replacement battery (typically CR2032)

Parts Required

•Replacement battery (CR2032)

Related Faults

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Diagnostic Steps

1
Replace the battery in the key fob and test functionality.
2
Check for physical damage to the key fob casing.
3
Inspect the vehicle’s keyless entry receiver for faults.
4
Scan the vehicle for any stored trouble codes related to the keyless entry system.
5
Test the key fob with a secondary vehicle (if available) to confirm if the fob is functional.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is in a safe area with adequate lighting.

Tools Required:

Small flat-head screwdriver
Replacement battery (typically CR2032)

2. Replace Key Fob Battery

Use the small flat-head screwdriver to gently pry open the key fob casing, taking care not to damage the plastic.
Remove the old battery and note its orientation for the replacement.
Insert the new battery, ensuring it matches the orientation indicated in the fob.
Snap the key fob casing back together securely.

3. Test Key Fob Functionality

Stand close to the vehicle and press the lock/unlock buttons on the key fob.
Observe if the vehicle responds to the key fob commands.
If the issue persists, proceed to check the vehicle's keyless entry receiver.

4. Inspect Keyless Entry Receiver

Access the keyless entry module located under the dashboard or near the driver's seat.
Check for any loose connections or damage to the module.
Ensure all wiring is intact and secure.