my Toyota Corolla E170 (2013-2019) key fob isn't working, how can I fix it

Toyota Corolla E170 (2013-2019)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

556 words

Problem Statement

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

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Handle the key fob carefully to avoid damaging the internal components.
•Ensure that the vehicle is turned off during the battery replacement and programming process.

Symptoms

•Key fob buttons do not respond
•No response from the vehicle when pressing the key fob
•Indicator lights on the key fob not illuminating
•Engine does not start with the key fob present
•Warning light for key fob system illuminated on the dashboard

Diagnostic Steps

1
Check the battery condition of the key fob using a multimeter.
2
Replace the battery in the key fob to rule out battery failure.
3
Test the key fob by reprogramming it to the vehicle.
4
Inspect the key fob for physical damage or water exposure.
5
Verify the vehicle's receiver module is functioning properly.

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
•CR2032 battery (or specific battery type for your fob)
•Multimeter

Parts Required

•CR2032 battery (or specific battery type for your fob)

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Diagnostic Steps

1
Check the battery condition of the key fob using a multimeter.
2
Replace the battery in the key fob to rule out battery failure.
3
Test the key fob by reprogramming it to the vehicle.
4
Inspect the key fob for physical damage or water exposure.
5
Verify the vehicle's receiver module is functioning properly.

Solution

1. Preparation

Gather the necessary tools: a small flathead screwdriver, a CR2032 battery (or specific battery type for your fob), and a multimeter.
Ensure you are in a well-lit area to avoid losing small components.

2. Replace Key Fob Battery

Open the Key Fob:
- Use the small flathead screwdriver to gently pry open the key fob casing.
- Take care to avoid damaging the clips holding the casing together.
Remove Old Battery:
- Note the orientation of the old battery before removing it.
- Use the screwdriver to gently push the battery out of its compartment.
Install New Battery:
- Insert the new CR2032 battery (or the correct type) in the same orientation as the old one.
- Ensure it is seated properly in the compartment.
Reassemble Key Fob:
- Align the two halves of the fob and press them together until they click into place.

3. Reprogram Key Fob

Enter Programming Mode:
- Insert the key into the ignition and turn it to the "ON" position without starting the engine.
- Turn the key back to "OFF" and remove it from the ignition. Repeat this step five times within 10 seconds.
- The locks should cycle, indicating the vehicle is in programming mode.
Program the Key Fob:
- Press any button on the key fob to program it. The locks should cycle again to confirm successful programming.
Exit Programming Mode:
- Turn the ignition back to the "ON" position to exit programming mode.