How can I fix the key fob not working in a Toyota Camry XV70?

Toyota Camry XV70 (2018-2024)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

4 min read

627 words

Problem Statement

Learn how to diagnose and fix a non-working key fob for Toyota Camry XV70 (2018-2024) with step-by-step instructions.

Affected Component

key fob

Estimated Time

1-2 hours

Symptoms

•Key fob unresponsive to button presses.
•Doors do not lock/unlock remotely.
•Engine does not start using the key fob.
•Indicator lights on the key fob do not illuminate when buttons are pressed.

Diagnostic Steps

1
Open the key fob using a flathead screwdriver. Look for a small slot or indentation to pry open the fob.
2
Remove the battery and check for corrosion or damage.
3
Use a multimeter to check the battery voltage.
4
Replace the battery with a new CR2032 battery if needed.
5
Press any button on the fob to check functionality.
6
Reprogram the key fob if necessary.

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

•Flathead screwdriver
•Phillips screwdriver (if needed)
•Multimeter (optional for testing battery voltage)
•Replacement battery (CR2032 for Toyota key fobs)
•OBD-II scanner (optional)

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Fixing a Non-Working Key Fob for Toyota Camry XV70 (2018-2024)

Symptoms:

Key fob unresponsive to button presses.
Doors do not lock/unlock remotely.
Engine does not start using the key fob.
Indicator lights on the key fob do not illuminate when buttons are pressed.

Step 1: Diagnosing the Key Fob Issue

Tools Required:

Flathead screwdriver
Phillips screwdriver (if needed)
Multimeter (optional for testing battery voltage)
Replacement battery (CR2032 for Toyota key fobs)

Step 2: Reprogramming the Key Fob

Tools Required:

No special tools required for this step.

Reprogramming Instructions:

Enter Programming Mode:
- Sit inside the car with all doors closed.
- Insert the key into the ignition and turn it to the "ON" position (not starting the engine) and back to "OFF" five times within 10 seconds. The doors should lock and unlock to indicate that the car is in programming mode.
Program the Key Fob:
- Press any button on the key fob. The doors should lock and unlock again to confirm that the fob has been programmed.
- You can program up to 5 key fobs in this manner. If programming multiple fobs, repeat this step for each one.
Exit Programming Mode:
- To exit programming mode, turn the ignition to the "OFF" position. The doors should lock and unlock again to indicate that the programming mode has ended.

Step 3: Further Diagnosis if Key Fob Still Doesn't Work

Tools Required:

OBD-II scanner (optional)

Further Diagnostic Steps:

Check for DTCs:
- If the key fob still doesn’t work, connect an OBD-II scanner to check for any Diagnostic Trouble Codes (DTCs) that might indicate an issue with the vehicle’s body control module (BCM) or immobilizer system.
Inspect the Key Fob Circuit Board:
- If the fob LED does not light up after battery replacement, inspect the internal circuit board for any visible damage or loose connections.
Check Vehicle Antenna:
- If the key fob is still unresponsive, the vehicle's antenna or receiver module might be faulty. This may require professional diagnosis.

Step 4: Replacement of Key Fob

Tools Required:

None specific for this step.

Replacement Instructions:

Order a Replacement Key Fob:
- If all else fails, you may need to purchase a replacement key fob from a Toyota dealership or authorized retailer.
Program the New Key Fob:
- Follow the same reprogramming steps mentioned in Step 2 above to program the new key fob.

Summary

By following these detailed steps, you can diagnose and potentially fix a non-working key fob for a Toyota Camry XV70. Remember to replace the battery first, and if all fails, consider reprogramming or replacing the key fob. If the problem persists, it may be best to consult a certified Toyota technician for further assistance.