my Toyota Camry Eighth Generation (2018-present) key fob not working what should I check

Toyota Camry Eighth Generation (2018-present)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

485 words

Problem Statement

Learn how to diagnose and fix a non-working key fob for your Toyota Camry (2018-present). Step-by-step guide with symptoms, diagnostics, and solutions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure that the vehicle is in the 'Off' position before working on the key fob.

Symptoms

•Key fob buttons not responding
•Vehicle does not start when the fob is inside the cabin
•Indicator light on the fob not illuminating
•Lock/unlock features inoperative from a distance
•Engine immobilizer light flashing on the dashboard

Diagnostic Steps

1
Check the battery condition of the key fob using a multimeter or by replacing it with a new battery.
2
Inspect the key fob for physical damage or wear, including cracks or water exposure.
3
Test the fob near the vehicle to ensure it is within the operational range.
4
Attempt to reprogram the key fob using the vehicle’s manual instructions.
5
Check the vehicle’s battery condition, as a weak battery can affect key fob performance.
6
Use an OBD-II scanner to check for any fault codes related to the keyless entry or 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

•Multimeter
•Small flathead screwdriver

Parts Required

•Key fob battery (CR2032)

Related Faults

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Diagnostic Steps

1
Check the battery condition of the key fob using a multimeter or by replacing it with a new battery.
2
Inspect the key fob for physical damage or wear, including cracks or water exposure.
3
Test the fob near the vehicle to ensure it is within the operational range.
4
Attempt to reprogram the key fob using the vehicle’s manual instructions.
5
Check the vehicle’s battery condition, as a weak battery can affect key fob performance.
6
Use an OBD-II scanner to check for any fault codes related to the keyless entry or immobilizer system.

Solution

1. Preparation

Gather necessary tools: small flathead screwdriver, multimeter, new battery (usually CR2032).
Ensure the vehicle is in a safe location with the ignition off.

2. Replace Key Fob Battery

Use the small flathead screwdriver to gently pry open the key fob.
Remove the old battery and note the orientation.
Insert the new battery (CR2032) in the same orientation as the old one.
Snap the key fob back together securely.

3. Reprogram the Key Fob (if necessary)

Sit inside the vehicle with all doors closed.
Insert the key into the ignition and turn it to the "On" position (do not start the engine) and then back to "Off" five times within 10 seconds.
The doors will lock and unlock to indicate the vehicle is in programming mode.
Press any button on the key fob to program it. The doors should lock and unlock again.
Turn the ignition back to the "On" position to exit programming mode.

4. Verify the Key Fob Functions

Test the lock/unlock buttons from outside the vehicle to ensure they are working.
Attempt to start the vehicle with the fob inside the cabin.