my Toyota Corolla E170 (2013-2019) remote key fob is not working, what should I do?

Toyota Corolla E170 (2013-2019)

Error Codes

30 minutes to 1 hour

Time

medium

Difficulty

medium

Severity

3 min read

495 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 and solutions.

Affected Component

Electrical

Estimated Time

30 minutes to 1 hour

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the ignition is off while working on the key fob to avoid accidental starting.

Symptoms

•Remote key fob does not lock or unlock the doors
•No LED light activation when buttons are pressed
•Inability to start the vehicle using the remote
•Weak or intermittent signal when attempting to use the fob
•Battery warning light on the dashboard may illuminate

Diagnostic Steps

1
Check the battery of the key fob by opening it and visually inspecting for corrosion or damage.
2
Replace the battery in the key fob and test functionality.
3
Ensure that the vehicle's central locking system is working manually using the physical key.
4
Scan the vehicle for any error codes related to the keyless entry system using an OBD-II scanner.
5
Inspect the key fob for physical damage or water exposure.
6
Verify that the vehicle is within range of the key fob when attempting to use it.

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

Parts Required

•Key fob battery (CR2032 or as specified in owner manual)

Related Faults

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Diagnostic Steps

1
Check the battery of the key fob by opening it and visually inspecting for corrosion or damage.
2
Replace the battery in the key fob and test functionality.
3
Ensure that the vehicle's central locking system is working manually using the physical key.
4
Scan the vehicle for any error codes related to the keyless entry system using an OBD-II scanner.
5
Inspect the key fob for physical damage or water exposure.
6
Verify that the vehicle is within range of the key fob when attempting to use it.

Solution

1. Preparation

Gather tools: small flathead screwdriver, a new key fob battery (CR2032 or as specified in owner manual), OBD-II scanner.
Ensure the vehicle is parked in a safe location and the ignition is off.

2. Replace Key Fob Battery

Use the small flathead screwdriver to gently pry open the key fob casing.
Carefully remove the old battery and dispose of it properly.
Insert the new battery in the correct orientation (positive side facing up).
Snap the key fob casing back together until it clicks securely.

3. Reprogram Key Fob (if necessary)

Sit inside the vehicle with all doors closed.
Insert the key into the ignition and turn it from "OFF" to "RUN" five times within 10 seconds, ending in "RUN."
The doors should lock and unlock to indicate programming mode is activated.
Press any button on the key fob to program it. The doors should lock and unlock again.
Turn the ignition off and test the key fob.