my Toyota Corolla E140 (2006-2013) key fob is not working what's the problem

Solution

1. Preparation

• Gather necessary tools: small screwdriver, replacement battery (typically CR2032), multimeter.
• Ensure the vehicle is in park and the ignition is off.

2. Replace Key Fob Battery

• Sub-steps:
  1. Open the key fob using a small screwdriver to pry apart the two halves carefully.
  2. Remove the old battery and dispose of it properly.
  3. Insert the new battery, ensuring the polarity (+ and -) matches the original configuration.
  4. Snap the key fob halves back together securely.

3. Test the Key Fob

• Sub-steps:
  1. Stand close to the vehicle and press the lock/unlock buttons on the fob.
  2. Observe if the vehicle responds to the commands.
  3. If the key fob still does not work, proceed to reprogramming.

4. Reprogram the Key Fob

• Sub-steps:
  1. Insert the key into the ignition and turn to the "ON" position without starting the engine.
  2. Within 5 seconds, turn the key back to "OFF" and repeat this step twice more, ending in "ON."
  3. After the third time, leave the key in the "ON" position. The door locks should cycle to indicate programming mode.
  4. Press any button on the key fob within 30 seconds to register it.
  5. Turn the ignition to "OFF" to exit programming mode.