If you open the door before the key fob’s authentication has finished, the siren may sound. This is not a malfunction.

The AUTHOR ALARM key fob authenticates with your vehicle using radio waves. The key fob starts authentication when it is within approximately 10 m of the vehicle. However, if you keep it inside a radio-blocking pouch, come right up to the side of the car, and then take it out on the spot, authentication may take about 5 seconds at the earliest, and in some situations about 15–20 seconds, to complete.

If you reach for the door handle and open the door before authentication is finished, the situation will be the same as opening the door before authentication, and the siren may sound.

As you approach the vehicle, please take the key fob out of the pouch promptly and use it. Even if the siren sounds, it will stop once authentication is complete. If it does not stop, perform manual authentication.

Also, how easily the key fob's signal reaches the car varies by unit, and the time needed for authentication also depends on the environment and the key fob's battery level. In an environment where your car is right outside your front door, this same situation can easily occur whenever authentication happens to take longer. We recommend taking the key fob out of the radio-blocking pouch early — for example in the morning or before you head out — so it is already within range. That way, the door will open smoothly as soon as you approach the car.

However, if the key fob is left near the car (within signal range) all the time, standby power consumption rises to three to four times, which can cause the battery to go flat. Taking it out before you head out is fine, but please avoid leaving it near the car, for example at home.