The indicator lamp on the remote control key lights up when you press the buttons.

Indicator lamp on remote control key

The indicator lamp should light up once briefly when you press one of the buttons briefly. The indicator lamp should flash when you press and hold one of the buttons (convenience open/close).

If the indicator lamp does not light up, this means the battery is exhausted and must be replaced. The instrument cluster display also shows the symbol and the following message if the battery is exhausted:

Please change key battery