Lights-On Warning Chime
WARNING: This page is about a different car, the 2018 Jaguar XE and 2017 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition is in the off (power mode 0) or auxiliary (power mode 4) mode and the left steering column multifunction switch is in the side lamp or low beam position, a warning chime will sound if the driver door is opened. This indicates to the driver that the exterior lights have been left on. The chime is generated from IC sounder on receipt of a lights-on signal, a door open signal and an ignition off signal from the BCM/GWM assembly.