The sensor typically uses a switch with a spring loaded plunger that is compressed when the door is closed and is released when the door is open.
Audi door open sensor.
Open the garage door.
The door should stay open and the motor unit lights should blink.
Dome light on if your a3 thinks that the door is ajar it ll leave the dome light on.
Door contact sensors control a lot of components in modern vehicles from interior lights and alarm systems to the annoying door open warning light on the dashboard.
This action opens and closes an electrical circuit sending a signal to your vehicle s computer activating the door ajar warning light when the door is open.
Place a box or similar object between the safety sensors to block the sensing beam.
Here are the most common symptoms when the door jamb switch has failed or the door ajar warning stays on.
This article applies to the audi a6 c5 1998 2004.
On this occassion all door handles and boot sensors work when unlocking the car and all locking sensors work except on on drivers door.
The door ajar warning staying on is usually caused by a bad door jamb switch.
This can create some visibility.