Switches For Doors, Tailgate/Trunk Lid And Hood

There are switches in the lock units on the side doors and tailgate/trunk lid which indicate whether the doors or trunk lid/tailgate are open or closed. These switches are also known as door open sensors. There is also a separate switch at the hood if the car has an alarm. There is no switch at the fuel tank filler cover. The switches are closed when the door is closed, providing a ground connection to the central electronic module (CEM).