Door Open Sensor

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2013 Volvo C70, 2012 Volvo C70, 2011 Volvo C70, 2010 Volvo C70, and 2009 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Door Open Sensor

Courtesy of VOLVO CARS CORPORATION

The door open sensor is a switch mounted in the lock units of the side doors and the tailgate/trunk lid. On vehicles with an alarm there is a single switch on the hood. The switches are closed when the door or tailgate/trunk lid is shut.

The C30 and C70 do not have door open sensors for the rear side doors as they do not have any rear doors.

When the alarm is activated, the central electronic module (CEM) checks every 3 times / second that the switches are closed. If the central electronic module (CEM) detects that a switch is open the alarm is triggered.

If the central electronic module (CEM) detects that a switch is not closed when the central locking and alarm activation command is received, the vehicle tilt sensor and mass movement sensor module (MMS) alternatively ultrasonic sensor module (IMS) will not be activated. Similarly, no attention will be paid to signals from a door open sensor not closed on activation.