Alarm Signal Outputs

Fig 1: Identifying Alarm Signal Outputs

Courtesy of VOLVO CARS OF NORTH AMERICA.

Output signals from the accessory electronic module (AEM) (4/78) are used when installing an after market alarm unit.

Access is available to signals indicating:

• alarm status
• door status
• key status.

In this case the accessory electronic module (AEM) functions as a port between the Controller area network (CAN) of the vehicle and the after market alarm unit.