Alarm Signal Outputs

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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.