Alarm Signal Outputs
An external (aftermarket) alarm unit can be connected to the accessory electronic module (AEM). The system consists of four output signals that via a cable harness can be used as input signals in the external alarm system. The accessory electronic module (AEM) uses the existing CAN-network to receive/transmit signals that describe the car's alarm, key, and door status.
When installing an after market alarm system the car must be configured using new software. Configuration is carried out via VIDA (Volvo scan tool).
There are diagnostics for the alarm signal outputs.