Design

Design

Carphone antenna




The carphone antenna is directly connected to the phone module (PHM).
The carphone antenna is in the front windshield in front of the rear view mirror.
There are diagnostics for the antenna.

Handset




The handset is directly connected to the phone module (PHM). The handset is in the center console.
The phone module (PHM) determines whether to connect the call using hands free or the handset, depending on the signal from the cradle. When the handset is in the cradle, all voice calls are hands free. The handset is activated when it is removed from the cradle. The cradle signal to the phone module (PHM) is controlled by a solenoid switch in the handset. The switch is closed by a magnet in the cradle. When the handset is in the cradle, the cradle signal to the phone module (PHM) is 0 V. The signal is 5 V when the handset is in use.
There are diagnostics for the handset.

SIM card holder




The holder for the customer's private SIM card is in the keypad for the infotainment control module (ICM). The SIM card holder is connected to the phone module (PHM) via serially connected wiring.
There are diagnostics for the SIM card holder.