Switches For VOLVO On Call

Fig 1: Identifying Phone Module (PHM) Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

The switches for ON CALL and SOS are on the dashboard under the switch for the hazard warning flashers. The switches are only for phone modules (PHM) with Volvo On Call functionality.

The switches are directly connected to the phone module (PHM).

The switches are powered and grounded via the phone module (PHM). The luminance is regulated by a pulse width modulated signal.

There are diagnostics for the switches.