Phone Module (PHM) (2003-2005): Function: CARPHONE

WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2014 Volvo XC90, 2013 Volvo XC90, 2012 Volvo XC90, 2011 Volvo XC90, and 2010 Volvo XC90. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying Carphone Network

Courtesy of VOLVO CARS CORPORATION

The phone module (PHM) (16/60) for the XC90 does not have its own keypad to control the menus. It uses the keypad on the infotainment control module (ICM) (16/1) panel.

When controlling the menus via the steering wheel buttons (3/131), the information is transmitted from the steering wheel module (SWM) (3/130) to the infotainment control module (ICM) via the CAN network. The information is then sent on to the phone module (PHM) via the MOST network.

The menu is displayed for the user in the infotainment control module's (ICM) display. The information is transmitted from the phone module (PHM) to the infotainment control module (ICM) via the MOST network.

When the phone module (PHM) is started, a request is transmitted to the infotainment control module (ICM) to use the display when there are incoming calls or when the carphone is in use.

Telephone calls can be made either hands free or using the handset. The phone module (PHM) for the XC90 does not have its own microphone or loudspeaker for hands free.

The microphone and loudspeaker for the Audio module (AUD) (16/105) are used instead for hands free calls. The phone module (PHM) transmits a request to the infotainment control module (ICM) to access the audio module (AUD) loudspeaker and microphone.

Communication between the phone module (PHM), infotainment control module (ICM) and audio module (AUD) is via the MOST network.