Control Module
The main task of the Phone Module (PHM) is to manage the following functions:
- Voice call. (For vehicles with structure week 201446-, only applies to the USA market.)
- automatic connection to service centers in the event of a collision or alarm (Volvo On Call).
- Connecting to service center for other services when pressing SOS- or ON CALL-button (Volvo On Call) or via the front display screen.
- Applications.
- Connected Service Booking.
The control module is above the glove compartment inside the dashboard.
The Phone Module (PHM) communicates partly with directly connected components and partly with other control modules via the CAN and USB. All diagnostic communication between VIDA and the Phone Module (PHM) occurs via the CAN.
The Phone Module (PHM) does not have its own menu keypad. It is controlled via the keypad on the Climate Control Module (CCM) together with the infotainment system.
The control module checks performed activations, as well as input and output signals via built-in diagnostics. A Diagnostic Trouble Code (DTC) is stored if the control module detects an error. In certain cases the control module replaces the faulty signal with a substitute value. For Phone Modules (PHM) with the Volvo On Call function, the driver is also notified by a message in the combination instrument panel when a DTC is stored.
Any diagnostic trouble codes (DTCs) are stored in the control module memory. This information can be read off using VIDA via the Data Link Connector (DLC) in the vehicle.
If the Phone Module (PHM) is not powered, there will be no USB and CAN communication and the system is switched off.
The Phone Module (PHM) can manage two SIM cards:
- An external SIM card (also known as P-SIM, for "personal"). This is used for WiFi, HotSpot, subscriptions, connected service booking and web navigation functions. The card is installed in the glove box.
- A SIM card (also known as T-SIM, for "telematic") for Volvo On Call as well as certain service data that can be read out in connection with use of Volvo On Call. The card is directly installed on the circuit board. This subscription is only connected to the service center that supplies the Volvo On Call services. (For the USA market, vehicles with structure week 201446- can also call with this SIM card.)
For further information, also see SIGNALS .
The following applies only to carphones with Volvo On Call
An initiated Volvo On Call service is always assigned higher priority than a standard private call. It will not be possible to make normal calls, and ongoing calls will be interrupted, while the Volvo On Call function is active.
The Phone Module (PHM) with the Volvo On Call function has a built-in spare battery. The spare battery must ensure that the control module is supplied with voltage when a Volvo On Call service is activated if normal battery voltage is not available. This means that the main battery should be disconnected as short time as possible to save the spare battery. The residual capacity of the spare battery is calculated by the control module.
At battery change the level of the capacity must be reset to full value. This is done using VIDA. When the calculated capacity has gone down to 15% of full capacity, a diagnostic trouble code is generated. The calculated service life of the spare battery is 10 years.
The Phone Module (PHM) with Volvo On Call function has a reserve microphone and speaker. The loudspeaker is inside the control module. The microphone is by the switches for Volvo On Call. The reserve microphone and speaker are only used when a Volvo On Call service is activated and the standard speaker and microphone for handsfree are not available.
The Phone Module (PHM) with the Volvo On Call function has an integrated reserve antenna. This is located internally in the control module. The reserve antenna is only used when a Volvo On Call service is activated and when the normal antenna does not function.