System Overview

Phone Module (PHM)

System Overview

Control module

Phone Module (PHM):

There are two versions of the phone module (PHM), with or without Volvo On Call functionality (market dependent).

The main task of the phone module (PHM) is to manage the following functions:
- voice calls
- automatic connection to the Service Center in the event of a collision or alarm (Volvo On Call)
- connection to the Service Center for other services when the SOS or ON CALL button is pressed (Volvo On Call).

The control module is above the glove compartment inside the dashboard.

A phone module (PHM) with Volvo On Call functionality cannot be installed as an aftermarket option.

The phone module (PHM) communicates partly with directly connected components and partly with other control modules via the CAN and MOST networks. All diagnostic communication between VIDA and the phone module (PHM) occurs via the CAN network.

The phone module (PHM) does not have its own keypad. It uses the menus in the keypad on the climate control module (CCM) and the display on the infotainment control module (ICM).

The control module checks activations and input and output signals via an integrated diagnostic system. 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 Volvo On Call functionality, the driver will also be notified via a message in the driver information module (DIM) if a diagnostic trouble code (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 MOST network communication and the system is switched off.

Phone module (PHM) has a SIM-card reader for the customer's private telephone subscription.
For phone module (PHM) with Volvo On Call-function there is also an internal SIM-card. This subscription is only connected to the service center that provides Volvo On Call-services.

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 Volvo On Call function has an integrated backup battery.
The spare battery shall ensure that the module is supplied with voltage when a Volvo On Call-service is activated in case the battery voltage is not available. The remaining 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 30% of full capacity, a diagnostic trouble code is generated. Calculated 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 hands-free 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.

Signals
The following table summarizes the input signals to and output signals from the phone module (PHM). The signal types are divided into directly connected signals, MOST and CAN communication. The illustration below displays the same information with the Volvo component designations.










Design

Antenna







A separate antenna belongs to the telephone. This antenna contains a GPS antenna and a telephone antenna.
The phone antenna is directly connected to the phone module (PHM).
The GPS-antenna is connected only when the GPS-position is not available from other control modules in the vehicle, then it is directly connected to the phone module (PHM).
The antenna is installed on the roof.

Telephone and GPS-antennas can be diagnosed.

Handset







The handset is directly connected to the phone module (PHM). The handset is in the center console.

Phone module (PHM) decides if the call is to be connected via hands-free or handset based on the set's hook signal. When the set is located in its holder, then all voice calls are connected via hands-free.
The set is activated when it is removed from the holder. Note that the voice call does not pass via the handset if it is lifted when an incoming call arrives or outgoing call is started with the ENTER button. Then you have to put down the set and lift it again to take the call via the handset. The cause of this is to avoid lost sound when the handset is lifted off by mistake.
The hook signal to the phone module (PHM) is controlled by a magnet switch located in the set. The switch is closed by a magnet located in the holder.

There are diagnostics for the handset.

SIM card holder







The holder for the customer's private SIM card is inside the glove compartment at the top left-hand side. The SIM card holder is directly connected to the phone module (PHM).

There are diagnostics for the SIM card holder.

Switches for Volvo On Call







The switches for ON CALL and SOS are located in the instrument panel under the switch for the hazard flashers. The switches are only for the phone module PHM) with the Volvo On Call functionality.

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

The switches also contain an emergency microphone.

Switch illumination receives is power supply and ground via the phone module (PHM).

There are diagnostics for the switches.

Function

Carphone







The phone module (PHM) (16/60) does not have its own menu keypad. It is controlled via the keypad of the climate control module (CCM) (3/112) or via the steering wheel buttons.
The climate control module (CCM) transmits menu navigation signals to the infotainment control module (ICM) (3/281) via the CAN network. The infotainment control module (ICM) then forwards the signals to the phone module (PHM) via the MOST network.

When using the menu via the steering wheel buttons information is transmitted from the steering wheel module (SWM) (3/254) to the infotainment control module (ICM) via LIN communication. The information is then transmitted to the phone module (PHM) via the MOST network.

Menu information is shown on the display on the infotainment control module (ICM). 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, when there are incoming calls or when the carphone is in use, a request is transmitted to the infotainment control module (ICM) to use the display.

Phone calls can be connected either via hands-free or via handset.
For calls via hands-free the microphone and speakers connected to audio module (AUD) (16/105) are used.
Phone module (PHM) sends a request to infotainment module (ICM) to obtain access to speakers and microphone. Infotainment module (ICM) sends a request on to audio module (AUD).
Communication between phone module (PHM), infotainment module (ICM) and audio module (AUD) takes place via MOST-net.

Volvo On Call







Volvo On Call is a system developed by Volvo which gives the owner access to various safety and service features. The system has been developed to give the driver and passengers rapid connection to the Volvo On Call Service Center using the carphone. The staff at the service center determine the action required depending on the circumstances. Using the data provided by the Volvo On Call system, the Service Center is able to identify the exact position of the car so that emergency and/or breakdown services can be directed quickly to the car. The different services provided by the Service Center can be divided into two categories, safety and service.

A Volvo On Call service can be activated in any of the following ways:
- by the customer using the switches for Volvo On Call (3/267)
- by the Volvo On Call Service Center
- by the vehicle system.

The strength of the lighting in the switches for Volvo On Call is controlled via the rheostat in the light switch module (LSM) (3/111).
Phone module (PHM) (16/60) receives the rheostat signal from the central electronic module (CEM) (4/56) via infotainment control module (ICM) (3/281) on the MOST network.

When activating a Volvo On Call service, the phone module (PHM) transmits information to the infotainment control module (ICM). The infotainment control module (ICM) transmits this data onwards to the driver information module (DIM)(5/1) so that a text message is displayed indicating that a Volvo On Call service has been activated and its status.

Each time a Volvo On Call service is started, the relevant vehicle data is transmitted to the Volvo On Call Service Center. The vehicle data contains information about:

- Call type. SOS or On Call service.
- The time the message was sent. Phone module (PHM) receives information on time from the central electronic module (CEM) via the CAN network.
- The Vehicle VIN number. Phone Module (PHM) receives information from the central electronic module (CEM) via the controller area network (CAN).
- Alarm status (deactivated, activated, deployed). The phone module (PHM) receives information about the status of the alarm from the central electronic module (CEM) via the controller area network (CAN).
- Position of the ignition key. The Phone module (PHM) receives information about the position of the ignition key (in/out, position I, II or III) from the central electronic module (CEM) via the controller area network (CAN).
- Vehicle's position. Phone module (PHM) receives the vehicle's position from multimedia module (MMM) (16/108) via the MOST-net or via the direct-connected GPS-antenna).
- Voltage source. The voltage source that is used by the phone module (PHM), main or back-up battery.
- Engine running or not. The phone module (PHM) receives a signal from the central electronic module (CEM) via the controller area network (CAN).
- Fuel volume. The phone module (PHM) receives the information about the remaining fuel volume from the central electronic module (CEM) via the controller area network (CAN).
- Status of main battery. The phone module (PHM) receives information about the voltage over the main battery from the central electronic module (CEM) via the controller area network (CAN).
- Ambient and internal temperature. The phone module (PHM) receive information about the ambient temperature from the central electronic control module (CEM) and the internal temperature from the climate control module (CCM) (3/112) via the controller area network (CAN).
- Locked/unlocked. The phone module (PHM) receives information about whether the vehicle is locked from the inside or from the outside, from the Central electronic module (CEM) via the controller area network (CAN).
- Front and rear side window open/closed. Phone module (PHM) receives information about status of front and rear side windows from driver door module (DDM) (3/126) and passenger door module (PDM) 3/127) via the CAN-net.
- SRS activated or not. The phone module (PHM) receives information about whether the vehicle has been in a collision and the SRS system has been activated. The information is received from the Supplemental restraint system module (SRS) (4/9), both via the controller area network (CAN) and the collision cable. The collision cable runs from the Supplemental restraint system module (SRS) to the phone module (PHM) and the central electronic module (CEM). The collision cable is a backup solution in the event of the controller area network (CAN) communication disappearing.

Safety
An SOS service can be started in two different ways:
- automatically, in the event of a collision when a component in the SRS system has been activated
- manually, by the customer pressing the SOS button or selecting the service from the carphone menu.

In a collision where an SRS component is activated the signal is transmitted from the supplemental restraint system module (SRS) to the phone module (PHM). The phone module (PHM) transmits the vehicle data to Volvo On Call Service Center which connects a call to the vehicle. The call is made in order to establish what action is necessary, for example, whether an ambulance or recovery vehicle is required.

When a Volvo On Call service has been activated the reserve battery is used if there is not sufficient voltage in the main battery.

Service
The Volvo On Call Service Center gives the customer access to various services, such as:
- roadside assistance, for example in the event of a puncture or running out of fuel
- remote unlocking of the vehicle
- car tracking, can be activated at the request of the customer if the car is stolen
- notification to the owner when the alarm is activated.

The services that the customer can access vary between different markets.

The car is unlocked remotely after the owner has contacted the Volvo On Call Service Center, identified themselves with a password and requested the required service. The owner and the Volvo On Call Service Center then decide the time at which the car will be unlocked. The Service Center will then send a command to the phone module (PHM) to unlock the car.

Central electronic module (CEM) will then send a signal via the CAN-net to phone module (PHM) when the tailgate's handle is closed. The phone module (PHM) sends, if the signal from central electronic module (CEM) is within the time interval preset by the customer and Volvo On Call Service Center, via the CAN-net, a request to central electronic module (CEM) that the vehicle shall be unlocked.
Then phone module (PHM) sends a confirmation to Volvo On Call Service Center that the vehicle is unlocked.
When any of the doors or the tailgate is opened, the alarm is triggered. The alarm is active until it is turned off correctly.

If the alarm is activated, for example during an attempted theft, data about the status of the alarm is transmitted from the central electronic module (CEM) to the phone module (PHM) via the CAN network. If the alarm is active for more than 15 seconds, the phone module (PHM) transmits vehicle data to the Volvo On Call Service Center. The Center then contacts the owner to tell them what has happened.
Primarily, Volvo On Call Service Center calls the vehicle, if the person cannot give the correct password, you then call the second number that the owner has given to Service center.

If the car has been stolen, the owner can ask the Service Center to trace the car. The Service Center then transmits a request to the phone module (PHM) to continuously transmit vehicle data. The Volvo On Call Service Center determines the interval at which vehicle data is transmitted.