Phone Module (PHM)

Phone Module (PHM)

System Overview

Control Module







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 Plus)
- Connection to the Service Center for other services when the SOS or ON CALL button is pressed (Volvo On Call Plus).

Carphone and data communication is via AMPS (Advanced Mobile Phone System).

The phone module (PHM) is integrated in the keypad, which is beside the audio module (AUM) in the center console. If the phone module (PHM) is replaced, the keypad must also be replaced.

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

The phone module (PHM) is directly connected to the components and to the other control modules via the Controller Area Network (CAN).

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.

With phone modules (PHM) with Volvo On Call Plus 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 VADIS/VIDA via the data link connector (DLC) in the car.

The driver will also be notified that a diagnostic trouble code (DTC) has been stored by a text message displayed in the driver information module (DIM).

An easy way to check that the phone module (PHM) is powered and grounded is to switch on the carphone. Press the ON/OFF button and then the YES button to access the carphone menu. The LED in the ON/OFF button should then be on and a text message displayed in the driver information module (DIM).

Carphones with Volvo On Call Plus
An initiated Volvo On Call Plus 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 Plus function has a built-in reserve battery. The reserve battery ensures that the control module is powered in the event of a collision or alarm when there is no battery power. The remaining reserve battery capacity is calculated by the control module. When replacing the battery, the power level must be reset to the full value. This is done using VADIS/VIDA. When the calculated capacity has dropped to 30% of full capacity, a diagnostic trouble code (DTC) is stored.

The phone module (PHM) has two different subscriptions, the customer's own and a specific subscription to Volvo On Call Plus. This subscription is only connected to the Service Center which handles On Call Plus services. All customer data and codes for this subscription are processed via a website. The following changes can be made to the status of the subscription:
- activation/re-activation
- deactivation
- extension of the subscription.

The procedures are described in VADIS/VIDA under: Information manager/Repair and installation/removal, replacing and installing/39 Media, communication and navigation/Communication Radio, mobile phone.

Phone modules (PHM) with Volvo On Call Plus function have an integrated GPS receiver which establishes the position of the car. The GPS antenna is in the same unit as the carphone antenna.

Phone modules (PHM) with Volvo On Call Plus function have an integrated reserve antenna. This is in the control module. The reserve antenna is only used in the event of a collision or alarm if the regular antenna is not working.

Signals










The above table summarizes the input signals to and output signals from the phone module (PHM). The signal types are divided into directly connected signals and Controller area network (CAN) communication. The illustration displays the same information with the Volvo component designations.

Design

Carphone Antenna/GPS Antenna







The GPS and carphone antennas are directly connected to the phone module (PHM). The antennas are in the front windshield in front of the rear view mirror.

There are diagnostics for both the GPS and carphone antennas.

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 holder, all voice calls are handsfree. The handset is activated when it is removed from the holder. The cradle signal to the phone module (PHM) is controlled by a magnetic 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. When the handset is in use the signal is 5 V.

There are diagnostics for the handset.

Handsfree equipment







The handsfree equipment consists of a microphone and a speaker.

The microphone is in the rear view mirror.

The speaker is in the head restraint on the driver's seat.

There are diagnostics for the microphone and speaker.

Function

Carphone







The phone module (PHM) (16/60) menu can be controlled via the steering wheel buttons (3/131) on the right-hand side of the steering wheel module (SWM) (3/130) or by using the keypad for the phone module (PHM). When controlling the menu via the steering wheel buttons, the YES button is used to access the menu selection and then to select the required menu. The NO button is used to scroll backwards in the menus. The left and right arrows are used to shift between different menus.

The menus are displayed for the user in the text window in the driver information module (5/1). When using the phone handsfree, the +/- buttons are used to lower and raise the volume. The signals between the steering wheel module (SWM), phone module (PHM) and driver information module are transmitted on the CAN network. For safety reasons certain functions cannot be used at speeds above 8 km/h (this safety feature can be disconnected). However any function in use can be completed.

When a call is connected using handsfree, the carphone module (PHM) transmits a request via the CAN network to the audio module (AUM) (16/1) to mute the volume and to pause any CD playback.

The lighting in the keypad is controlled via a rheostat in the light switch module (LSM) (3/111). The phone module (PHM) receives the rheostat signal on the CAN network via the central electronic module (CEM) (4/56).

The carphone system has ASC (Active Sound Control). This means that the handsfree speaker is automatically adjusted to the car speed to compensate for noise. ASC can be disengaged using the menus for the carphone system. The phone module (PHM) receives a signal with speed data from the brake control module (BCM) (4/16).

Volvo On Call Plus







Volvo On Call Plus 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, using the carphone quick contact with the Volvo On Call Plus Service Center. The staff at the service center determine the action required depending on the circumstances. The Service Center, using the data provided by the Volvo On Call Plus system, are able to identify the exact position of the car so that they can direct the ambulance, police and/or breakdown services to the car. The different services provided by the Service Center can be divided into two categories, safety and service.

Each time a Volvo On Call Plus service is started, the relevant vehicle data is transmitted to the Volvo On Call Plus Service Center. The vehicle data contains information about:
- Type of call, SOS or On Call services
- The time at which the message was transmitted. The phone module (PHM) (16/60) receives time data from the central electronic module (CEM) (4/56) via the CAN network
- The car VIN number. This data is stored in the phone module (PHM)
- Alarm status (off, activated, triggered). The phone module (PHM) receives data about the status of the alarm from the upper electronic module (UEM) (4/70) via the CAN network
- Position of the ignition key. The phone module (PHM) receives information about the position of the ignition key (in/out, position 1, 2 or 3) from the central electronic module (CEM) via the CAN network
- The position of the car. The phone module (PHM) receives the position of the car from the integrated global positioning system (GPS). If there is no GPS signal, the phone module (PHM) will calculate the position based on the last known positioning. This is known as Dead Reckoning. In order to calculate the position, the phone module (PHM) uses the signal from the brake control module (BCM) (4/16). This signal contains information about the number of wheel pulses. A signal containing data about the gear position from the central electronic module (CEM) is also used
- Power source. The power source 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)
- Quantity of fuel. The phone module (PHM) receives data about the quantity of fuel remaining from the rear electronic module (REM) (4/58)
- Status of the main battery. The phone module (PHM) receives data about the voltage of the main battery from the central electronic module (CEM)
- Ambient and interior temperatures. The phone module (PHM) receives data about the interior and ambient temperatures from the central electronic module (CEM)
- Locked/unlocked. The phone module (PHM) receives data indicating whether the car is locked from the inside or outside from the central electronic module (CEM)
- Front side windows open or closed. The phone module (PHM) receives data about the status of the front side windows from the driver's door module (DDM) (3/126) and the passenger door module (PDM) (3/127)
- SRS (supplemental restraint system) activated or not. The phone module (PHM) receives data if the car has been involved in a collision indicating whether the SRS system has been activated. The data comes from the supplemental restraint system (SRS) module (4/9). Both via the CAN network and via a directly connected collision cable. The collision cable runs from the supplemental restraint system (SRS) module to the phone module (PHM) and the central electronic module (CEM). The collision cable is a back-up solution in case there is no CAN communication.

Safety
An SOS service can be started in two different ways:
- Automatically, in the event of a collision in which an SRS component has been activated
- Manually, if the customer presses the SOS button.

In a collision in which an SRS component has been activated, a signal is transmitted from the supplemental restraint system module (SRS) to the phone module (PHM). The phone module (PHM) transmits vehicle data to the Volvo On Call Plus Service Center which then connects a voice call to the car. The voice call is connected to determine the action required, e.g. ambulance, breakdown services etc. The phone module (PHM) also transmits data to the driver information module (5/1) so that a text message is displayed indicating that a Volvo On Call Plus service has been activated and its status.

The central electronic module (CEM) transmits a signal to the phone module (PHM) about the status of the main battery on the CAN network. The phone module (PHM) uses this information to determine whether the main or reserve battery should be used. When an SOS service is first activated, the phone module (PHM) will always use the reserve battery while it checks that there is sufficient voltage from the main battery. The main battery is then used if it has sufficient power.

Service
Using the ON CALL button, the customer has access to different services such as:
- Roadside assistance, for example in the event of a puncture or running out of fuel
- Remote unlocking
- 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 car is unlocked remotely after the owner has contacted the Volvo On Call Plus Service Center, identified themselves with a password and requested the required service. The owner and the Volvo On Call Plus 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.

For cars without a switch in the tailgate, the phone module (PHM) then transmits a request via the CAN network to the central electronic module (CEM), which unlocks the car at the agreed time. The phone module (PHM) then transmits a confirmation that the car has been unlocked to the Volvo On Call Plus Service Center. When one of the doors or tailgate is opened, the alarm is triggered. The alarm is then active until it is correctly deactivated.

For cars with a switch in the tailgate, the rear electronic module (REM) sends a signal via the CAN network to the phone module (PHM) when the tailgate handle is closed. If the signal from the rear electronic module (REM) matches the time interval agreed by the customer and the Volvo On Call Plus Service Center, the phone module (PHM) then transmits a request to unlock the car to the central electronic module via the CAN network. The phone module (PHM) then transmits an acknowledgement to the Volvo On Call Plus Service Center that the car has been unlocked. When one of the doors or tailgate is opened, the alarm is triggered. The alarm is then active until it is correctly deactivated.

If the alarm is activated, for example during an attempted theft, data about the status of the alarm is transmitted from the upper electronic module (UEM) to the phone module (PHM) via the central electronic module (CEM). The phone module (PHM) then transmits the vehicle data to the Volvo On Call Plus Service Center, which contacts the owner to tell them what is happening.

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

Diagnostic Functions

General
The control module has a built-in diagnostic system, Volvo Diagnostic, which continuously monitors internal functions as well as input and output signals.

Diagnostic trouble codes (DTCs)
A diagnostic trouble code (DTC) is stored if the control module detects a fault. There are approximately 18 diagnostic trouble codes (DTCs) for standard carphones, approximately 25 for carphones with Volvo On Call/Volvo On Call Plus (USA). A fault which is detected in the most recent operating cycle is defined as permanent. Other faults which are detected are defined as intermittent.

Reading and erasing diagnostic trouble codes (DTCs)
Stored diagnostic trouble codes (DTCs) can be read off and erased using this function.

Diagnostic trouble codes (DTCs) can only be erased once all the diagnostic trouble codes (DTCs) have been read off at least once.

Reading off the control module identification
The diagnostic tool identifies control modules by reading off a number of codes from the control module memory.

The codes contain information about the control module:
- hardware P/N (control module without software)
- hardware serial number (control module without software)
- software P/N
- diagnostic software P/N.

Reading off extended diagnostic trouble code (DTC) information
This function can be used to read parameters, status identifiers and counters stored at the same time as a diagnostic trouble code (DTC). These are called frozen values.

Reading off the parameter values
Using this function, the status or value of parameters can be read off. The status/value is presented digitally.

Activating/deactivating Volvo On Call Plus (USA only)
Under this title there is information about what to do when a customer wants to the change the status of their subscription for Volvo On Call Plus.

Service check for Volvo On Call/Volvo On Call Plus
This test can be used to check the status of the reserve battery for Volvo On Call/Volvo On Call Plus.

Resetting the reserve battery
This service is used when the reserve battery has been replaced to reset the value to 100%. If the reserve battery has been replaced in a phone module (PHM) with Volvo On Call/Volvo On Call Plus functionality, the algorithm of the battery must be reset.

Resetting the carphone code
This function is used to reset the carphone code to the original code when it has been changed.

Downloading Software and Replacing The Control Module
New software can be downloaded into the phone module (PHM). When ordering software, the hardware and the software in the car is compared to the data in the Volvo central database. If the comparison is OK the software is downloaded to the control module.

For phone modules (PHM) with Volvo On Call Plus functionality, the unique PIN code is supplied with the software. When replacing the phone module (PHM), the PIN code is retrieved from the Volvo Central Database. The PIN code is sent with the software package. A new phone module (PHM) has a generally known PIN code. This PIN code is used to unlock the control module so that functions can be programmed and parameters can be read out. VADIS/VIDA automatically unlocks the control module.

After software is downloaded, the parameters are sent to the Volvo central database. Information about changes to the customer data for Volvo On Call Plus is then sent from the Volvo central database to the web portal which manages data for Volvo On Call Plus. The data is also sent to the Volvo On Call Plus Service Center via ftp (File Transfer Protocol).

The following functions and data are programmed via a software download:
- The car VIN number
- The unique PIN code.

The following parameters are read off and transmitted to the Volvo central database:
- The ESN (Electronic Serial Number) of the AMPS unit
- The unique PIN code
- The version number of the software for the AMPS unit
- The type of unit.

If the comparison between the car and Volvo central database does not match, the database is updated with the relevant configuration. When this is complete the software and PINs are downloaded.

After downloading the software, the GPS receiver will search for GPS satellites for 20 minutes to determine the position of the car. During this time, the car must be parked outside with no large obstacles which could prevent the GPS receiver from establishing contact with the GPS satellites obscuring it. If the GPS receiver is unable to establish a position within the allocated time, the search for GPS satellites will stop. Volvo On Call Plus functionality switches to deactivated. After a GPS receiver has determined the position of the car, the ON CALL button must be held in for at least two seconds to connect a voice call to the Volvo On Call Plus Service Center. This call is made to confirm the new vehicle data and to check that Volvo On Call Plus is functioning correctly.

The phone module (PHM) is integrated in the keypad, which is beside the audio module (AUM) in the center console. If the phone module (PHM) is replaced, the keypad must also be replaced. Because of the unique PIN code and the Volvo On Call Plus subscription, the phone module (PHM) cannot be moved between cars.

If the phone module (PHM) is replaced, the customer's private and Volvo On Call subscriptions must be programmed. This is done using the carphone keypad. Instructions and codes for this are on the Volvo On Call Plus website. If necessary, for example if Volvo On Call Plus is being misused, the network operator is also able to cancel the subscription for the internal SIM card for Volvo On Call Plus. After the Volvo On Call Plus function has been activated, the procedures are the same as for when replacing the control module in terms of:
- searching for GPS satellites and
- connecting voice calls to the Volvo On Call Plus Service Center.

If the Volvo On Call Plus function is activated, a text message will indicate this to the user. The text message is displayed in the driver information module (DIM) at the start of each operating cycle (key position I).

If the customer so desires, the phone module (PHM) can be removed. The software package containing the car configuration file and PIN code must then be ordered. The PIN code is used to unlock the control module so that the Volvo On Call Plus function can be deactivated and the PIN code can be reset to the original general code.