REPLACING THE CONTROL MODULE Volvo C30 I

REPLACING THE CONTROL MODULE

The multimedia module (MMM) is mounted in the glove compartment.

The Multimedia module (MMM) is preloaded with application software and map information.

When replacing the Multimedia module (MMM), software must also be downloaded via Volvo's central database to be able to write the new serial number to the Central electronic module (CEM).

After replacement of the multimedia module (MMM), the infotainment control module (ICM) checks its unique serial number. If the serial number is incorrect, the multimedia module (MMM) will not work. If the problem remains after software download, try switching the ignition off/on.

The DVD player is used to transfer map information to the hard disk. The map information on the hard disk is used to navigate. The Multimedia module (MMM) has several user functions, such as

1. route guidance, i. e. guidance to a specific target (address, a specific hotel etc.)
2. show map
3. find a hotel, a car park, a shopping mall, in the surroundings or in the vicinity of a specific place
4. show TMC information, i. e. traffic information (traffic jams, closed roads etc.)
5. show remaining mileage and estimated journey time to selected destination.
6. system settings for navigation

The start menu allows the user to choose whether the system is to start in a Beginner or Advanced user setting. In the Beginner user setting, only the most important functions are available and are intended for beginners. All functions are available in the advanced user setting

The navigation menu and quick menu display, on the monitor, all the functions that are available for the user to use.

Certain functions can be configured by the user in system settings. These functions are

1. type of route guidance (fastest route, shortest route or easiest route)
2. avoid ferries, toll roads etc or not
3. volume voice guidance
4. language.

Scheme 1322

The on-screen menu can be controlled using the navigation buttons on the reverse of the steering wheel (16/46).

The buttons consist of

1. an enter button
2. a back button
3. a control button that can move the marker on the screen up, down, left and right.

The commands are transmitted from the Steering wheel module (SWM) (3/254) via CAN to the Central electronic module (CEM) (4/56) and on to the Infotainment control module (ICM) (16/1.2) on the CAN network. The Steering wheel module (SWM) converts the electrical signal to an optical signal and sends it on to the multimedia module (MMM) (16/108) via the MOST network.

The remote control for the Multimedia module (MMM) has the same functions as the steering wheel buttons.

Scheme 1323

The navigation section in the Multimedia module (MMM) (16/108) calculates the vehicle's position from the information from

1. GPS antenna (16/47)
2. wheel rotation counter
3. the gyro in the multimedia module (MMM)
4. reverse gear status
5. map matching function.

Information from other nodes that is used for navigation

1. wheel rotation counter from the brake control module (BCM) (4/16)
2. reverse gear status from the transmission control module (TCM) (4/28) and central electronic module (CEM) (4/56).

Information from these control modules is sent to the infotainment control module (ICM) (16/1.2) which then distributes the information to the multimedia module (MMM).

Information from the gyro and the wheel rotation counter is used to achieve better precision than the GPS position from the GPS antenna can give, and is used for dead reckoning, i. e. to calculate the position when communication is lost with the GPs satellites. This occurs when in a tunnel, for example.

The navigation function indicates current position and how to get to the specified destination. There is also voice guidance, which tells the driver which way to drive to get to the specified destination.

The navigation buttons on the steering wheel module (SWM) (3/254) are used to control the on-screen menu for navigation.

Two signals are sent via the high speed side of the CAN network to the central electronic module (CEM)

1. information from the wheel rotation counter is sent from the brake control module (BCM)
2. information on reverse gear status is sent from the transmission control module (TCM)

The central electronic module (CEM) transmits both signals to the infotainment control module (ICM) via the low speed side of the Controller area network (CAN). In turn, it sends the signals on the MOST network to the Multimedia module (MMM).

Information for voice guidance to the selected destination is sent between the multimedia module (MMM) and integrated audio module (IAM) (16/1) via the MOST network.

In order for the Multimedia module (MMM) to select a route and display the position of the car, the map information must be on the hard disk. The Multimedia module (MMM) calculates the position and displays it on the directly connected screen. If the map information has been updated, the DVD must be left in the DVD player, otherwise the map information will not be displayed.

Scheme 1324

The multimedia module (MMM) (16/108) receives GPS signals from the GPS antenna (16/47) to the integrated GPS unit for position determination.

The information about the vehicle's position is continuously transmitted from the Multimedia module (MMM) via the MOST network to the Phone module (PHM) (16/60) for the Volvo On Call function.

A telephone number can also be sent from the Multimedia module (MMM) via the MOST network to the Phone module (PHM), to make a call to a hotel for example.

Scheme 1325

The multimedia module (MMM) (16/108) receives traffic information messages (TMC) via the TMC receiver. The signal is transmitted via the antenna amplifier (16/16). Traffic information messages (TMC) are displayed on the display screen (16/46).

TMC is a standardized code system for traffic bulletins, such as information on road construction.

The information is displayed on the monitor and is also used by the navigation function during guidance, to avoid closed roads and navigate around queues if possible (dynamic route guidance).

The multimedia module (MMM) is an optional module. Its most important task is handling the functions for

1. navigation
2. TMC
3. GPS
4. RGB output for the screen
5. The DVD-player for updating map information and software.

The GPS-unit and TMC-receiver are integrated in the Multimedia module (MMM).

The screen is directly connected to the Multimedia module (MMM).

Multimedia module (MMM) has a hard drive where the map information is stored.

The DVD-player is integrated in Multimedia module (MMM) and is used to update map information and software.

Other functions come from the control modules on the MOST network, but are managed using the Multimedia module (MMM). The system cannot handle CDs or DVDs containing music or films.

The multimedia module (MMM) communicates with other control modules via the MOST network.

The control module checks internal components, executed activations and input/output signals via its integrated diagnostics. If the control module detects a fault, a diagnostic trouble code is generated. Any diagnostic trouble codes are stored in the control module memory. The information can be read via the data link connector in the vehicle.

In order to work in the MOST network, the infotainment control module (ICM) checks that the central electronic module (CEM) has the correct serial number for the multimedia module (MMM). If the number is incorrect, the multimedia module (MMM) will not be operable. If a problem arises upon control module replacement, try switching the ignition off/on.

A simple way to check that the Multimedia module (MMM) is supplied with power is to insert and eject a DVD. The check requires the ignition to be in ignition position II. If this does not work, first check that the unit is powered and grounded.

The multimedia module (MMM) is located in the glove compartment.

For further information, see SIGNALS .

The table below summarizes the input signals to and output signals from the multimedia module (MMM). The signal types are divided into directly connected signals and MOST communication. The illustration below depicts the same information with the Volvo component designations.

Scheme 1326

The Multimedia module (MMM) has a hard disk and a DVD player integrated in the control module. The DVD player is used to upgrade the software in the Multimedia module (MMM) and transfer map information from the DVD to the hard disk. Using the hard disk obtains the map information quicker and makes storing more data possible. The map information is used for navigation.

The Multimedia module (MMM) has an integrated gyro that manages information about the vehicle's direction of travel.

The multimedia module (MMM) as inputs and outputs for

1. power supply
2. ground
3. GPS
4. TMC
5. RGB output to the screen
6. MOST network

GPS

Information to the GPS unit consists of signals received from GPS satellites via the GPS antenna.

The navigation system requires at least three satellites to be able to calculate the vehicle's position.

Power is supplied to the GPS unit from the multimedia module (MMM). The GPS unit is integrated in the multimedia module (MMM).

Note. If the GPS signal is diagnosed as missing, the signal should be checked outdoors in an open area as the signal could be blocked if the vehicle is indoors and surrounding buildings could interfere with reception of GPS signals. It can take up to 12 minutes until the GPS signal has been captured and the position has been determined.

TMC

The TMC signal is transmitted from the antenna amplifier and received by the TMC receiver. The TMC signal is managed in the Multimedia module (MMM) and the information is then presented on the display screen.

The TMC receiver is integrated in the multimedia module (MMM).

TMC is a standardized code system for traffic bulletins, such as information on road construction. TMC is only available on certain markets.