Foreword
The multifunction screen is an ECU of the Comfort VAN network, which has the following functions
- Inform the driver on components exterior to the system (date, time, exterior temperature)
- Inform the driver on the system's interior components (autodiagnostic, trip computer)
- Control the radio and manage its display (*)
- Control the CD changer and manage its display (*)
- Control the navigation system and manage its display (*)
- Control the carphone and manage its display (*)
(*): (according to equipment)
There are three different multifunction screens (types "B", "CT" and "DT"), which manage the display of the various components and functions, according to the vehicle's trim level
The multifunction screen (EMF) has the functions of a Comfort network ECU. in effect, it collects information travelling through the multiplex network, manages the different priorities for actions on the peripheral components (notably the radio) and manages the display of these as well as the lighting. it also oversees the state of the adjustment buttons (for the time, language etc,) of the controls on the steering column(CSV), the trip computer button (ODB) and sends the corresponding messages
A telematic system has two components, CT or DT screen and a telematic unit
There are 3 levels of telematics
- Level 1: telematic unit with radio and telephone functions and a CT monochrome screen
- Level 2: telematic unit with radio, telephone and navigation functions and a CT monochrome screen
- Level 3: telematic unit with radio, telephone and colour navigation functions and a DT colour screen
Functions associated with the multi-function screen
Display of the following peripherals
- Hr
- Date
- Date and time display format
- Exterior temperature
- Audio system
- CD player
- Trip computer
- Telephone integegrated into the radio
- Parking assistance
- Status of the openers
- Vehicle alerts
Press management
Different press types allowing use of the screens
- Single press: on detection of the press
- Short press: on release of the button, before the timing of a long press
- Long press: above a time equal to t index L (see 2.3)
- Maintained press at the end of the time of a long press, the information is sent periodically every 200 ms while the button is depressed
Key
- "a": detection of a single press
- "b": short press T lower than or equal to t index L
- "c": long press T greater than or equal to t index L
Display selection function
Clarification of the alerts in the screen
As a function of the current situation, the requests for display of alerts and the alert priority criteria, the BSI chooses the alert to be shown on the screen at that time
The BSI simultaneously operates the audible warning in the COM 2000 if needed
Screen allocation
Each of the ECUS (BSI, REAR, NAV, CDC) makes available to the screen one or several streams of data to display
- BSI: additional BSI displays (status of doors and tailgate, trip computer function, vehicle lighting fault management)
- Rear: general radio state, particular radio state
- NAV: navigation date, navigation direction, navigation state, navigation position, search for navigation BDD
- CDC: CDC state
These datastreams are read by the screen according to its allocation strategy, but at least once per second for each datastream
Each device can send to the screen a stream of Eqt events, where Eqt designates the transmitting equipment. this datastream signifies that a change of content has occurred in one of the datastreams to be displayed. according to the context and the content of the datastream, the screen can accelerate or not the reading of the modified datastream
Back-up modes
In the event of a connection failure on the VAN comfort network, the current display can no longer be updated
If a connection problem appears between the BSI and the multifunction screen, the multifunction screen comes on (if it was off) and activates all its peripherals. the multifunction screen displays all the information still coming to it. the spaces reserved for other types of information remain blank
B multifunction screen
Description of equipment
"d": display zone
Display zone
The multifunction screen B shows information and messages in 3 different display modes (A, B and C)
| display mode | display zone | information and messages shown |
|---|---|---|
| A mode: nominal display | A1 | radio display |
| A2 | hr | |
| A3 | radio pictogrammes | |
| A4 | date, trip computer | |
| A5 | exterior temperature | |
| B mode: adjustment of the radio parameters | B1 | volume graph or radio graph |
| B2 | radio pictogrammes | |
| B3 | date, trip computer | |
| B4 | exterior temperature | |
| C mode: alerts, memory list, etc | C1 | alerts, memory list, PTY selection, setting, telephone, etc |
List of tempos
| parameter | mnemonic | duration |
|---|---|---|
| economy mode display time | t index E | 14 s |
| display time of alerts and information | t index A | 7 s |
| appearance time of miscellaneous information | t index l | 3,5 s |
| trip comp. long press time | trip comp t index | 2 s |
| long press time (audio) | t index L | 2 s |
| time delay before auto repeat (audio setting, CSV, etc) | mark index t | 600 ms |
| maximum CSV info transmission time delay | CSV index t | 10 ms |
| time delay before screen turns off | Key index t | 200 ms |
| auto repeat time | t index T | 150 ms |
On standby
The MF screen should, during this phase, memorise the current configuration (see table below)in order to reinstate them when restarting
The loss of data stored in the volatile memories arises from a cut in the +PERM
| MF screen data to save | type of memory in which it should memorise |
|---|---|
| traceability (DATA_TRAC) | non volatile memory |
| faults (DATA_FAULT) | non volatile memory |
| customer configuration (DATA_LANG_CLI) | volatile memory possibility |
| configuration (DATA_CONF_CDES) | non volatile memory |
| configuration (DATA_CONF_AFF) | volatile memory possibility |
| configuration (DATA_CONF_FONC) | non volatile memory |
| (DATA_TAB_LUM_RET) | non volatile memory |
| current audio source | volatile memory (obligatory reset to 0 on switching off the permanent +). by default source = tuner |
| radio state on switching off ignition | volatile memory (obligatory reset to 0 on switching off the permanent +). by default radio = off |
| day n°/year n° transmitted in the DATE_TIME stream | volatile memory (obligatory reset to 0 on switching off the permanent +) |
As described in the table above, the MF screen should memorise the displayed mode (active audio source, trip comp display, etc)
When ignition is switched on
| display zone | content of the corresponding zone |
|---|---|
| zone A1 | empty zone |
| zone A2 | hr |
| zone A3 | empty zone because the radio is OFF |
| zone A4 | date + telephone icon if the function is present |
| zone A5 | exterior temperature if configured |
| mode displayed before switching off | display in A1 zone | display in A4 zone | display in C1 zone |
|---|---|---|---|
| no peripheral operating. no trip comp display in A4 zone | empty zone | date | - |
| audio system (tuner, cass, CD). no trip comp display in A4 zone | audio system (tuner, cass, CD) | date | - |
| no peripheral operating. trip comp display in A4 zone | empty zone | last group of trip comp parameters | - |
| audio system (tuner, cass, CD). trip comp display in A4 zone | audio system (tuner, cass, CD) | last group of trip comp parameters | - |
| warnings | - | - | alert messages if faults still present |
NoteIf the key is on stop and the user puts the radio on, on switching on the ignition, regardless of mode displayed before switching off the ignition, the radio display will be the one displayed in the A zone
Power save mode
The purpose of this mode is to limit battery current consumption when the engine is stopped. it is activated by the BSI after 30 minutes of operation of the network, engine off
In this case, the message "ECONOMY MODE ACTIVE" is displayed in the C1 zone for t index E (see 2.3)
- While the network passes from nominal mode to economy mode (which for the MF screen corresponds to passing from the normal consumption mode to the reduced consumption mode on detection that the economy mode is active)
- On ending a diagnostic session
- At the first detection of the following conditions while economy mode is already active, such as: DONNEES_BSI_LENTES.ALIMS = 01 (accessories) condition +ACC true or; DONNEES_BSI_LENTES.ALIMS = 11 (ignition) condition +APC true
- On request to start the radio if the economy mode is active
In this latter case, the MF screen will send an order to the radio to deactivate this request and to stop the various other requests: radio, cassette, CD or telephone
The MF screen should prevent all intermittent displays while chang0ing to economy mode as well as while activating a peripheral, with economy mode active
Example: no intermittent display of tuner info before displaying the message ECONOMY MODE ACTIVE when the key is moved from off to +ACC
Special case: if a telephone call is in progress at the moment the network is changing to economy mode, the telephone function is retained in order to allow the user to finish his conversation. but the user is kept informed by the system displaying the message economy mode message in zone A for t index A (see 2.3)
If a call is received while the network is in economy mode, the telephone function is not authorised (if the radio telephone is not in operation, no call will be received or handled)
On the other hand, the activation of the telephone source is authorised in the following conditions
Display priority rules for the different screens
| priority order | types of screen |
|---|---|
| 1 | "economy mode active" message |
| 2 | telephone: incoming call |
| 3 (*) | screen results from a customer action |
| 3 (*) | warnings |
| 4 | context in progress |
(*): for the priority 3 screens, the arrival of an alert takes over a screen resulting from a customer action and vice versa
Example of a customer action (priority 3)
- Adjustment of the radio parameters
- Station search
- Change of source
- Etc.
WarningWhen two or more messages of the same priority level arrive, it is the last one that is displayed
CT telematic screen
The role of the CT screen is to inform users on the state of the following functions:
- Radio
- CD player
- Navigation
- Services
- Trip computer
- Vehicle alerts
- Configuration
- Etc.
It also manages its own contrast level thanks to an internal light sensor
The CT screen is in direct connection with the RT3 telematic unit across a CAN link. it is not in relation with any other component of the vehicle
Description of equipment
Key
- "e": display zone
- "f": internal light sensor
Display zone
The CT multifunction screen presents the information and messages following 7 possible display zones (Z0 to Z6)
Key
- "g": input field 1
- "h": input field 2
- "j": 1 button
- "k": 2 button
- "l": 1 button
- "m": 2 button
- "n": item selected
- "o": item 1
- "p": item 2
- "q": item 3
- "r": symbol
| display mode | display zone | information and messages shown |
|---|---|---|
| the zone Z6 does not deal with any operation of the control keypad. it cannot be closed. all the other zones are superimposed without affecting its operation | Z6 | background of the permanent screen. analogue clock compass (guidance not active). guidance advice (guidance active) |
| the zone Z0 deals with keypad commands which allow, for example, the opening of contextual menus | Z0 | AUDIO or DATE application. NAVIGATION application. trip comp application. TELEPHONE application |
| the zones Z1 (timed to 30 seconds) allows the input of information by the user. they are made up of different input fields and buttons as needed | Z1 | the keyboard allocation when a Z1 zone is present is the following: ESC short, ESC long, MENU short, MENU long, THUMBWHEEL, VALID |
| it allows the complete display of applications which are not memorised as current application, to display various messages and to effect displays which are not present in the Z0 zone. this zone contains no check | Z2 | the keyboard allocation when a Z2 zone is present is the following: ESC short, ESC long, MENU short, MENU long |
| Z3a: display zone. Z3b: dialogue zone. the zones Z3 carry priority single displays or dialogues associated with buttons actioned by the control keypad. this zone Z3 is timed (the controlled time T is defined for each zone when described by its applications). 1 priority: telephone (entry call, SMS reception, etc.). 2 priority: input (input of PIN, PUK codes etc.). 3 priority: dialogue (information or error messages) | Z3 | the keyboard allocation when a Z3 zone is present is the following: ESC short, ESC long, MENU short, MENU long, THUMBWHEEL, VALID |
| Z4a: scrolling list. Z4b: menu. Z4c: contextual menu. the Z4 zone allows the presentation of data in the form of a menu, a contextual menu and a list. it is timed and its value is fixed at 30 seconds | Z4 | the keyboard allocation when a Z4 zone is present is the following: ESC short, ESC long, MENU short, MENU long, THUMBWHEEL, VALID |
| the Z5 zone is made up of four sub zones: Z5a, Z5b, Z5c and Z5e situated at the top of the screen. in the event of several applications requesting display in zone Z5b, the priority rules are applied. 1 priority: telephone. 2 priority: radio (mute, TA, frequency, etc.). 3 priority: date. 4 priority: none (empty Z5b). the application with highest priority has potentially the display at Z5b | Z5a | hr |
| Z5b | display restricted by order of priority | |
| Z5c | exterior temperature | |
| Z5e | telephone status |
General zone cohabitation rules
(see general cohabitation rules for the DT screen zones)
Management of display mode
Three display modes are possible
Normal mode, nominal screen function, all the zones can be displayed. the display returns to this mode from the other two modes after each user action on the keypad (except the "volume" wheel) and cyclically with the "dark" button (see keypad). pressing one of the buttons of the control keypad causes a return to normal mode. a press on one of the COM 2000 controls acting on the RT3 (except volume controls) causes a return to normal mode
The reduced lighting mode (first press on the "dark" button). the display contains only zone Z5, the rest of screen is black. zones Z2 and Z3 can be displayed
"black panel" mode (second press on the "dark" button). the entire screen is black (black light off), no zone can be displayed in this mode
List of tempos
| parameter | mnemonic | duration |
|---|---|---|
| economy mode display time | t index E | 14 s |
| display time of alerts and information | t index A | 7 s |
| appearance time of miscellaneous information | t index l | 3,5 s |
| trip comp. long press time | trip comp t index | 2 s |
| long press time (audio, NAV button) | t index L | 2 s |
| time delay before auto repeat (input address, adjust audio, radio control, etc.) | mark index t | 600 ms |
| maximum CSV info transmission time delay | CSV index t | 10 ms |
| time delay before screen turns off | Key index t | 200 ms |
| auto repeat time | t index T | 150 ms |
| minimum display time for interrogation screens (NO/YES) | T index int-min | 5 s |
| maximum display time for interrogation screens (NO/YES) | T index int-max | 30 s |
DT telematic screen
The role of the DT screen is to inform the user on the state of the following functions:
- Radio
- CD player
- Navigation
- Services
- Trip computer
- Vehicle alerts
- Configuration
- Etc.
It also manages its own contrast level thanks to an internal light sensor
The DT screen is in direct contact with the telematic unit across a fibre optic link. it is also connects via the external video inputs with a video player or a RV tuner for example. the screen consists of 3 modules: an LCD screen, a graphics card and a light sensor
Display zones
Z2E: zone Z2 extended
| display mode | display zone | information and messages shown |
|---|---|---|
| the zone Z6 does not deal with any operation of the control keypad. it cannot be closed. all the other zones are superimposed without affecting its operation | Z6 | background of the permanent screen. analogue clock compass (guidance not active). guidance advice (guidance active) |
| the Z0 zone can be displayed in a window or full screen. when zone Z0 occupies the whole screen, the display, dedicated to the map or video. the zone Z0 deals with keypad commands which allow, for example, the opening of contextual menus. the Z0 zone is the zone at the base of the display it cannot be closed | Z0 | the Z0 zone is dedicated to the active application. the applications that have their complete displays in the Z0 window zone are. AUDIO or DATE application. MAP application. trip comp application. TELEPHONE application |
| the zones Z1 (timed to 30 seconds) allows the input of information by the user. they are made up of different input fields and buttons as needed. the Z1 zone opens superimposed on a Z0-Z6 zone, a Z4 zone or another Z1 zone. the size of the Z1 zone is variable (height and width), depending on the number of graphic objects present in this zone. this zone is centred on the screen | Z1 | the keyboard allocation when a Z1 zone is present is the following: ESC short, ESC long, MENU short, MENU long, THUMBWHEEL, VALID |
| the Z2 zone is a timed display zone (the controlled time T is defined for each zone when described by its applications). the extended Z2 zone is a Z2 zone centred on the screen in which is found memorised information. it is used essentially for the radio when choosing memory (autostore) and PTY selection. the Z2a zone is used for complete displays or messages for and from the applications | Z2 | the keyboard allocation when a Z2 zone is present is the following: ESC short, ESC long, MENU short, MENU long. radio or telephone. telephone (communication in progress). navigation (press of the button). trip computer. air conditioning, map, etc. |
| zone Z2 extended | ||
| Z2a | ||
| the Z2b zone is centred on the screen. it is used for varied information | Z2b | BSI alerts. ice warning. navigation system warnings. radio-text messages. Audio adjustments (bass, fader etc.) |
| the zones Z3 carry priority single displays or dialogues associated with buttons actioned by the control keypad. this zone Z3 is timed (the controlled time T is defined for each zone when described by its applications). in the event of several applications requesting display in zone Z3, the priority rules are applied (the 0 level is the highest priority). 1 priority: telephone (entry call, SMS reception, etc.). 2 priority: input (input of PIN, PUK codes etc.). 3 priority: dialogue (information or error messages) | Z3 | the keyboard allocation when a Z3 zone is present is the following: ESC short, ESC long, MENU short, MENU long, THUMBWHEEL, VALID |
| the Z4 zone allows the presentation of data in the form of a menu, a sub menu, a contextual menu and a list. the lists are in Z4 zone full screen, this zone has a fixed size. the menus and the contextual menus are in windowed Z4 zone, the size of this zone varies according to the number of items presented in the menus. this size varies in height and width. the Z4 zone is timed and its value is fixed at 30 seconds | Z4 | the keyboard allocation when a Z4 zone is present is the following: ESC short, ESC long, MENU short, MENU long, THUMBWHEEL, VALID |
| the Z5 zone is made up of four sub zones: Z5a, Z5b, Z5c and Z5e situated at the top of the screen. in the event of several applications requesting display in zone Z5b, the priority rules are applied. 1 priority: telephone. 2 priority: radio (mute, TA, frequency, etc.). 3 priority: date. 4 priority: none (empty Z5b). the application with highest priority has potentially the display at Z5b | Z5a | hr |
| Z5b | Z5b central zone (restricted display) | |
| Z5c | exterior temperature | |
| Z5e | telephone status (returns and reception level) |
NoteFor the "map" and "video" applications displayed in Z0 full screen the Z5b and Z5e zones disappear and the complete band only appears in the case where during a telephone call, the Z2a zone serving to display information on the communication disappears(covered by another zone) or cannot appear
General zone cohabitation rules
The following table gives the general strategy for superimposing zones as a function of the zone present on the screen and the new zone to display
This table is common to the two screens, there are cases that cannot occur, these cases are identified by greyed boxes. for example a Z2 zone (CT screen) can not appear in zones Z2a, Z2b and Z2 extended (DT screen)
| zone of appearance | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| present zone | Z6 | Z0 | Z1 | Z2 | Z2a | Z2b | zone Z2 extended | Z3 | Z4 |
| Z6 | - | S | S | S | S | S | S | S | S |
| Z0 | - | E | S | S | S | S | S | S | S |
| Z1 | - | - | E | - | - | - | - | E | E |
| Z2 | - | - | E | E | . - | . - | . - | E | E |
| Z2a | - | - | E | . - | E | E | E | E | E |
| Z2b | - | - | E | . - | E | E | E | E | E |
| zone Z2 extended | - | - | E | . - | E | E | E | E | E |
| Z3 | - | - | - | - | - | - | - | S | - |
| Z4 | - | - | S | - | - | - | - | S | S |
Key
- E: crushing
- S: superimposition to the present zone (possibility to return to this zone using the ESC button for example)
- -: impossible configuration
When a superimposed zone (Z1 to Z4) is displayed, the rest of the screen is greyed, except for the Z5 zone for the DT screen
Management of display mode
Three display modes are possible
Normal mode, nominal screen function, all the zones can be displayed. the display returns to this mode from the other two modes after each user action on the keypad (except the "volume" wheel) and cyclically with the "dark" button (see keypad). pressing one of the buttons of the control keypad causes a return to normal mode. a press on one of the COM 2000 controls acting on the RT3 (except volume controls) causes a return to normal mode
The reduced lighting mode (first press on the "dark" button). the display contains only zone Z5, the rest of screen is black. zones Z2 and Z3 can be displayed
"black panel" mode (second press on the "dark" button). the entire screen is black (black light off), no zone can be displayed in this mode
Display rules for an information group
Displays following only the zone cohabitation rules
| type | |||||||
|---|---|---|---|---|---|---|---|
| display zone | message | extended message | warning | dialogue | input | selection | background |
| Z1 | - | - | - | - | X | - | - |
| Z2 | X | X | X | - | - | - | - |
| Z2a | X | - | - | - | - | - | - |
| Z2b | - | - | X | - | - | - | - |
| zone 2 extended | - | X | - | - | - | - | - |
| Z3 | - | - | - | X | - | - | - |
| Z4 | - | - | - | - | - | X | - |
| Z6 | - | - | - | - | - | - | X |