Audio System Land Rover Range Rover L322

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General

Range Rover models up to 2005 MY have two distinct types of audio system. One system is based around the Multi Information Display (MID) while the other is based around the Multi-Function Display (MFD).

It is also possible to specify extras to the audio system to extend its capabilities. These options include

1. Telephone
2. CD autochanger
3. Amplifier
4. Digital signal processor (DSP)
5. Satellite navigation (MFD only)
6. Television / Teletext (MFD only)
7. Voice recognition system (navigation and telephone).

As stated the low line audio system is based around the Multi Information Display unit. The system comprises

1. MID unit
2. Cassette unit, mini disc unit or CD unit
3. CD auto changer (optional)
4. Radio unit
5. Telephone (optional)
6. Digital signal processor (DSP-optional)
7. Speakers
8. Amplifier (optional).

All the low line systems use the MID unit as a control panel for the whole system. The MID is located in the center of the fascia. The MID unit incorporates a two line LCD display with controls that allow the user to control the radio, cassette player, CD player/auto changer, trip computer, telephone and amplifier (DSP). Depending upon the customers selection of options the MID has four different front panels to allow for control of the different options. These are as follows

Scheme 11

1. DSP and Phone
2. Phone No DSP
3. DSP No Phone
4. No DSP No Phone.

Six rocker buttons are located below the MID. Each rocker button has a pressure point on the left and the right. There are effectively 12 switching levels for this button unit. Arranged to the right next to the display are the buttons for the selection of AUDIO, DSP, TELEPHONE, CLOCK and BC (on-board computer). The AUDIO button has one pressure point each on the left and right. In the case of versions with DSP, the left pressure point is assigned to AUDIO and the right to DSP. The buttons for TELEPHONE with the handset symbol and BC with the CLOCK are laid out as rocker buttons. To the left next to the display is a rocker button for the search and scan functions. The button for the manual search function is inserted in the center of this rocker button. A rotary increment sensor is used to control AUDIO and the hands-free speaking feature of the telephone volume, as well as the ON / OFF switch for the AUDIO system. This is carried out by means of an increment sensor with an integrated push switch. The rotary controller has 36 incremental steps of 10° each.

The MID lighting is controlled by a photo-transistor sensor. The brightness of the lighting can also be influenced manually by the instrument lighting dimmer. When the vehicle lighting is switched off, the display brightness is governed exclusively via the sensor, this gives a daytime minimum brightness of 60 % of the control range is defined. When the instrument dimmer is switched on, the controlling range from the daytime minimum brightness onward is expanded by the dimension of the dimmer position. The dimmer position is taken from the "dimming" message. With "light off" the LED function indications are activated at the maximum level and with "light on" with the value of the day/night threshold, irrespective of the photo-transistor.

Control signals for the MID are sent along the I-bus.

MID Harness Connector C0241 Pin Details

MID Harness Connector C0241 Pin Details

Diagnostics

The MID is capable of being subjected to diagnostics. The principle applies of finding the smallest replaceable unit via the diagnostics computer (T4). The instrument pack serves as a gateway between the diagnostics bus and the I-bus. The messages from T4 are converted by the instrument pack into the respective I-bus format. The MID detects the diagnostics mode by means of the diagnostics computer address. Normal operation is maintained during the diagnostics mode. MID diagnostics are subdivided into two categories

1. Device identification
2. Self-diagnostics with error storage.

Control unit identification is stored in the EEPROM of the MID and can be called up by means of the diagnostics tester. The data is programmed at the point of manufacturer.

Errors detected by the MID are stored in the EEPROM. The errors are stored in the order of their occurrence. Each error is assigned an error code. In order to avoid the entry of "false errors", the error memory is not written to in the first 500 ms after the power-on reset. The frequency counter is incremented with each detected error. The error type is set to "momentarily present". After the error is corrected, the error type is set to "sporadic (not momentarily present)". The error frequency counter stores a maximum of 31 errors. Once this limit is reached, the error type remains constantly on "momentarily present". Any fault codes can only be removed by the manufacturer.

The High Line audio option comprises

1. MFD head unit
2. Radio unit
3. Speakers
4. Amplifier.

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The MFD forms the basis of the high line audio system. It communicates with the rest of the audio system on the I/K-Bus. The Multi-Function Display controls all the radio, CD changer (optional) and cassette functions. The cassette unit is located behind the display panel and is accessed by pressing the "tape eject button". This causes the screen to move down and tilt slightly forward to reveal the cassette slot and eject the cassette. There is no option for a single slot CD player with the Multi-Function Display audio system. All other components of the audio system are the same as the low line system.

Diagnostics for the MFD are described in NAVIGATION SYSTEM .

MFD Harness Connector C0815 Pin Details

MFD Harness Connector C0815 Pin Details

MFD Harness Connector C0816 Pin Details

MFD Harness Connector C0816 Pin Details

Common Components

Both systems share some common components, these are detailed bellow.

Radio Module

The radio unit for the 'Low' system is located in the cassette, CD or Mini disc player unit. The radio unit for the 'High' line audio system is separate from the head unit and is located in the left hand side of the luggage compartment.

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Both radio systems offer the option of Business units or Professional. Both units offer six preset buttons allowing the presetting of 6 radio stations on FM, 6 radio stations on MW and 6 Radio stations on LW to the preset buttons on the Multi-Function Display. The "Business" system provides standard AM/FM tuner capabilities (RDS Traffic information Etc.) while the "professional" system has two separate tuners built in to give improved radio reception through diversity tuning. This involves one of the tuners providing the selected program while the other tuner continuously searches for a stronger signal for the selected broadcast station and for other RDS stations that can be received.

Radio Module Harness Connector C0818 Pin Details

Radio Module Harness Connector C0818 Pin Details

Radio Module Harness Connector C0991 Pin Details

Radio Module Harness Connector C0991 Pin Details

Radio Module Harness Connector C1912 Pin Details

Radio Module Harness Connector C1912 Pin Details

The "RDS radio" system uses the heated rear screen element as the radio antenna. The signal is processed by an amplifier before being passed through to the head unit. This antenna and amplifier is also used receive and process signals from the remote handset to lock/unlock and arm/disarm the alarm. Because of this there are two types of amplifier to accommodate the different frequencies used with the remote in different markets. This standard amplifier is located in the tailgate at the top left hand corner.

The "RDS Hi Fi" system uses a second antenna fitted in the left hand window of the luggage compartment to achieve the diversity function. The amplifier for this antenna is located in the left hand side of the luggage compartment behind the trim panel near the wheel arch.

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Both systems are capable of controlling a six disc CD autochanger. The autochanger is controlled on the I/K Bus and is located at the rear of the passenger compartment glove box.

CD Autochanger Harness Connector C0941 Pin Details

CD Autochanger Harness Connector C0941 Pin Details

CD Autochanger Harness Connector C1353 Pin Details

CD Autochanger Harness Connector C1353 Pin Details

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The basic audio system has no amplifier. The system drives two speakers, one in each rear door, and two speakers (one woofer and one tweeter) in each of the front doors.

The "Hi Fi" system has a conventional power amplifier located in the left hand side of the luggage compartment. The amplifier drives two speakers in each of the rear doors, three speakers in each of the front doors and a center speaker connected across the two front mid-range speakers.

Amplifier Harness Connector C2077 Pin Details

Amplifier Harness Connector C2077 Pin Details

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The top "Hi Fi" option has a digital signal processor (DSP) amplifier which is located in the left hand side of the luggage compartment. It drives two speakers in each of the rear doors, three speakers in each of the front doors, a center speaker connected across the two front mid-range speakers and two dual voice-coil subwoofers in the luggage compartment. It can also use digital signal processing techniques to simulate a Concert Hall, a Jazz Club, a Cathedral or one of three user defined settings. These functions are controlled from the Multi-Function Display via the DSP option.

DSP Harness Connector C0491 Pin Details

DSP Harness Connector C0491 Pin Details

DSP Harness Connector C0492 Pin Details

DSP Harness Connector C0492 Pin Details

DSP Harness Connector C0493 Pin Details

DSP Harness Connector C0493 Pin Details

Logic7

The Logic7 audio system provides surround sound capabilities to the Range Rover audio system.

The system comprises

1. Logic7 amplifier
2. Auxiliary amplifier
3. Harmon Kardon replacement speakers
4. Two new speakers located in the upper tail gate

The Logic7 amplifier drives the following speakers

1. Right and left surround sound speakers
2. Right and left rear door low range speakers
3. Right and left rear door tweeters
4. The front center fill speaker

The Logic7 amplifier is located in the rear left hand corner of the luggage compartment. The auxiliary amplifier is mounted on the side of the subwoofer. Audio from the radio, cassette and CD player is routed to the Logic7 amplifier, which passes on the correct channels to the auxiliary amplifier and speakers.

The auxiliary amplifier drives the following speakers

1. Right and left front low range
2. Right and left front mid range
3. Right and left front tweeters
4. The subwoofer

Logic7 Harness Connector C2414 Pin Details

Logic7 Harness Connector C2414 Pin Details

Logic7 Harness Connector C2415 Pin Details

Logic7 Harness Connector C2415 Pin Details

Logic7 Harness Connector C2416 Pin Details

Logic7 Harness Connector C2416 Pin Details

MID Audio Operation

All of the functions of the MID Audio are controlled by the switches around the MID unit. Additional control is available in the form of steering wheel mounted switches to alter the volume, change pre-set radio station, fast forward tape or CD tracks.

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Radio Operation

The radio is accessed by pressing the rotary controller on the MID. The radio can be tuned by pressing the arrow buttons on the left of the MID (right arrow tunes up the scale left tunes down the scale). The 'M' button in the middle of the arrow keys saves the tuned station to a memory.

Cassette Operation

The cassette is operated by inserting the tape into the tape slot. Once in the tape will start to play. The cassette player is an auto-reverse tape player and will continue to play the tape from one side to the next until the tape is ejected or the mode has changed to radio or CD player. To access a tape that is already in the cassette player from the radio or CD autochanger press the button marked "Mode" on the far right hand side of the MID.

Functions that are available while in the cassette mode are

1. Side
2. Dolby
3. SC
4. Mode.

Using the side option changes the tape from the current side being played to the other side of the tape.

Pressing the SC option changes the display to SC*, this activates the intro scan function. The cassette player will play the introduction 10 seconds of each track on the tape. When the desired track is reached pressing this button again will stop scanning the intros and start playing the tape from that point.

The cassette player also has the option to switch Dolby™ noise reduction from Dolby C to B or off by toggling the switch labelled with Dolby in the MID.

The other functions (radio and CD player) are accessed by pressing the "Mode" button.

Mini Disc Operation

Once the Mini Disc (MD) is in the player, press the mode button to access the MD mode. The MID will display the track number and the time. There is a slight delay between starting the player and the audio beginning as the player has to read the audio data from the disc.

It is also possible to search for a specific track by pressing the direction key. A single press will advance the disc on a track. Holding the button in fast forwards/rewinds through the current track. Releasing the key resumes playing the track from that point.

The MD player has two special functions it can perform

1. Track scan function
2. Random play function

The scan function allows the user to listen to the first few seconds of all the tracks on the disc. The scan function is accessed by pressing the button on the MID marked SC. An asterix will display next to the SC symbol to denote that it is switched on. Once on the player will access each track in turn and play the first ten seconds then move on to the next. To interrupt this and play a selected track the user must press the SC button again.

The Random play function allows the user to play the contents of the MD in a completely random order. This is achieved by press the button on the MID marked RND. Again an asterix will appear next to the RND in the MID to denote that this function is active. Tracks can be searched for using the direction keys but selection will not be sequential, it will follow the random order in the units memory. De-selection of the random mode is achieved by pressing the RND button again.

Compact Disc (CD) Player Operation

With a CD in the player, press the mode button to access the CD mode. The MID will display the track number (01) and the time.

To search for a specific track, press the direction key forwards or backwards. A single press will advance the disc on a track.

The CD player has two special functions it can perform

1. Track scan function
2. Random play function.

The scan function allows the user to listen to the first few seconds of all the tracks on the disc. The scan function is accessed by pressing the button on the MID marked SC. An asterix will display next to the SC symbol to denote that it is switched on. Once on the player will access each track in turn and play the first ten seconds then move on to the next. To interrupt this and play a selected track the user must press the SC button again.

The Random play function allows the user to play the contents of the CD in a completely random order. This is achieved by pressing the button on the MID marked RND. Again an asterix will appear next to the RND in the MID to denote that this function is active. Tracks can be searched for using the direction keys but selection will not be sequential, it will follow the random order in the units memory. De-selection of the random mode is achieved by pressing the RND button again.

MID Function Tests

The MID offers an integrated function test for workshop testing purposes. The test menu is called up by simultaneously pressing the first and the last menu button while switching on the ignition. This menu is generated by the MID itself, and the tests are carried out by the MID. The display is disabled for the testing period, even in the event of a display request. The test is also possible without the I/K BUS connected.

The following are offered in the test menu (selection carried out via the MID rocker buttons)

1. DISPLAY: Display test
2. KEYS: Button functions
3. VOLUME: Increment sensor test
4. LEDS: for LED function displays.

The test is concluded by switching the ignition off or after a time out of 5 seconds has elapsed after the last button actuation.

Display Test

The following are activated in succession on a 3 second cycle

1. All characters with all DOTs
2. All characters with number symbol pattern
3. All characters with "Z" pattern
4. All special text labels: LIMIT, LIMITE, MEMO, STOPPUHR, All special text labels together.

LED Function Test

The LEDs are activated in succession on a 3 second cycle

1. Main line light chamber off
2. Menu line light chamber off
3. TELEPHONE LED red
4. TELEPHONE LED yellow
5. TELEPHONE LED green
6. Heating/ventilation symbol LED.

After the end of the test sequence, the test menu appears once again.

Button Function

The principle of the test lies in visual feedback to the pressing of a button. The menu buttons, selection buttons, the search rocker button and the AUDIO on/off button are tested. The number of the button pressed is displayed in the main display as a reaction. When calling up the test, the menu line is erased and the character "_" is displayed in the main line.

Exiting back to the test menu takes place by means of the time out of 5 seconds after the last button actuation or ignition off.

Increment Sensor Test (Volume)

As in the case of the test for the button function, visual feedback takes place with each sensor increment.

Shown in the main display is a two-character counter beginning with the dual character "_ _". With each increment to the right, the value increases by one up to a maximum of 36, which corresponds to one revolution. If rotation is carried out to the left, the value decreases by one.

The test is concluded by calling up a new test from the test menu or through general exiting of the function test via the time out or switching the ignition off.

High Line Audio Operation

All of the functions of the High Line/Multi-Function Display are controlled from the Multi-Function Display. Additional controls are provided by steering wheel mounted switches and (where fitted) voice operated control.

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To access the radio functions of the MFD system turn the unit on by pressing the left-hand rotary control, a display appears on the monitor with the available options of the system. Using the rotary controller highlight the radio option and press. This will bring up the radio control screen.

1. Name of radio station
2. TP station (name of traffic program station selected in background)
3. MFD Waveband selected
4. P3 positions the radio station (if programmed into the memory)
5. RDS (Radio Data System) is switched on, station names are displayed and the strongest frequency on which the station can be picked up is searched for automatically
6. Date/time display
7. Radio screen display (showing radio stations that are available in the area)
8. Regional station function switched on.

If the radio is switched on and on-board computer functions appear on the monitor, the "Audio+OBC" function (on-board computer) is switched on. Switch off the function.

To change the waveband the "AM/FM" button must be pressed. Each time the button is pressed the waveband changes over as follows

1. FM/FMD = VHF (very high frequency)
2. AM = MW (medium wave)/SW (short wave)/LW (long wave).

Manual Station Selection

It is also possible to manually tune onto a radio station by name or frequency. This is achieved as follows.

1. Select the desired waveband
2. Press the selection button to obtain the selection menu
3. Turn right-hand rotary control until "m Manual station choice" is marked
4. Press the direction arrows to tune the radio until the desired station is displayed.

To tune to the next station, press the tune button in the desired direction (up/down) the next available station will be searched for. You can select in advance whether to jump to the next possible station or the next stored station, this is achieved by the following process

1. Press and hold in the "select key" until PRES ON or PRES OFF ("PRES" is short for PRE-SET) appears on the monitor
2. PRES ON: Jumps to the next memorized station PRES OFF: Jumps to the next station.

Automatic Search

It is also possible to search and sample the available radio stations. With an Automatic search (SCAN) Stations with a sufficiently strong signal are heard automatically for a short time, one after the other. This can be achieved as follows

1. Press the selection button to obtain the selection menu
2. Turn right-hand rotary control until "SCAN Station sample" is highlighted
3. Press the rotary controller to select this option and start the search
4. Pressing the "select" button stops the search at the tuned station.

It is also possible to search manually for stations and has two levels of sensitivity attached to it. These are

1. Search run for weaker stations
2. Search run for more powerful stations.

If no appropriate stations are found in the search, a second search run is made which includes the weaker stations.

The process for selecting this type of search is as follows

1. Turn right-hand rotary control until "II Search sensitive" is highlighted
2. Press to confirm your selection
3. Turn the right-hand rotary control until you hear the desired station.

It should be noted that if the inputs are not made within eight seconds, the procedure will have to be repeated.

Traffic Message Channel

The radio tunes itself in the background to the Traffic Message Channel (TMC) station with the strongest signal. This is turned on in the navigation system. If it is desired to have a particular TP station in the background TMC will have to be deactivated in the navigation system. If RDS-TMC has been activated in the navigation system, only TP stations that also broadcast TMC traffic information can be activated in the background.

Programming Pre-set Radio Stations

The MFD can memorize up to 24 radio stations: 6 FM and 18 AM stations. The AM reception band is subdivided into separate MW, SW and LW memory ranges, to permit greater flexibility in storing stations. The process for tuning in and storing a radio station to a preset memory is as follows

1. Select the waveband (FM, MW, SW and LW)
2. Select the station (search for the correct one as described)
3. Hold the desired memory key pressed in until the station is heard again after a brief interruption.

If the chosen location key is already occupied by a stored station, the station last stored is faded up briefly. If the key is released immediately, the process will be halted and the previously memorized station will not be lost. However if the key is held in the original tuned radio station will be lost and its place will be taken by the new radio station selection.

To access a preset station first ensure the waveband is correct (FM, MW, SW and LW) and then press the appropriate number key (1-6).

Regional Stations

On FM, certain stations may broadcast regional stations either all day or at certain times of day only. If it is desired to receive these stations, the regional function must be switched on as follows

1. Press the "info" button
2. Turn right-hand rotary control until "RDS" is highlighted
3. Turn until "Region On/Off" is highlighted
4. Press the rotary controller to activate/deactivate the regional function.

The phrase "REG" appears on the screen. If this function is selected this function and the transmitter switches to a regional station, this option will automatically be displayed on the monitor for selection.

Traffic Report Stations

It is possible to select a radio station with traffic reports and keep it in the background, so that it interrupts the radio station being listened to when a traffic report is broadcast. This is achieved as follows

1. Press the "info" button and hold in until "Selected TP station" is displayed
2. Turn right hand rotary controller until the desired traffic program station is highlighted
3. Press the right hand rotary controller to confirm your selection.

To cancel a background station

1. Press the "info" button and hold in until "Selected TP station" is displayed
2. Turn right hand rotary controller until "Delete TP-Stat" is displayed, push to select
3. Press the right hand rotary controller to confirm your selection.

The radio then broadcasts traffic reports even if the station you have selected does not do so. While traffic reports are being received, TV reception, radio reception, cassette and CD play are interrupted. The speech output of the navigation system, however, remains active.

To adjust the volume of a traffic report, turn the volume control to the desired level while a traffic report is being broadcast. This volume is then retained for traffic reports even when the volume has been changed for other audio sources.

To insert a cassette the eject button should be pressed, once pressed the front display panel will drop down to reveal the cassette slot. Once the tape is inserted it will begin to play automatically. If it is required to change from radio to cassette operation the mode change button should be pressed. The screen displays the Tape 1 or Tape 2, depending on which side of the tape was being played the last time cassette operation was accessed.

To fast forward or rewind the tape press the required direction key twice. Pressing one of the direction keys will cancel this operation and return to play mode.

To operate the track search function press the direction key once in the desired direction. The tape will advance until it reaches the next track where it will then commence playing. It should be noted that this function will only operate if there is at least a 4 second gap between tracks.

CD Autochanger Operation

The CD autochanger is located in the passenger compartment glove box. The autochanger is capable of holding 6 CDs which are loaded into a cartridge.

The CD player function is accessed by pressing the mode button until the display shows the CD screen. The screen will display the CD number and track number being played. The CD autochanger has several functions

1. Track search
2. Random play
3. Fast forward/reverse
4. Track scan.

Track search is achieved by pressing the direction arrow key as often as required to reach the desired track.

Random play plays all the track on all the CDs in a random order. This is selected by pressing the select key until the appropriate screen is visible, turning the rotary controller to highlight the Random button and selecting.

Fast forward/reverse is selected by pressing and holding the direction key in the desired direction or by highlighting the double arrow button in the display using the rotary controller and selecting by pressing the rotary controller.

The track scan function is accessed by turning the rotary controller until 'Track scan' button is highlighted and pressing the rotary controller to select. Press the track select key starts the search. The player will play the first 10 seconds of each track until it is stopped at the required track by pressing the track select key.

Television Operation

The Television image is displayed only up to a speed of 3 km/h (approx. 2 mph), the accompanying television audio can be heard while the car is being driven. Television operation is selected from the menu screen. Once selected the screen displays the television program last used or the last used selection and the following menu screen

1. Program
2. Search
3. Autostore
4. Set
5. Display
6. Teletext.

Program

Selecting program from the menu allows the user to scroll through the available stored memory locations.

Search

Selecting the search option allows the user to search for a television station and to store that station to a memory location. This is achieved by selecting the search option and scrolling through the channels with the rotary controller and pressing the rotary controller to select. This will then bring up the location store option, turn the rotary controller until the required location is shown and press the rotary controller once to store the station at that memory location.

Autostore

Autostore is a convenient method of storing ten television channels to the memory quickly. To achieve this first select the autostore option from the menu, by turning the right-hand rotary controller. Turn the right-hand rotary controller until "Autostore" is marked and select to start an automatic station search and store. The first 10 stations are stored in memory locations 21 - 30.

Set

The set option allows the user to adjust the following television option.

1. Contrast
2. Brightness
3. Color
4. TV format.

To adjust each one turn the right-hand rotary controller to select the option required and press to select. Then use the rotary controller to adjust the slider up or down on the screen. In the case of the TV format it is possible to change the country of use. Again using the right-hand rotary controller select the TV format option and select by pressing. Using the rotary controller scroll through the countries until the required country is found and select by pressing the rotary controller.

Display

The display menu allows the user to change the screen format to one of the following.

1. 16:9 widescreen mode (default setting)
2. 4:3 normal television screen size, this will produce black bands down each side of the screen
3. Zoom this allows non wide screen format transmissions to be viewed as full screen (without the black bands).

Teletext

The teletext mode allows the user to read teletext pages as on normal television. Using the right-hand rotary controller select teletext from the menu. Again the right-hand rotary controller scroll to the page number required and press select to view the page (the page may take a while to load). The zoom option allows the display to be zoomed to make reading the text easier. If it is required to keep the page viewed rather than let it scroll over to the next page the hold button can be pressed to hold the current page. Turning the rotary controller releases the page. Selecting the TV option returns the screen back to the television function.

Scheme 19

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Scheme 22

Scheme 23

Range Rover models from 2005 MY are equipped with a new audio system. Two levels of the system are available and both systems use the Touch Screen Display (TSD) as their interface. One system is based around a Harman/Kardon DSP audio amplifier while the other is based around the Harman/Kardon Logic7 audio amplifier. The audio system has no option for a single CD or a cassette tape player.

It is also possible to specify extras to the audio system to extend its capabilities. These options include

1. Telephone
2. Satellite navigation
3. Television / Teletext
4. Voice recognition system (navigation and telephone).
5. Rear Seat Entertainment (RSE)

MOST

The components of the complete audio/infotainment system are all connected on the Media Orientated Systems Transport (MOST) ring. The MOST ring is a fibre optic communications bus for multi media applications. Sound and control information is passed around the MOST ring and can be picked up by any of the systems units. For example, sound information is sent from the CD autochanger along the MOST ring and is collected by the audio amplifier which then out puts the sound to the speakers.

MOST technology uses a plastic optical fibre which forms a network connecting the audio and multimedia system components. Each component in the ring is connected to the plastic optical fibre through a device known as a Fibre Optical Transceiver (FOT). Each FOT has two optical connections; one connection is sensitive to light and is the input and the second connection forms the light source and is the output. The system operates by connecting the output from one FOT to the input of another FOT.

The light signals are sent in one direction only and are formed in the following way

1. Electrical signals are converted into an electrical current
2. The current then drives a Light Emitting Diode (LED) in the FOT to produce a high intensity red light
3. The LED transmits the light through a fibre optic cable
4. A photo diode in the FOT at the opposite end of the fibre optic cable detects the light.

The following components are connected to the MOST ring

1. Integrated Head Unit (IHU)
2. Touch Screen Display (TSD)
3. SDARS receiver
4. TV tuner
5. Traffic Message Channel (TMC) module
6. Amplifier
7. Rear seat entertainment module
8. Personal telephone integration module
9. CD autochanger.

The IHU is the timing master for the MOST system. The IHU controls and manages the MOST ring and the system components. It is also responsible for the MOST security system. Each component in the MOST ring has a unique serial number. The component serial number is stored in a registry file in the gateway module. If any component serial number is not recognised, the entire audio system will not function

A replaced component requires its serial number to programmed in the gateway module registry using T4. If the gateway module is replaced, the complete system will not function until the gateway module is programmed with the component serial numbers using T4.

MOST Diagnostics

A light box is used to diagnose the MOST system. The light box emits a visible, high intensity red light which can be connected into the ring at any point to test the ring integrity. The light box is used in conjunction with T4.

Disconnecting a MOST connector will reveal if the high intensity red light is visible. Do not view the red light directly. If a break occurs in the MOST ring fault codes are stored in the IHU which can be retrieved using T4.

Scheme 24

A gateway module is located behind the touch screen display. The gateway module is the link component between the vehicle bus systems and the audio system MOST ring. When the vehicle is unlocked, the gateway module receives a system 'wake-up' message on the CAN bus. This message is then passed on the CAN bus from the gateway module to the integrated head unit which then 'wakes-up' the MOST ring components by energizing the infotainment relay.

The gateway module is connected by a dedicated CAN bus directly to the diagnostic socket. This allows the infotainment system to interrogated for fault codes and diagnostics using T4.

System Security

The gateway module stores a unique serial number for each component in the infotainment system. This new system, known as 'Security on MOST' replaces the radio codes used on previous audio systems.

During vehicle production, the serial number of each component is extracted from its memory and stored in the gateway module. At every subsequent ignition on cycle, the Integrated Head Unit (IHU) reads the serial number for each component and compares them to the stored serial numbers in the gateway module. If an incorrect code detected the MOST system will shut down and the infotainment system will not function.

If an infotainment component is replaced, T4 will be required to disable the security on MOST feature. A file is downloaded which extracts the new serial number from the replacement component and records it in the gateway module. T4 is used to re-enable the security on MOST feature and restore the system security.

Infotainment Relay

An infotainment relay is located in the rear fusebox. The relay receives a permanent power supply from fusible link 8 in the passenger compartment fusebox. The relay coil is controlled by the IHU which provides a ground for the coil. When a vehicle unlocked signal is transmitted on the CAN, the message is received by the IHU which provides a ground for the relay, closing the contacts and supplying power to the audio/infotainment system components. The IHU maintains the relay in an energized condition for a period of time after the ignition is switched off to allow time for the navigation computer to 'power down' and also to allow a faster system start-up if the system is required subsequently.

The Digital Signal Processor (DSP) audio system comprises

1. DSP amplifier
2. Touch Screen Display (TSD)
3. Integrated Head Unit (IHU)
4. Six disc CD autochanger
5. 11 Speakers

The Harman/Kardon Logic7 audio system comprises

1. Logic7 amplifier
2. TSD
3. IHU
4. Six disc CD autochanger
5. 14 Speakers

Scheme 25

The Touch Screen Display (TSD) forms the basis of the audio system. It communicates with the rest of the audio/infotainment system on the MOST ring and allows control of the audio system and other infotainment systems from a single point.

The TSD communicates with the Integrated Head Unit (IHU) on the MOST ring and provides the driver interface and driver display of the audio system. The TSD also provides driver display and control of the telephone, the rear view camera, the Venture Cam, the navigation system, the Traffic Message Channel and the rear seat entertainment.

The audio system and other systems are operated by a combination of the physical buttons located on each side of the screen and the 'virtual' buttons displayed on the touch screen. For clarification, the physical buttons are referred to as 'buttons' and the touch screen virtual buttons are referred to as 'icons'.

The TSD is a touch sensitive, 800 X 600 pixels LCD VGA screen which displays in a 15.9:1 format.

Care should be taken with the TSD to ensure its correct operation

1. The screen should be cleaned with a lightly, water moistened cloth. Do not use chemical agents or domestic products to clean the screen or any part of the surround.
2. Only use your finger to operate the touch screen. Ensure you only use one finger to avoid incorrect entries.
3. A short light press of the touch screen is sufficient. Excessive pressure can damage the screen.

Six connectors provide the interface between the TSD and the other system components.

TSD Connector C2819

TSD Connector C2819

TSD Connector C2820

TSD Connector C2820

TSD Connector C2823

TSD Connector C2823

TSD Connector C2825

TSD Connector C2825

TSD Connector C2826

TSD Connector C2826

TSD Connector C2827

TSD Connector C2827

TSD Diagnostics

The TSD has an on-board diagnostics capability to allow the functionality of the following to tested

1. touch screen icons
2. Touch screen surrounding physical buttons
3. Vehicle input signals
4. Video inputs
5. RGB color display
6. Self test with fault codes displayed (if applicable)
7. Configuration settings of the TSD
8. Vehicle configuration
9. MOST ring function

Note. Fault codes can also be retrieved using T4.

Note. The navigation computer also has an on-board diagnostic mode which is accessible using the TSD. Refer to NAVIGATION SYSTEM for details.

Use the following procedure to get access to the diagnostic screens.

1. Insert the vehicle key in the ignition switch and turn to the ignition position II.
2. Once the 'CAUTION' screen has been displayed, press the 'AGREE' virtual button in the bottom right hand corner of the TSD. The 'Home Menu' will be displayed.
3. In a central position at the top of the TSD, press the screen and hold for 5 seconds, then release and press and hold the navigation physical button for 5 seconds and release. A 'Diag PIN Entry' box will appear.
4. In the 'Diag PIN Entry' box, enter the diagnostic PIN entry code of '753' and press the 'OK' icon on the TSD. A 'Diagnostics Menu' screen will appear.
5. The following selections can be made from the 'Diagnostics Menu' screen. Hard Key Test (physical buttons) Touch Switch Test (virtual icons) Vehicle signals Video Inputs Test RGB Color Test Self Test Configurations Vehicle Configurations MOST Test
6. Once a screen display is complete, you can return to the previous menu screen by pressing the return icon in the top right hand corner of the TSD.
7. Hard Key Test This screen displays a 'Hard Key Test Form' screen. The hard key test verifies the correct function of each of the physical buttons which surround the TSD. Pressing each button in turn will turn the applicable icon in the TSD green if the button is functioning correctly.
8. Touch Switch TestThis screen displays the 'Touch Switch Test' screen which gives two selections; 'Start Calibration' and 'Touch Switch Check'. The 'Start Calibration' screen allows re-calibration of the screen. The touch screen co-ordinates can be aligned by pressing a series of on screen targets. To return to the 'Touch Switch Test' screen, press the 'Navigation' physical button. The 'Touch Switch Check' screen displays a blank screen. Touching the screen will display a series of co-ordinates for the area of the screen which has been touched. This can be used to check if an area of the screen has a fault.
9. Vehicle Signals The vehicle signals screen displays inputs from other vehicle systems. The screen shows the 'real time' parameters and status of the following: Battery voltage Lights (on/off) Ambient light sensor voltage Backlight dimming duty (PWM %) Graphic illumination dimming duty (PWM %) Output audio allocation (AM/FM tuner, CD, Navigation, DVD, TV) PCB Temperature Speed inhibit (overspeed) (on/off) MOST FOT temperature (°C) Parking position (Park brake on/off) Backlight PWM duty Beep volume Beep tone.
10. Video Inputs Test The video inputs test screen allows the video inputs from the Venture Cam, Rear View Camera and the TV/DVD to be tested. Pressing the 'Companion Camera' icon enables the Venture Cam display. The Venture Cam must be removed from its docking station and switched on. The display can be switched between PAL and NTSC and also in two widescreen formats and a normal view. Pressing the 'Rear View Camera' icon enables the rear view camera display. The display can be switched between PAL and NTSC and also in two widescreen formats and a normal view. Pressing the 'TV/DVD' icon enables the display from the TV tuner or the DVD player. The display can be switched between PAL and NTSC and also in two widescreen formats and a normal view.
11. RGB Color Test The RGB color test form screen allows the TSD color outputs to be tested. By pressing each color in turn, the whole screen is displayed in that color and the whole screen area can be checked for uniform color display. Pressing the screen a second time returns to the RGB color test form screen.
12. Self Test The 'Self Test' screen displays the current ignition switch position, the battery output voltage and the diagnostic session. After a few seconds, the display will show any existing fault conditions in the form of a diagnostic trouble code and a brief description.
13. Configurations The 'Configurations' screen allows the data for the TSD and also the Navigation Computer to be displayed. The display can be switched between the TSD and the Navigation computer by pressing the icon in the top left hand corner of the screen, which displays either 'Show MMM Information' (navigation computer) or 'Show HLDF Information' (TSD). Each screen shows the following information: Vehicle Type Serial Number Part Number / Parts Level Land Rover Software Version MOST SWDL Block Size Main CPU Software/Bootloader Versions Main CPU Application Version Sub CPU Software Version Private CAN Database Version
14. Vehicle Configurations The 'Vehicle Configurations' screen has four separate screens which show information for each of the audio/navigation system components. Each screen can be displayed by pressing the 'Next' icon in the bottom right hand corner of the screen. A previous screen can be displayed by pressing the 'Prev.' icon adjacent to the 'Next' icon.
15. MOST Test The 'Most Test Form' screen shows the information being passed on the MOST ring for each driver input. For example, when the screen is displayed, adjusting the volume control using the TSD rotary control or the steering wheel switches will show the MOST ring signals being transmitted. This can be repeated for each function to establish that the driver request is being transmitted on the MOST ring.

Scheme 26

The Integrated Head Unit (IHU) is located behind the TSD above the gateway module. The IHU contains the radio functionality for the audio system. The IHU communicates on the MOST ring with all the other components in the system. The IHU is also the timing master for the MOST ring. The IHU is the controls and manages the MOST ring and provides the allocations of channels, system power management and the functionality and co-ordination of the other system components.

The IHU also controls the operation of the infotainment relay. The infotainment relay is located in the rear fusebox and the relay coil is controlled by the IHU which provides a ground for the coil. The relay supplies power to a number of the audio system components.

Radio signals are received by antennae located in the left hand rear quarter window and the rear screen. An FM antenna amplifier is located in the upper taildoor and passes AM/FM signals from the rear screen antennae to the IHU. A diversity antenna is located in the left hand rear quarter window. A FM diversity antenna amplifier is located behind the left hand luggage compartment trim panel, below the window and passes FM radio signals from the rear quarter window diversity antenna to the IHU. The FM diversity system uses a multi-antenna system which selects the strongest signals from the antennae. In weak signal areas the amplifier uses an integral ultrasonic noise detector to find the least distorted antenna signal to ensure maximum reception quality is maintained.

Diagnostic messages retrieved via T4 are routed from the IHU through the gateway module and into the instrument pack, prior to being transferred to the diagnostic socket.

IHU Connector C1354

IHU Connector C1354

IHU Connector C2115

IHU Connector C2115

IHU Connector C2105

IHU Connector C2105

IHU Connector C0738

IHU Connector C0738

Scheme 27

The Digital Sound Processor (DSP) amplifier is located in the rear LH side of the luggage compartment. The DSP amplifier drives eleven speakers; two front door mid-range, four front and rear door bass, four front and rear door tweeters on eight channels and a passive subwoofer. The amplifier produces 320 Watts of digital amplification to power the speakers.

DSP Amplifier Connector C0491

DSP Amplifier Connector C0491

DSP Amplifier Connector C0492

DSP Amplifier Connector C0492

DSP Amplifier Connector C0493

DSP Amplifier Connector C0493

DSP Amplifier Connector C2102

DSP Amplifier Connector C2102

Scheme 28

The Logic7 amplifier is located in the rear LH side of the luggage compartment. The Logic7 amplifier drives fourteen speakers on 5.1 surround channels; two front door mid-range, four front and rear door bass, four front and rear door tweeters on eight channels and a passive subwoofer as on the DSP system, but with two additional surround sound speakers located in the upper tail door and a center surround speaker located in the fascia.

Logic7 Amplifier Connector C0491

Logic7 Amplifier Connector C0491

Logic7 Amplifier Connector C0492

Logic7 Amplifier Connector C0492

Logic7 Amplifier Connector C0493

Logic7 Amplifier Connector C0493

Logic7 Amplifier Connector C2106

Logic7 Amplifier Connector C2106

Logic7 Amplifier Connector C2414

Logic7 Amplifier Connector C2414

Scheme 29

The six disc CD autochanger is located at the rear of the glove compartment. The CD autochanger is a standard fitment on all 2005 MY Range Rovers. The CD autochanger is capable of playing audio CDs and MP3 CDs. The autochanger uses a six disc magazine which is loaded into an aperture on the front of the unit.

The CD autochanger is connected on the MOST ring and receives a permanent fused power supply from the passenger compartment fusebox.

CD Autochanger Connector C0941

CD Autochanger Connector C0941

Satellite Digital Audio Radio Service (SDARS) (NAS Vehicles Only)

SDARS is a satellite based radio service which is currently only available in the USA. Digitally encoded audio transmissions are broadcast to receivers from two satellites or from ground based repeater stations. It is possible for the SDARS transmissions to be received in Canada and northern Mexico but reception is not guaranteed outside of the USA.

The service is provided by a company called Sirius. The service comprises over 100 channels of digital entertainment which is provided by subscription requiring a monthly payment.

Operation of the SDARS system is the same as the radio operation with selections made using the TSD icons or the TSD buttons and rotary controller.

The SDARS system requires additional components to be added to the audio system. An SDARS antenna and a receiver are fitted to allow reception of the service.

The customer must subscribe to receive the SDARS service. If the user selects a channel to which subscription is not authorized, the TSD will display the telephone number of the SDARS providers subscription service. The telephone number is stored in the IHU and can be changed or amended using T4.

Scheme 30

The SDARS antenna is located in the roof pod and is shared with the telephone system and navigation system where fitted. The roof pod is located externally in a central position towards the rear of the roof.

The roof pod contains two antennas for the SDARS system. One receives the digital transmissions from the SDARS satellites and the second receives transmissions from the ground based repeater stations.

The SDARS antennas are connected to the SDARS receiver using co-axial cables.

Scheme 31

The SDARS receiver is a dedicated SDARS head unit and tuner which is controlled by the IHU on the MOST ring. The receiver is located in the left hand rear of the luggage compartment.

The receiver processes the signals from the SDARS antennas. The signals are filtered and the receiver determines which of the two signals is the strongest with the least distortion to use for the audio output. For example, if the vehicle drives into a tunnel, the receiver will change from a satellite signal to a repeater station signal to maintain the strongest signal.

SDARS Receiver Connector C2989

SDARS Receiver Connector C2989

SDARS Receiver Connector C2158

SDARS Receiver Connector C2158

The TSD can store diagnostic fault codes to enable diagnosis of system malfunctions. The fault codes can be accessed using T4 or by using the on-board diagnostic routine available on the TSD. Refer to Touch Screen Display .

Scheme 32

Additional control of the audio system is available in the form of steering wheel mounted switches which are located on the right hand side of the steering wheel. The switches provide for volume adjustment, change pre-set radio station, fast forward tape or CD tracks.

The steering wheel audio control switches are hardwired to the rotary coupler. An I bus connection from the rotary coupler is then connected to the gateway module which processes the analogue signals from the switches into digital signals. These digital signals are then passed from the gateway module to the IHU to control the requested audio functions.

Initial Screen Display

Once powered the TSD will initially display the 'Land Rover' image for a short time followed by the last displayed screen or menu. On a new vehicle, when the system is operated for the first time, the system will display the 'Home' menu to allow the user to adjust the factory default settings. The system settings are set to suit the market to which the vehicle is to be delivered. These can be changed by the customer to suit their preferences.

The infotainment system can be operated at times when the ignition key is removed from the ignition switch and is known as one hour mode. Pressing the audio on/off button will power the system for a period of one hour. After the one hour period, the system will power down to avoid excessive drain on the vehicle battery.

The radio is operated from the TSD. Access to the radio mode can be achieved in two ways; by touching the Audio Video icon on the home menu or by pressing the Mode button, turning the RH rotary control until Radio is highlighted and then pressing the Mode button for a second time.

Selecting the radio option will allow the user to

1. Select the band (AM, FM, MW, SDARS)
2. Auto store stations
3. Select preset stations
4. Use the 'Seek' function to locate stations
5. Manual tuning to locate stations
6. Program search by station type (PTY)
7. Enable RDS station reception
8. Enable traffic and news broadcasts

The CD autochanger is selected from the TSD. Access to the CD autochanger can be achieved in two ways; by touching the CD icon if the TSD is currently displaying an audio source (radio, TV etc.) or by pressing the Mode button, turning the RH rotary control until CD is highlighted and pressing the Mode button for a second time.

Selecting the CD option will allow the user to

1. Play CD's
2. Select tracks
3. Track search (fast forward/reverse)
4. Disc selection (icons 1 to 6)
5. Pause to suspend play
6. Additional playback features (random play, repeat track, CD scan).

The CD autochanger is capable of playing MP3 discs. The system will recognize an MP3 disc and display additional information on the TSD.

Voice Recognition

The voice recognition system controls the following systems (where fitted)

1. Audio (radio and CD)
2. Telephone
3. Note pad
4. Touch screen display
5. Rear seat entertainment
6. Navigation.

On vehicles without the navigation system, the voice recognition software is contained in the telephone Transceiver Module (TM). The audio system is not supported for voice control by the TM, therefore voice operation of the audio functions is not possible.

On vehicles with the navigation system, the voice recognition software is contained in the navigation computer. The microphone is hardwired to both the navigation computer and the IHU. The navigation computer will allow voice control of the audio system, the telephone system, the rear seat entertainment and the navigation system. The navigation computer supports German, French, Italian, Spanish, USA, UK, Japanese, Dutch and USA languages with male and female voices.

The voice recognition system enables the driver to activate functions of the audio system without operating controls manually. This allows the driver to concentrate on driving the vehicle, improving safety. When the driver speaks one of the defined voice commands, with the voice recognition system active, the voice recognition software converts the command into a control signal for the audio system.

Audio Voice Recognition Functions

The radio can be accessed and controlled by the voice recognition system as follows

1. Radio On This allows the user to operate the radio function. "Radio on" switches the audio system to radio which comes on with the last selected station.
2. Radio Tune This allows the user to tune the radio to the required frequency and waveband.
3. Radio Presets This function allows the user to allocate a frequency against a given band preset. The radio must be tuned to the required frequency and wavelength before the preset is allocated. If a preset position already has a frequency and wavelength allocated, the new frequency and wavelength will over-write the existing preset. The auto-store function commands the radio to store the six strongest signals and allocate them against the auto-store presets. Voice commands allow the user to tune the radio to a given preset within the waveband which is currently selected.
4. Radio Directory This function allows the user to add a 'nametag' to the current selected frequency and waveband including satellite stations when SDARS is fitted. The nametags are user repeatable association names given to identify a particular frequency and waveband. The voice recognition system allows 20 nametags to be stored. When the nametag function is operating the requested frequency and waveband is displayed in the instrument pack message center.

The CD autochanger can be accessed and controlled by the voice recognition system as follows

1. The voice controls are standard control features with the exception of CD controls which can be accessed using the steering wheel switches. Commands are available for up to 256 tracks on a CD. A text numeric format is used for track identification using three numbers, i.e. track 6 will be displayed as 006. MP3 format discs have commands for folder up/down.

The Touch Screen Display (TSD) responds to voice commands to allow the user to change the display mode.

Voice Recognition Settings

A number of settings allow the user to customize the voice recognition system as follows

1. Voice Feedback - On/Off This feature allows the user to switch audible feedback on or off for most functions, with the exception of some necessary function which must have feedback to operate correctly.
2. Replay The replay command requests the voice recognition system to repeat the last dialogue response within a list in both audible and associated text feedback.
3. Notepad The notepad function allows the user to record a series of 10 notes for up to 5 minutes. The user can replay or delete the notes in the order in which they were recorded. It also allows the user to delete the entire contents of the notepad.
4. Traffic Message Channel (TMC) The TMC system is part of the navigation system (when fitted). The TMC system provides real time traffic information to the navigation system. The TMC voice commands can be used to switch the TMC On or Off.

See also:
• NAVIGATION SYSTEM
• Touch Screen Display