SYSTEM START-UP Volvo XC90 I facelift

SYSTEM START-UP

When the ignition is switched on the Rear seat entertainment module (RSE) performs a basic internal system check and starts the start-up procedure with the screens.

The start-up process differs depending on software.

Previous software

Start-up process, no communication fault

1. The ignition is switched on.
2. Lighting in the DVD-player's buttons is activated.
3. The Rear seat entertainment module (RSE) feeds the connections #E1 (left-hand screen) and #E13 (right-hand screen) with voltage.
4. The Rear seat entertainment module (RSE) sends a wake-up signal of approximately 11.5 V to connection #E2 for the left-hand screen.
5. The left-hand screen then returns an OK signal to the Rear seat entertainment module (RSE) via the internal CAN network.
6. The Rear seat entertainment module (RSE) returns a message to the left-hand screen on the CAN network which assigns the screen number 1. This is necessary for the video and audio to be addressed to the right screen and so that commands from the remote control can be executed on the right screen. Wake-up signal's voltage maintained at 11.5 V.
7. Communication for the left-hand screen is now OK.
8. The Rear seat entertainment module (RSE) sends a wake-up signal of approximately 11.5 V to connection #E14 for the right-hand screen.
9. The right-hand screen then returns an OK signal to the Rear seat entertainment module (RSE) via the internal CAN network.
10. On the CAN, the Rear seat entertainment module (RSE) sends back a message to the right hand screen allocated screen number 2. The wake-up signal's voltage is maintained at 11.5 V.
11. Communication for the right-hand screen is now OK.
12. Lighting in the DVD-player's buttons, except the POWER button, goes out.
13. The start-up procedure is implemented and the system switches to standby.

Start-up times

A start-up with fault-free communication takes 4-10 seconds.

Start-up process, communication fault with left screen

1. The ignition is switched on.
2. Lighting in the DVD-player's buttons is activated.
3. The Rear seat entertainment module (RSE) feeds the connections #E1 (left-hand screen) and #E13 (right-hand screen) with voltage.
4. The Rear seat entertainment module (RSE) sends a wake-up signal of approximately 11.5 V to connection #E2 for the left-hand screen.
5. No response from left screen. The Rear seat entertainment module (RSE) maintains high voltage (11.5V), but drops it down to 0 V every 10 seconds until further notice. The wake-up signal to the right screen is 0 V.
6. Lighting in the DVD player's buttons follow the same pattern as the wake-up signal for the left screen.
7. The system will not work.

Start-up process, communication fault with right screen

1. The ignition is switched on.
2. Lighting in the DVD-player's buttons is activated.
3. The Rear seat entertainment module (RSE) feeds the connections #E1 (left-hand screen) and #E13 (right-hand screen) with voltage.
4. The Rear seat entertainment module (RSE) sends a wake-up signal of approximately 11.5 V to connection #E2 for the left-hand screen.
5. The left-hand screen then returns an OK signal to the Rear seat entertainment module (RSE) via the internal CAN network.
6. The Rear seat entertainment module (RSE) returns a message to the left-hand screen on the CAN network which assigns the screen number 1. This is necessary for the video and audio to be addressed to the right screen and so that commands from the remote control can be executed on the right screen. Wake-up signal's voltage maintained at 11.5 V.
7. Communication for the left-hand screen is now OK.
8. The Rear seat entertainment module (RSE) sends a wake-up signal of approximately 11.5 V to connection #E14 for the right-hand screen.
9. No response from right screen. The Rear seat entertainment module (RSE) maintains high voltage (11.5V), but drops it down to 0 V every 10 seconds until further notice. The wake-up signal to the left screen (whose communication is OK) is continually high (11.5V).
10. Lighting in the DVD player's buttons follow the same pattern as the wake-up signal for the right screen.
11. The system will not work.

Start-up process, CAN related fault

1. The ignition is switched on.
2. Lighting in the DVD-player's buttons is activated.
3. The Rear seat entertainment module (RSE) feeds the connections #E1 (left-hand screen) and #E13 (right-hand screen) with voltage.
4. The Rear seat entertainment module (RSE) sends a wake-up signal of 11.5 V at the same time to both terminals, #E2 for the left screen and #E14 for the right screen.
5. The Rear seat entertainment module (RSE) maintains high voltage (11.5 V) to both screens, but drops it down to 0 V every 10 seconds until further notice.
6. Lighting in the DVD player's buttons follow the same pattern as the wake-up signal for the screens.
7. The system will not work.

Conclusions of start-up signal's voltage

By checking the wake-up signal's voltage to both the screens during system start-up, the following conclusions can be drawn. The table below is worked into the symptom fault-tracings.

Later software

1. The ignition is switched on.
2. Lighting in the DVD-player's buttons is activated.
3. The Rear seat entertainment module (RSE) feeds the connections #E1 (left-hand screen) and #E13 (right-hand screen) with voltage.
4. The Rear seat entertainment module (RSE) sends a wake-up signal of approximately 11.5 V to connection #E2 for the left-hand screen.
5. The left-hand screen then returns an OK signal to the Rear seat entertainment module (RSE) via the internal CAN network. NOTE: the screen does not respond on the CAN network, the Rear seat entertainment module (RSE) makes a further two attempts according to the pattern below (*). If the screen does not respond the Rear seat entertainment module (RSE) continues as set out in section 8 below.
6. The Rear seat entertainment module (RSE) returns a message to the left-hand screen on the CAN network which assigns the screen number 1. This is necessary for the video and audio to be addressed to the right screen and so that commands from the remote control can be executed on the right screen.
7. Communication for the left-hand screen is now OK.
8. The Rear seat entertainment module (RSE) sends a wake-up signal of approximately 11.5 V to connection #E14 for the right-hand screen.
9. The right-hand screen then returns an OK signal to the Rear seat entertainment module (RSE) via the internal CAN network. NOTE: If the screen does not respond on the CAN network, the Rear seat entertainment module (RSE) makes a further two attempts according to the pattern below (*). If the screen does not respond the Rear seat entertainment module (RSE) continues as set out in item 12 below.
10. The Rear seat entertainment module (RSE) returns a message to the right-hand screen on the CAN network which assigns the screen number 2.
11. Communication for the right-hand screen is now OK.
12. Lighting in the DVD-player's buttons, except the POWER button, goes out.
13. The start-up procedure is implemented and the system switches to standby.
14. The system can now be started using the POWER button on the DVD player or the remote control.

(*) Wake-up signal (signal pattern with a fault)

High signal (approx. 11.5 V) is sent for approx 1 second (first attempt).

If there is no response a low signal is sent (approx. 0 V) for approximately 1 second.

High signal (approx. 11.5 V) is sent for approx 1 second (second attempt).

If there is no response a low signal is sent (approx. 0 V) for approximately 10 seconds.

High signal is sent (approx. 11.5 V) and remains continuously high (third and last attempt).

Start-up times

Start-up without faults detected takes approximately 4-10 seconds.

Start-up with communication fault on one screen takes approximately 20-25 seconds.

Start-up with communication fault on both screens takes approximately 30-35 seconds.

The times above should only be seen as a guide and are not exact times.

Scheme 275

The rear audio separation module (RAS) (16/122) is designed to redirect audio signals from the car's internal audio system or from the system's DVD player to the rear speakers (16/5, 16/6, 16/57 and 16/58).

When the unit is in normal mode, audio signals are routed from the front audio system to the rear speakers.

The remote control can be used to activate the rear audio separation module (RAS). Audio signals from the front audio system will then be replaced with audio signals from the rear seat entertainment system.

Which audio channel is connected to the rear speakers is determined by which screen the remote control is aimed at when the button to activate the rear audio separation module (RAS) is pressed.

If a parking assistance system is installed, the control module is temporarily deactivated via an input when reverse gear is engaged. The deactivation signal comes from the same voltage circuit the drives the reversing lights. The parking assistance system signals will then be heard via the rear speakers.

Scheme 276

Each screen houses an IR receiver. The IR receivers are directly connected to the rear seat entertainment module (RSE) (16/82) and are activated when the rear seat entertainment module (RSE) is supplied power. When a button is pressed on the remote control, it emits a signal with infrared light. The coding of this signal varies depending on which button was pressed. The IR signal is received by the IR receiver below the respective head restraint screen (16/81A, B) and is forwarded to the rear seat entertainment module (RSE) for processing.

The remote control can be used to switch between different audio and/or video inputs in the system

1. DVD player, audio/video
2. AUX input, audio or audio/video
3. Audio from the front audio system to one of the headphones, both headphones or separately to one of the headphones and the rear speakers
4. Audio/video from a TV receiver (if installed) to one or both screens.

Selection is carried by pointing the remote control towards the screen to be commanded. Depending on which of the two screens that received the command, the Rear seat entertainment module (RSE) selects AV or audio source for the screen. The remote control can then be pointed to the other screen to select the source for that screen.

Scheme 277

The system includes two pairs of IR headphones as standard. Any number of headphones can be used as long as they are within range of the IR transmitter.

Sound is transferred from the screen to the wireless headphones via an infrared signal. There must be free travel between the transmitter in the bottom edge of the screen and the receivers on the side of the headphones. If the way is blocked, the signal may be interfered with and sound quality will thus deteriorate.

The headphones are switched on with the switch located on the side. The headphones switch off automatically if no IR signal is received for 3-4 minutes.

The headphones also have a button to set which audio channel to listen to. Channel A or B can be selected. Channel A is always transmitted from the left screen and channel B is always transmitted from the right screen.

Note. Lowering the volume of the screen will increase the signal/noise ratio of the headphones. Optimal headphone output is obtained by setting screen volume to 75%. Headphone volume can then be regulated using the wheel on the headphones themselves.

The tables below include the in and output signals for the units in the system for rear seat entertainment.

Note. The CAN communication given here is only a private CAN between the control module and the screens.

REAR SEAT ENTERTAINMENT MODULE (RSE)/DVD PLAYER (16/82)

REAR AUDIO SEPARATION MODULE (RAS) (16/122)

SCREEN, HEAD RESTRAINT (16/81A, B)

INFRARED HEADPHONES

Rear seat entertainment module (RSE) is the central unit in the system for rear seat entertainment.

The control module is integrated with the DVD player and is located at the rear edge of the center console.

The control module interprets and executes the commands given by the user with the system's infrared remote control. These commands are transmitted from the remote control to Rear seat entertainment module (RSE) via system's infrared receivers in the screens. Rear seat entertainment module (RSE) also distributes current to the system's other components.

Rear seat entertainment module (RSE) distributes audio and video signals from the DVD-player to screens and speakers in the system. Via external inputs, other audio and video sources can also be connected, e. g., game pads or video cameras.

The DVD player mechanism has an anti-shock system and it helps to prevent the image or sound skipping when played. The DVD player has slot-in disc insertion and region coding programmed into the software. The region code can be changed using a security code.

The following media formats can be played by the DVD player

1. DVD-R/+R
2. DVD-RW/+RW
3. CD-R and CD-RW
4. CDDA
5. HDCD

The following information formats can be played

1. DVD
2. DVD Audio
3. VCD
4. SVCD
5. DivX
6. WMV
7. Audio CD
8. Kodak photo CD
9. MP3
10. MP3 Pro
11. playlists in M3U format
12. WMA Sound.

Formats such as THX and DolbyDigital are also supported. Only stereo signals of this audio format are reproduced.

The control module is supplied with power from the Ext. X-supply in the Central electronic module and directly from the battery.

To easily check whether the control module is powered and grounded, switch on the ignition. The background illumination on the function buttons should then come on.