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Home >> Volvo >> 2013 >> XC90 Base, AWD >> Repair and Diagnosis >> Electrical >> Charging Systems >> Electrical Systems - System Overview >> Rear Seat Entertainment System (RSE), Generation 4.1 (2006-2007) >> Function >> System Start-Up

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.

Left screen Right screen Conclusion
Voltage is continually high (11.5 V). Voltage is continually high (11.5 V). Communication with both screens established and OK.
Voltage is high (11.5 V) but drops to 0 V every 10 seconds. Voltage is 0 V. No communication with left screen.
No attempt made with right screen.
Voltage is continually high (11.5 V). Voltage is high (11.5 V) but drops to 0 V every 10 seconds. Communication with left screen established and OK.
No communication with right screen.
Voltage is continually high (11.5 V). Voltage is 0 V. Communication with left screen established and OK.
Probable open-circuit on wake-up signal for right screen.
Voltage is 0 V. Voltage is 0 V. No communication with left screen.
No attempt made with right screen.
Probable open-circuit on wake-up signal for left screen.
Voltage is high (11.5 V) but drops to 0 V every 10 seconds. Voltage is high (11.5 V) but drops to 0 V every 10 seconds. Probable fault with CAN communication with screens.

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.

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