Part 2
Checking the system, digital versatile disc player and screens (Continued)
Checking the remote control
Make sure the remote control batteries are fully charged.
- Turn off the system with the main switch on the DVD player.
- Wait until the system has shut down.
- Turn on the system with the remote control aimed at the left screen.
Then repeat with the right screen.
Do the screens come on?
Yes - Checking the DVD player
No - Checking the remote control signal
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Checking the remote control signal
Hint: If none of the screens come on in the previous test, the probable cause is a damaged remote control or discharged batteries.
Hint: If only one screen does not come on in the previous test, it indicates that the cable for infrared (IR) signals is probably damaged.
Hint: Activation of the infrared IR-receivers in the head restraints can be checked by the IR-lights in the screen's lower edge being on dimly after the system has been turned on.
Checking IR-signal, left screen
Check the lead for the infrared (IR) signal between the screen and rear seat entertainment module (RSE) for open circuit. For more information, see wiring diagram and signal description.
To check the voltage level on the signal cable for IR-signal, proceed as follows:
- Connect all cables and connectors.
- Measure the voltage between the signal cable for the Infra Red (IR) signal to the left-hand display screen and ground. The measured voltage is reference value.
Note! Do not press any of the buttons on the remote control during this measurement.
- Measure from the rear side of a suitable connector. Do not damage the terminals in the connector.
- Aim the remote control at the left screen and press in a button on the remote control. The voltage on the signal cable must fall slightly for as long as the button on the remote control is pressed in.
Note! Important in this measurement are not the absolute voltage levels, instead you get a voltage difference downward.
Checking IR-signal, right screen
Compare the latest reading as above with the signal for the infra red (IR) signal from the right-hand infra red (IR) receiver for the display screen.
Conclusion
- If the result of the above checks is that no malfunction was found, this means that the receivers in both screens work and that the remote control is OK.
- If voltages on the cables are OK but a lower voltage cannot be measured when a button on the remote control is pressed down, try with replacing the remote control.
Other information
- Signal specification, rear seat entertainment module (RSE), generation 4.1 Signal Specification, Rear Seat Entertainment Module (RSE), Generation 4.1
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Verification
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Checking the DVD player
Check that the DVD is not damaged and that it is clean. Try using another DVD if necessary.
Check that nothing has jammed in the DVD player. Check that there are no mechanical grinding noises coming from the DVD player when it is in operation.
Check that the disc can be inserted and ejected without problems.
Note! Only one disc at a time may be loaded in the DVD-player.
Check that the transport protection disc, which is supplied with system at delivery, is not in the DVD-player.
Was a fault detected?
Yes - Verification
No - Checking the function
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Checking the function
- Select the dvd-player as source for one of the screens and press on the remote control's PLAY button.
Check that picture is shown and sound is heard at playback.
Note! If there is a picture but no audio in one or both of the headphones, see other fault tracing.
If picture and sound are shown, start-up of the system, DVD-player, and screens is ok.
Is there a picture?
Yes - No Fault Found
No - Checking the cable and component
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Checking the cable and component
Check the leads for video signals between the TV-receiver and rear seat entertainment module (RSE) for short-circuiting to voltage, short-circuiting to ground, and open circuit. There are two video leads for each screen. Regards the cables from rear seat entertainment module (RSE), terminals #E10 and #E11 for left screen as well as terminals #E22 and #E23 for right screen.
For more information, see wiring diagram and signal description.
Other information
- Signal specification, rear seat entertainment module (RSE), generation 4.1 Signal Specification, Rear Seat Entertainment Module (RSE), Generation 4.1
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Verification
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Checking CAN cables
Hint: If the power supply and ground to the screen are working properly but the screen has no contact with the rear seat entertainment module (RSE)/DVD player via the CAN network, the screen will come on in LOCAL mode at start-up. Then neither sound will be heard nor picture shown at playback from DVD-player to this screen. Menus available locally in the screen can be accessed.
Check if the screens are activated in LOCAL-mode, which means that there is malfunction on the CAN-leads.
Check the leads for CAN-communication between rear seat entertainment module (RSE)/DVD-player and screens, #E3 and #E4 (left screen) and #E15 and #E16 (right screen, for short-circuiting to voltage, short-circuiting to ground, and open circuit.
In connector D, on rear seat entertainment module (RSE)/DVD-player, there is a bridging of the CAN-net for the right screen. Bridging is in place to enable future expansion of the system with additional control modules. If connector B has been damaged or is disconnected or if for some reason there is no contact between the two ends of the CAN cable jumper, it will not be possible to establish communication with the right screen.
Hint: If a screen is not working, try switching places between the screens/head restraints. If the malfunction remains, this indicates a malfunction either in the leads between the screen's circuit board and the display itself or in the display itself.
For more information, see wiring diagram and signal description.
Other information
- Signal specification, rear seat entertainment module (RSE), generation 4.1 Signal Specification, Rear Seat Entertainment Module (RSE), Generation 4.1
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Verification
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Checking wake-up signal
The control module makes three attempts to activate a screen by transmitting a high signal on the cable as a wake-up signal to the screen in question. This takes place according to the following pattern, on the condition that the screen does not reply. Normally only one wake-up signal is sent for the screen to wake up.
If the pattern below appears, the screen is not responding.
- High voltage (approx. 11.5 V) for approx. one second.
- Low voltage (approx. 0 V) for approx. one second.
- High voltage (approx. 11.5 V) for approx. one second.
- Low voltage (approx. 0 V) for approx. 10 seconds.
- Constant high voltage.
Measurement of wake-up signal.
When the ignition is on, the rear seat entertainment module (RSE) performs a simple internal system-check and starts the start-up procedure with the screens. For more information, see Design and Function.
- Measure wake-up signal at the screen. Measure from the rear side of a suitable connector. Do not damage the terminals in the connector. Measure signal that goes to the screen that does not answer the wake-up calls.
- Switch on the ignition. Lighting in the DVD-player's buttons is activated.
- Note voltage of the wake-up signal.
For more information, see wiring diagram and signal description.
Other information
- Signal specification, rear seat entertainment module (RSE), generation 4.1 Signal Specification, Rear Seat Entertainment Module (RSE), Generation 4.1
- Checking wiring and terminals Checking Wiring And Terminals
Is there any wake-up signal?
Yes - Checking CAN cables
No - Checking the cable and component
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Checking the cable and component
Take measurements for the screen that is not communicating.
Check the lead for the wake-up signal from rear seat entertainment module (RSE)/DVD-player to screens, #E2 (left screen) and #E14 (right screen), for short-circuiting to ground and open circuit.
Check the connector for rear seat entertainment module (RSE)/DVD-player as well as screens for loose contact, contact resistance and oxidation.
Hint: If a screen is not working, try switching places between the screens/head restraints. If the malfunction remains, this indicates a malfunction either in the leads between the screen's circuit board and the display itself or in the display itself.
For more information, see wiring diagram and signal description.
Remedy as necessary.
Other information
- Signal specification, rear seat entertainment module (RSE), generation 4.1 Signal Specification, Rear Seat Entertainment Module (RSE), Generation 4.1
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Verification
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Checking wake-up signal
Rear seat entertainment module (RSE) (DVD-player) has not established contact with one or both screens. Follow the procedure below to check which screen has not responded.
Note! Switch off the system before connecting/disconnecting a connector.
- Turn off the ignition.
- Connect a voltmeter between the cable for the wake-up signal to right screen and ground. Measure wake-up signal at the screen. For more information, see wiring diagram and signal description. Measure from the rear side of a suitable connector. Do not damage the terminals in the connector.
- Switch on the ignition. Wait approximately 10 seconds.
Check the voltage of the wake-up signal. Note voltage of the wake-up signal.
- Then measure the wake-up signal of the left screen. Note voltage of the wake-up signal.
Select an alternative as set out in the table above.
1 - Checking the power supply and ground terminal
2 - Checking the cable and component
3 - Checking CAN cables
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Checking the power supply and ground terminal
Take measurements for the screen that is not communicating.
Check the voltage feed from rear seat entertainment module (RSE)/DVD-player to screens, #E1 (left screen) and #E13 (right screen), for short-circuiting to ground and open circuit. The voltage must be approximately battery voltage when the ignition is on.
Check the ground connection from rear seat entertainment module (RSE)/DVD-player to screens, #E12 (left screen) and #E24 (right screen), for short-circuiting to voltage and open circuit.
Check the connector for rear seat entertainment module (RSE)/DVD-player as well as screens for loose contact, contact resistance and oxidation.
Hint: If a screen is not working, try switching places between the screens/head restraints. If the malfunction remains, this indicates a malfunction either in the leads between the screen's circuit board and the display itself or in the display itself.
For more information, see wiring diagram and signal description.
Remedy as necessary.
Other information
- Signal specification, rear seat entertainment module (RSE), generation 4.1 Signal Specification, Rear Seat Entertainment Module (RSE), Generation 4.1
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Verification
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Checking the cable and component
Take measurements for the screen that is not communicating.
Check the lead for the wake-up signal from rear seat entertainment module (RSE)/DVD-player to screens, #E2 (left screen) and #E14 (right screen), for short-circuiting to ground and open circuit.
Check the connector for rear seat entertainment module (RSE)/DVD-player as well as screens for loose contact, contact resistance and oxidation.
Hint: If a screen is not working, try switching places between the screens/head restraints. If the malfunction remains, this indicates a malfunction either in the leads between the screen's circuit board and the display itself or in the display itself.
For more information, see wiring diagram and signal description.
Remedy as necessary.
Other information
- Signal specification, rear seat entertainment module (RSE), generation 4.1 Signal Specification, Rear Seat Entertainment Module (RSE), Generation 4.1
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Verification
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Checking CAN cables
Check the leads for CAN-communication between rear seat entertainment module (RSE)/DVD-player and screens, #E3 and #E4 (left screen) and #E15 and #E16 (right screen, for short-circuiting to voltage, short-circuiting to ground, and open circuit.
In connector D, on rear seat entertainment module (RSE)/DVD-player, there is a bridging of the CAN-net for the right screen. Bridging is in place to enable future expansion of the system with additional control modules. If connector B has been damaged or is disconnected or if for some reason there is no contact between the two ends of the CAN cable jumper, it will not be possible to establish communication with the right screen.
Hint: If a screen is not working, try switching places between the screens/head restraints. If the malfunction remains, this indicates a malfunction either in the leads between the screen's circuit board and the display itself or in the display itself.
For more information, see wiring diagram and signal description.
Remedy as necessary.
Other information
- Signal specification, rear seat entertainment module (RSE), generation 4.1 Signal Specification, Rear Seat Entertainment Module (RSE), Generation 4.1
- Checking wiring and terminals Checking Wiring And Terminals
Continue - Verification
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