Checking display screens
Switch off the system before connecting/disconnecting a connector.
Disconnect the connector from the one display screen. Turn on the system and investigate the trouble symptom. If the malfunction still exists, check in the same way but reinstall the first connector for the other screen.
Checking the head restraints
Minimize fault-tracing by swapping the position of the two head restraints to see if the fault "follows". Change places of the head rests and check the trouble symptom.
HINT: It is unusual for a screen to break.
Checking the remote control signal
Checking the wiring
Turn off the ignition.
Check the wiring and connectors between the display screens. Check for damage or oxidation. Check for a short-circuit to ground. Check for a short-circuit to supply voltage. Also check the connector on the Rear Seat Entertainment Module (RSE). Check for damage and oxidation. Remedy as necessary.
Checking IR-signal, left screen
Check the cable between the upper connector to the display screen terminal #4 and Rear Seat Entertainment Module (RSE) terminal #A4. Check for an open-circuit.
Check the cable between the upper connector to the display screen terminal #5 and Rear Seat Entertainment Module (RSE) terminal #A5. Check for an open-circuit.
Connect the head restraint, turn on the ignition and measure the voltage on connection #5 for the screen. The voltage must be 4-5 V.
To check the voltage level on signal cable for IR-signal #4, 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 voltage must be 4-5 V.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 to approximately 3.5 V for as long as the button on the remote control is pressed in.
Checking IR-signal, right screen
Check the cable between the upper connector to the display screen terminal #4 and Rear Seat Entertainment Module (RSE) terminal #A14. Check for an open-circuit.
Check the cable between the upper connector to the display screen terminal #5 and Rear Seat Entertainment Module (RSE) terminal #A15. Check for an open-circuit.
Connect the head restraint, turn on the ignition and measure the voltage on connection #5 for the screen. The voltage must be 4-5 V.
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
- See Signal specification, rear seat entertainment module (RSE)
- For further information about the fuses and relays, see the Wiring Diagram.
- See Head restraint with TV screen, replacing
- See Checking wiring and terminals
Was a fault detected?