Renault Megane Quiz
Electrical equipment

Electric sunroof: Operation

In this manual: Electrical equipment
Engine and peripherals — 141Chassis — 79Chassis — 72Renault Mégane III Driver's Manual — 87Electrical equipment — 221Engine and peripherals — 47Electrical equipment — 80Transmission — 14Air conditioning — 30Bodywork — 115Trim and upholstery — 44General vehicle information — 27Air conditioning — 59General vehicle information — 16Transmission — 38Sealing and soundproofing — 7General vehicle information — 3
9steps
~54min
2/5difficulty
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I - GENERAL

The electric sunroof has an anti-pinch mode that is regulated according to vehicle speed.

IMPORTANT

The anti-pinch mode is only operational if the sunroof has been correctly initialised.

Note: The sunroof closing (sliding or tilting) can be controlled by a long press (about two seconds) on the RENAULT badge close button. This signal is managed by the cabin control unit if it is correctly configured (Cabin Interconnection Unit chapter).

In this case, the switch remains in its last position used.

Press the switch to reposition the sunroof to the position it was in before it was closed using the RENAULT badge.

Sunroof electric motor fault

Toit ouvrant électrique : Fonctionnement

If the sunroof motor fails, it can be operated manually (1) using a six-point (hex) male key.

II - OPERATING PRINCIPLE

Toit ouvrant électrique : Fonctionnement

The electric sunroof motor has two functions:

  • tilt (vent): 1 position,
  • slide: 3 positions.

The sunroof is operated by the switch (2).

To operate, the sunroof motor must receive authorisation from the Cabin Central Unit:

  • 0 V signal: sunroof movement authorised (opening or closing),
  • +12 V signal: sunroof movement not authorised,
  • duty cycle signal for opening: automatic sunroof closing by long press on the remote control.

III - SCHEMATIC DIAGRAM

Toit ouvrant électrique : Fonctionnement
  1. Fuse-relay box
  2. Body control unit
  3. ABS control module
  4. Switch
  5. Power supply - earth
  6. Locking authorisation
  7. Vehicle speed information
  8. Opening - closing
  9. Sunroof electric motor

IV - ANTI-PINCH

Obstacle detection is based on analysis of the motor rotation speed. Encountering an obstacle results in a significant change in speed.

Two sensors integral with the motor generate periodic signals. Speed can thus be determined over half a turn.

During the initialisation phase, a speed curve is stored by the control unit integrated into the motor.

For the anti-pinch function, the control unit compares the travel speed with the stored speed.

Depending on the deviations recorded, the system activates anti-pinch mode.

IMPORTANT

The anti-pinch function is only operational if the sunroof has been correctly initialised (see below).

Note: The anti-pinch function can be inhibited in order to overcome a hard point (deformed rail, foreign body in the guide channels).

To do this, keep pressing until the sunroof closes in step-by-step mode. When the switch is released, anti-pinch becomes active again.

V - INITIALISATION PROCEDURE

IMPORTANT

If the battery is disconnected, an electrical fault occurs or the sunroof is worked on, the system will only operate in manual mode, with jerky movement.

To perform initialisation:

  • set the switch to the closed position,
  • press and hold the switch for at least two seconds: the motor moves in step-by-step mode, then lowers a few centimetres,
  • release the switch.

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