Workshop Hints: Initialization

Initialization of the SHD control unit is necessary after:

• Intervention in the mechanical sequence, e.g. manual operation or roof position changed while module was removed.
• Interruption of power supply while the sunroof was moving.
• Replacement of SHD control unit or sunroof cassette.

Disconnection of the battery does not erase the stored positions in the control unit.

The initialization consists of 2 operations that are required for complete functioning of the sunroof:

1. Standardization: This is when the sunroof module measures and stores the mechanical end position of the sunroof in the end position "lift". This end position is used by the module to calculate the remaining positions.
2. Learning the characteristic curve: the sunroof module stores the required force to move the sunroof).

Initialization is performed as follows:

• Press the operating switch to the "Lift" position and hold it there.
• After 15 seconds, the sunroof drive runs towards "lift." The end position is saved in the module.
• In the position "Lift," the drive stops for 5 seconds and then runs towards "Close." The characteristic curve for "Close from Lift" is learned.
• The drive then moves to the "Open" end position, turns around and moves towards "Close." The characteristic curve for "Close" is learned.

The switch must remain pressed during the entire procedure. If the switch is released, the procedure must be repeated. The anti-trapping protection does not function during initialization.

A Check Control message is issued by the SHD until initialization is performed.