Power window synchronization, function - GF72.29-P-4003R

MODEL 230 

Synchronization links the counter reading for position recognition with the actual position of the side window in the relevant door control module.

The following control modules must be synchronized:

• Left door control module (N69/1)
• Right door control module (N69/2)
• RVC control module (N52)

Synchronization must be performed whenever desychronization has taken place.

If a window is not synchronized, the end position of the respective side window is not known to the corresponding door control module and the automatic raising function cannot be carried out.

Synchronization is therefore required for the automatic raising function of the power windows.

Synchronization 

Move the relevant window with the power window switch into top block position and continue operating switch in the manual closing function. If the control module has recognized a lockup of the engine for at least 0.3 s, it sets the counter for the position recognition to zero. The window is now in the synchronized state, this means that the control module can now switch off the motor during opening and closing of the window before the mechanical stop is reached.

Resynchronization 

The control module automatically performs resynchronization if there is an error in position recognition, for example, if the position counter shows a negative count.