GF72.29-D-0003H Power Windows (PW (EFH)), Function

GF72.29-D-0003H Power Windows (PW [EFH]), Function


Function using power window operating switch

The power windows in the driver and front passenger door are operated using the driver front power window button (S47s1) and front passenger power window button (S47s2) in the driver door control panel (S47). The power window in the front passenger door can also be operated with the passenger-side power window switch (S21/2) in the door panel of the front passenger door.

Function overview:
- Manual raising with excess force limiter (with own parameter setting)
- Manual opening
- Automatic raising with excess force limiter (with normalized windows) (except code (ZU7) National version for Canada and except code (ZU8) National version for USA)
- Automatic opening
- Centrally closing/opening via air conditioning (air recirculation button (S98s6)) (except code (ZU7) National version for Canada and except code (ZU8) National version for USA)
- Central locking/unlocking via infrared signal
When the "Comfort function" is actuated, the tilting/sliding roof (SR) is also opened (with code (D24) Electric glass tilting/sliding roof in passenger compartment or with code (D27) Electric glass tilting/sliding roof)

Function requirements:
- "Circuit 15R ON"
- No overvoltage or undervoltage

Actuation via the driver door control panel cannot be influenced by the front passenger power window switch in the door panel of the front passenger door. An activation or an already active function of another switch is interrupted, if a new request for the corresponding window is received by the driver door control panel.

Power window control commands
A power window control command with higher priority is accomplished if a power window function with lower priority is presently active. This applies only if the function requirements for the higher priority requests are fulfilled.

A lower priority power window command cannot affect an active power window function of higher priority. After a higher priority function has ended, any lower priority control command still active will be ignored. First it is necessary to recognize the non-actuated state of the low-priority control command before the corresponding function can be activated

Priority 1

The driver door control panel has the highest priority. When a power window control command is output by the driver door control panel, the first switch actuation terminates any function already activated by another power window operating switch with lower priority. The 2nd switch actuation activates the desired function.

Priority 2

The windows can be opened and closed via local operating points on the corresponding windows

Priority 3

The windows can be opened and closed centrally via the IR signal or the lock switch.
The function sequences mentioned above are realized by the driver door control unit (N69/1) and the SAM control unit (N10).

Manual raising /lowering

The manual raising/lowering function is actuated by pulling back or pushing forward a power window operating switch in the "open" or "close" direction as far as the first click-stop position.

The driver door power window motor (M10/1) or the front passenger door power window motor (M10/2) is actuated via the driver door control unit and SAM control unit as long as the switch is actuated.

Automatic raising (except code (ZU7) National version for Canada and except code (ZU8) National version for USA)

The "Automatic raising" function effects automatic window raising with excess force limitation and can only be performed on normalized windows. If no other switch position is detected, the window is fully closed as far as the upper block position. If a defective Hall sensor or an incorrect rotation direction of the driver door power window motor and the front passenger door power window motor is recognized, the automatic raising operation is interrupted.

If an error is recognized (a signal such as defective Hall sensor) the function "Manual raising" is accomplished when the request "Automatic raising" is still present. If the system recognizes the "Manual raising" function after having recognized the "Automatic raising" function without first having detected the neutral position, the "Automatic raising" function remains active.

Automatic lowering

The "Automatic lowering" function effects automatic window lowering and can be performed without normalization.

As long as no other functions are detected, the window will be fully lowered to the lower block position.

Function interruption (except code (ZU7) National version for Canada and except code (ZU8) National version for USA)

The "Automatic raising" function is interrupted if:
- Function requirements are not satisfied
- Blockage detection
- Another switch position after neutral position is detected
- Actuation of excess force limiter
- Activation > 25 s
- Zero point tolerance exceeded