Roller sun blind, function - GF68.50-P-0004LA
MODEL 216.3 with CODE (540) Electric rear window roller blind as of model year 2009 /YoM 08
Function requirements, general
- C. 15R On
- No undervoltage or overvoltage
The status of circuit 15R is provided by the EIS [EZS] control unit (N73) on the interior CAN (CAN B).
Roller sun blind function, general
The roller sun blind consists of a vertical running roller blind without rails which operates according to the scissors principle in front of the rear window. The roller sun blind is driven by the rear roller sun blind motor (M24).
The rear roller blind motor is actuated by the rear SAM control unit with fuse and relay module (N10/2). The roller sun blind is rolled up in the open state.
Closing and opening the roller sun blind is always accomplished in the automatic mode without intermediate positions.
In the event of roller sun blind blockage, actuation is interrupted immediately or the running direction is reversed, because the rear roller blind is not equipped with Hall sensors.
An active adjustment is interrupted only after expiration of an actuation time of t = 11 s.
Operation in event of undervoltage and overvoltage:
If the on-board electrical system voltage drops during adjustment to below U = 9 V or increases to U = 16 V, new adjustment requests are ignored. A roller sun blind already in motion continues to move the end stop.
The roller sun blind function comprises the following subfunctions:
- Function sequence for opening/closing roller sun blind via freely programmable button (A40/9s10) (up to 31.5.09)
- Function sequence for opening/closing roller sun blind via rear window roller sun blind button (A40/9s13) (as of 1.6.09)
- Function sequence for opening/closing roller sun blind via rotary push-button (A40/9s11)
- Function sequence for play protection
Additional function requirements for opening/closing roller sun blind via freely programmable button (up to 31.5.09)
- Freely programmable button with corresponding function assigned
Function sequence for opening/closing roller sun blind via freely programmable button (up to 31.5.09)
The upper control panel control unit (N72/1) reads in the signal from the freely programmable button and transmits a corresponding request to the rear SAM control unit via the interior CAN.
The rear SAM control unit receives the request and directly actuates the rear roller blind motor for t = 11 s.
After another t = 2 s, the system changes from the "Closing" status to the "Opening" status and vice versa.
The front central operating unit only relays the status of the freely programmable button through the upper control panel control unit.
Function sequence for opening/closing roller sun blind via rear window roller sun blind button (as of 1.6.09)
The front central operating unit reads in the signal from the rear window roller sun blind button and transmits a corresponding adjustment request to the COMMAND control unit (A40/3) via telematics CAN (CAN A).
The COMMAND control unit provides this signal to the central CAN (CAN F). The central gateway control unit (N93) reads in the request and transmits it to the rear SAM control unit via the interior CAN.
The rear SAM control unit receives the request and directly actuates the rear roller blind motor for t = 11 s. After another t = 2 s, the system changes from the "Closing" status to the "Opening" status and vice versa.
Function sequence for opening/closing roller sun blind via rotary push-button
Select menu "Vehicle" and "Rear roller blind" function with rotary push-button and confirm.
The front central operating unit transmits the corresponding adjustment request to the COMMAND control unit via the telematics CAN.
The COMMAND control unit provides the signal to the central CAN. The central gateway control unit reads in the request and transmits it to the rear SAM control unit via the interior CAN. The rear SAM control unit receives the request and directly actuates the rear roller blind motor for t = 11 s. After another t = 2 s, the system changes from the "Closing" status to the "Opening" status and vice versa.
The status of the roller sun blind is indicated the COMMAND display (A40/8) (without code (867) SPLITVIEW) or in the SPLITVIEW display (A40/10) (with code (867) SPLITVIEW).
Function sequence for play protection
The play protection prevents the rear roller blind motor from overloading. Each time the roller sun blind is adjusted, the play protection counter is increased by the value stored in the microprocessor. If the play protection counter exceeds this value, play protection is activated and the function remains inhibited until the limit value of the play protection counter is surpassed again.
If the play protection counter is not equal to zero, it is reduced by a the value 100 each second, regardless of whether or not the system is in the non-actuated state.
| Roller sun blind, location of components | GF68.50-P-0004-01LA | |
| Electrical function schematic for roller sun blind | PE68.50-P-2052-97CAA | |
| Roller sun blind, block diagram | GF68.50-P-0004-02LA | |
| COMMAND controller unit, component description | A40/3 With code (526) COMMAND with single DVD drive (without navigation system) or with code (527) COMMAND APS with single DVD drive (with navigation system) |
GF82.85-P-3136LE |
| With code (529) HIGH Class Japan | GF82.85-P-3136LEJ | |
| With code (530) COMMAND APS USA (with navigation system) | GF82.85-P-3136LEU | |
| COMMAND display, component description | A40/8 Without code (867) SPLITVIEW |
GF54.30-P-6110LE |
| Front central operating unit, component description | A40/9 | GF54.21-P-4500LE |
| SPLITVIEW display, component description | A40/10 With code (867) SPLITVIEW |
GF54.30-P-6120LE |
| Rear SAM control unit with fuse and relay module, component description | N10/2 | GF54.21-P-6030LE |
| Upper control panel control unit, component description | N72/1 | GF54.21-P-6040LE |
| Central gateway control unit, component description | N93 | GF54.21-P-4170LE |