GF80.45-P-0003LA Convenience Feature (CF), Function

GF80.45-P-0003LA Convenience Feature (CF), Function

General function requirements
^ Power window and tilting/sliding roof normalized

Convenience feature, general
The convenience feature allows side windows and the tilting/sliding roof to be opened and closed centrally.
On vehicles with code (401) Front comfort seats, including seat heating and seat ventilation, the seat ventilation in the driver seat is switched to stage 3 during convenience opening.

The convenience feature comprises the following partial functions:
^ Function sequence for convenience feature via transmitter key (A8/1)
^ Function sequence for convenience feature via air recirculation function (without code (494) USA version)
^ Function sequence for convenience feature via Keyless-Go (with code (889) Keyless-Go)

Additional function prerequisites for convenience feature via transmitter key
^ C. 15C OFF
^ Doors closed

Function sequence for convenience feature via transmitter key
When the "Lock" or "Unlock" button the transmitter key is actuated for a longer period of time, it transmits a signal to the driver door infrared sensor (B58) via the interior CAN (precise aiming required). This signal is read in by the left door control unit (N69/1) and transmitted to the EIS control unit (N73) via the interior CAN. The EIS control unit checks the access authorization of the transmitter key and enables the requested function.

After enabling, the left door control unit transmits the "open" or "close" signal to the following control units via the interior CAN according to the request.
- Right door control unit (N69/2)
- Rear control unit (N22/6)
- Overhead control panel control unit (N70)
- Left front seat control unit (N32/1) (with code (401) Front comfort seats incl. seat heating and seat ventilation)

The left door control unit actuates the left front power window motor (M10/3), the right door control unit actuates the right front power window motor (M10/4), the rear control unit actuates the left rear power window motor (M10/5) and right rear power window motor (M10/6) to open and close the side window according to the request.
The overhead control panel control unit actuates the roof system drive unit (M12), to open or close the tilting/sliding roof according to the request.
On vehicles with code (401) Front comfort seats incl. seat heating and seat ventilation, the left front seat control unit (N29/5) actuates the left front seat cushion ventilation motor group (M18/9) and the left front seat backrest ventilation motor group (M18/10) via the left front seat ventilation blower regulator to switch on the seat ventilation for the drive seat to stage 3.

Additional function requirements for convenience feature via air recirculation button
- Circuit 15 On

Function sequence for convenience feature via air recirculation function
Comfort opening or closing is requested by the air recirculation switch (N72/1s37). he status of the air recirculation switch is read in by the upper control panel control unit (N72/1) and transmitted to the AAC control unit (N22/1) via the interior CAN. The AAC control unit then transmits the request to the following control units via the interior CAN:
- Door control module left
- Door control module right
- Rear control unit
- Overhead control panel control unit
- Left front seat control unit

The left door control unit actuates the left front power window motor, the right door control unit actuates the right front power window motor, the rear control unit actuates the left rear power window motor and right rear power window motor to open and close the side window according to the request.
The overhead control panel control unit actuates the roof system drive unit to open or close the tilting/sliding roof according to the request.

The convenience feature is stopped when the air recirculation button is actuated again.

When closing with the air recirculation button, the current positions of the side windows and the tilting/sliding roof are stored. The next time the air recirculation button is pressed the windows are moved to the previously stored positions.

Additional function requirements for convenience feature via KEYLESS-GO
^ Circuit 15 Off
^ A transmitter key is located outside of the vehicle and in the vicinity (s = 1 m) of the actuated left comfort sensor (B67/1b1) or actuated right comfort sensor (B67/2b1)
^ Doors closed and vehicle locked
^ Touching comfort sensor on outside of door handle for t > 1,5 s

A request to determine the position of the transmitter key is transmitted to the KEYLESS-GO trunk antenna (A2/35), left door KEYLESS-GO antenna (A2/39) and right door KEYLESS-GO antenna (A2/41). The transmitter key then transmits its position to the rear window antenna amplifier module (A2/12) which is read in by the KEYLESS-GO control unit (N69/5).

Function sequence for convenience feature via KEYLESS-GO
When touching the comfort sensor, it transmits a signal to the KEYLESS-GO control unit. The KEYLESS-GO control unit transmits the signal "Comfort closing" to the following control units via the interior CAN:
- Door control module left
- Door control module right
- Rear control unit
- Overhead control panel control unit
- Left front seat control unit

The left door control unit actuates the left front power window motor, the right door control unit actuates the right front power window motor, the rear control unit actuates the left rear power window motor and right rear power window motor to open and close the side windows.
The overhead control panel control unit actuates the roof system drive unit to close the tilting/sliding roof.

Convenience closing is interrupted in the following cases:
- when another comfort sensor is touched,
- when the comfort sensor is no longer touched,
- After max. t = 90 s
- If another central locking command is present

The convenience function is a manual closing function, i.e. the comfort sensor must be touched during the entire closing procedure; when the sensor is released, the procedure is stopped.

If, during comfort closing or max. t = 2 s after the same KEYLESS-GO door handle is pulled, the emergency opening function activated. In this case, the side windows, the tilting/sliding roof are actuated in the opening direction. Actuation is performed for min. t = 2 s or as long as the KEYLESS-GO door handle is pulled, max. t = 90 s.