GF77.30-P-2004SK Open/Close Vario Roof, Function

GF77.30-P-2004SK Open/Close Vario Roof, Function
- up to model year 08

Component Identification:

Function requirements
^ Circuit 15 ON
^ Status of Vario roof recognized (determination of Vario roof position)
^ No overvoltage or undervoltage
^ Temperature of soft top mechanism hydraulic unit (A7/5) in valid range for corresponding actuation direction and type of actuation
^ Vario roof actuators (soft top mechanism hydraulic unit (A7/5) and cylinder) okay
^ Speed signal < 5 km/h
^ Trunk lid closed
^ Trunk partition closed

These function prerequisites are checked during the entire Vario roof opening or closing operation.If one of these function prerequisites is no longer fulfilled or in the event of failure of a CAN message for > 50 ms, the Vario roof is interrupted immediately.

Function
When opening or closing the Vario roof the side windows are also included in the operation by desmodromic valve control Desmodromic valve control means that first the side windows are lowered when the Vario roof is opened and then the Vario roof itself is opened.During the closing, the Vario is closed first and then the windows are moved up Desmodromic valve control of the side windows with the Vario roof prevents damaging the Vario roof operation resulting from collision.
When the Vario roof actuation switch (S84s1) is actuated and held down, the Vario roof is opened or closed.The opening or closing actuation request of the Vario roof actuation switch (S84s1) is read in by the upper control panel control unit (N72/1) and transmitted to the power soft top control unit (N52) via CAN B (CAN) The signal is transmitted to the left door control unit (N69/1) and right door control unit (N69/2) by the power soft top control unit (N52) via CAN B (CAN) in order to actuate the left front power window motor (M10/3) and right front power window motor (M10/4).

The left rear power window motor (M10/5) and right rear power window motor (M10/6) are actuated directly by the power soft to control unit (N52).
In addition the soft top mechanism hydraulic unit (A7/5) is actuated by the power soft top control unit (N52) and the Vario roof is closed or opened hydraulically.
The power soft top control unit (N52) forms the central unit in the Vario roof system (VR) receiving, transmitting and relaying signals The signals are transmitted via CAN B (CAN) or transmitted or received directly.

Search function of power soft top control unit (N52)
The search function is started when an actuation request for the Vario roof is received.The power soft top control unit (N52) recognizes the position of the Vario roof via the search function.For this purpose all limit switches (S69, S69/3, S69/10, S69/11, S118, S119) and the rotary tumbler/trunk lid microswitch (S88/1) are read in.This determines whether the Vario roof is opened, closed or in a valid intermediate position.If no plausible Vario roof position is recognized, the Vario roof operation is interrupted and the corresponding warning message appears in the instrument cluster (A1).

Signals via CAN B (CAN) to and from power soft top control unit (N52)
^ Terminal status via EIS control unit (N73)
^ Vario roof actuation switch (S84s1) via upper control panel control unit (N72/1)
^ Left front power window motor (M10/3) via the left door control unit (N69/1)
^ Right front power window motor (M10/4) via the right door control unit (N69/2)
^ Vario roof closed limit switch (left pin) (S69) via overhead control panel control unit (N70)
^ Rotary tumbler/trunk lid microswitch (S88/1) via rear SAM control unit with fuse and relay module (N10/2)
^ Outside temperature indicator temperature sensor (B14) via driver-side rear SAM control unit with fuse and relay module (N10/1)
^ Wheel speed via gateway central control unit (N93)
^ Speed signal via instrument cluster (A1)
^ Function and warning display to instrument cluster (A1)

Direct signals by power soft top control unit (N52)
^ to left rear power window motor (M10/5),
^ to right rear power window motor (M10/6),
^ via Vario roof open relay (A7/5k1) or Vario roof close relay (A7/5k2) to soft top mechanism hydraulic unit (A7/5).

Direct signals to power soft top control unit (N52)
^ from Vario roof locked limit switch (right rotary tumbler) (S69/3),
^ from trunk partition closed limit switch (S69/10),
^ from Vario roof up/down limit switch (S69/11),
^ from tubular frame locked limit switch(S118),
^ from tubular frame open limit switch (S119),
^ from soft top mechanism hydraulic unit (A7/5) (only in event of excessive temperature)