GF88.79-P-2002LE Fold Left/Right Outside Mirror, Function

GF88.79-P-2002LE Fold Left/right Outside Mirror, Function
- as of model year 09

Function requirements, general
^ Mirror glass adjustment not active
^ On-board electrical system consumer shutoff not active

Folding left/right outside mirror, general
The outside mirror housings can be folded in and out electrically in pairs. This can be done both automatically as well as manually. If circuit 15R is switched off during an active housing adjustment, the housing adjustment is nevertheless completed.

If a new housing adjustment request is recognized during an active housing adjustment, the housing adjustment is directly switched to the opposite direction.

The fold left/right outside mirror function comprises the following subfunctions:
^ Manual folding in/out, function sequence
^ Automatic folding in/out, function sequence

Additional function requirements for manual folding in and out
^ C. 15R On
^ Vehicle speed v < 47 km/h

Manual folding in/out, function sequence
When the outside mirror fold-in/out switch (S20/1s9) in the driver outside mirror and trunk lid power window switch group (S20/1) is pressed momentarily, the mirror housings folded in (garage position) or folded out (driving position).
The corresponding adjustment request is read by the left front door control unit (N69/1) (model 221) or left door control unit (N69/1) (model 216) via the front door LIN.
The left door control unit takes over the master function during adjustment and relays the signals to the right front door control unit (N69/2) (model 221) or right door control unit (N69/2) (model 216) via the interior CAN.

The left door control unit actuates the power folding mirror motor (M21/1m3) in the left electrically adjustable and heated outside mirror (M21/1) and the right door control unit actuates the power folding mirror motor (M21/2m3) in the right electrically adjustable and heated outside mirror (M21/2).
The mirror fold-in function is no longer possible at a vehicle speed of v ≥ 47 km/h.
The instrument cluster (A1) transmits the vehicle speed signal via the central CAN to the central gateway control unit (N93), which relays the signal to the left door control unit via the interior CAN.

Additional function requirements for automatic folding in and out
^ C. 15C OFF
^ Function in COMMAND controller unit (A40/3) activated
^ Mirror housing actuated last in folding out direction (with fold-in function)
^ Mirror housing previously folded in automatically (with fold-out function)

Automatic folding in/out, function sequence
When the vehicle is locked using the central locking system (CL [ZV]) from the outside with the transmitter key (A8/1), both mirror housings are folded in automatically.
The mirror housings are folded out again the next time the CL is unlocked and the driver or passenger door is opened.

The status of the driver door is sensed by the left front rotary tumbler switch (A85s1) (model 221) or right rotary tumbler switch (A85s1) (model 216). The signal from the left rotary tumbler switch is read in by the left door control unit.
The status of the passenger door is sensed by the right front rotary tumbler switch (A85/1s1) (model 221) or right rotary tumbler switch (A85/1s1) (model 216). The signal from the right rotary tumbler switch is read in by the right door control unit.

If the mirror housings are still folded in with circuit 15R ON by a previous automatic folding-in procedure, the mirror housings are folded out immediately.

If the mirror housings were folded in manually prior to that, the mirror housings are not actuated via the automatic adjustment.