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

GF88.79-P-2002CE Fold Left/right Outside Mirror, Function
- with CODE (249) Automatically dimming inside rearview mirror and outside mirror including fold-in outside mirrors
- except CODE (494) USA version
- except CODE (460) Canada version
- as of model year 09


Function requirements, general
^ C. 15R On
^ Function in instrument cluster (A1) configured

The electronic ignition switch control unit (N73) transmits the circuit status c. 15 to the interior CAN (CAN B).

Folding left/right outside mirror function sequence, general
The outside mirror housings can be folded in and out electrically in pairs. This can be done both automatically as well as manually.

The fold left/right outside mirror function comprises the following subfunctions:
^ Manual folding in/out, function sequence
^ Automatic folding in/out, function sequence
^ Function sequence for automatic fold-out via speed signal

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 left front door control unit (N69/1) has the master function during the adjustment and relays the necessary signals to the right front door control unit (N69/2).

The actuation duration of the outside mirror depends on the outside temperature. At a temperature of T > 5 °C it is switched on for
t = 5 s, at 5 °C ≥ T > - 8 °C for t = 6 s and at T ≤ - 8 °C for t = 8 s.

Manual folding in/out, function sequence
Manual folding in/out comprises the following subfunctions:
^ Manual folding in function sequence
^ Manual folding out function sequence

Additional function requirements for manually folding in
^ Last actuation was folding out
^ Vehicle speed v < 47 km/h

Manual folding in function sequence
When the outside mirror fold-in/out switch (S20s9) is actuated, the mirror housings can be folded to the garage position. The corresponding adjustment request from the outside mirror fold-in/ out switch is read in by the left front door control unit via left door LIN (LIN B5).
The left front door control unit actuates the outside mirror fold-in/ out electric motor (M21/1m3) in the left outside mirror (M21/1) and the right front door control unit actuates the outside mirror fold-in/ out electric motor (M21/2m3) in the right outside mirror (M21/2).

Additional function requirements for manual folding out
^ Last actuation was folding in

Manual folding out function sequence
When the outside mirror fold-in/out switch () is actuated, the mirror housings can be folded to the drive position.

The corresponding adjustment request from the outside mirror fold-in/out switch is read in by the left front door control unit via left door LIN.
The left front door control unit actuates the outside mirror fold-in/ out electric motor in the left outside mirror and the right front door control unit actuates the outside mirror fold-in/out electric motor in the right outside mirror.

Automatic folding in/out, function sequence
Automatic folding in/out comprises the following subfunctions:
^ Automatic folding in
^ Automatic folding out

Additional function requirements for automatic folding in
^ Circuit 15R Off
^ Function activated in instrument cluster

Automatic folding in function sequence
When the vehicle is locked with the central locking (CL) from outside with the transmitter key (A8/1) both mirror housings are folded in automatically (garage position).

If the mirror housings were manually adjusted to the garage position, the mirror housings are not adjusted via the automatic adjustment

Additional function requirements for automatic folding out
^ C. 15R On
^ Driver or passenger door opened for t > 600 ms

Automatic folding out function sequence
When the vehicle is unlocked from outside with the central locking (CL) transmitter key, both mirror housings are automatically folded out to the previous position (driving position).
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.

Additional function requirements for automatic fold-out via speed signal.
^ Circuit 15 On
^ Vehicle speed v > 47 km/h

The instrument cluster transmits the vehicle speed via the interior CAN.

Function sequence for automatic fold-out via speed signal
If the mirrors are not folded out while driving after folding in manually, an automatic request "Fold out mirror housing via speed signal" is transmitted to the mirror housing starting at a speed of v > 47 km/h.

After exceeding a speed of v > 47 km/h is no longer possible to fold in the outside mirrors.

After resetting c. 30 the mirrors are moved in the fold-out direction the first time the mirror housing is actuated.