Fold Left/Right Outside Mirror, Function - GF88.79-P-2002FR
Model 257, 290 up to model year 2021 with code P49 (MIRROR PACKAGE)
Function requirements, general
- No overvoltage or undervoltage
Left/right folding outside mirror, general
The left outside mirror (M211) and right outside mirror (M212) can be folded in and out electrically. This can be done both automatically and manually. The left front door control unit (N69/1) has the master function during adjustment and sends corresponding requests to the right front door control unit (N69/2) via interior CAN (CAN-B).
If a new adjustment request is recognized while adjustment is in progress, the active adjustment is directly switched to the opposite direction.
The left/right outside mirror comprises the following partial functions:
- Manually folding-in/out
- Automatic folding in/out
Manually folding-in/out
The partial function manual fold-in/out comprises the following subfunctions:
- Manual folding in
- Manual folding out
Additional function requirements for manually folding in
- Outside mirror folded out
- Terminal 15 ON
- Vehicle speed below 47 km/h
The electronic ignition lock control unit (N73) sends the status of circuit 15 to left front door control unit via interior CAN.
The instrument cluster (A1) sends the vehicle speed via user interface CAN (CAN HMI), electronic ignition lock control unit and interior CAN to the left front door control unit.
Manual folding in
By pressing the outside mirror fold in/out switch (S20s6) in the driver power window and outside mirrors adjustment switch group (S20), the two outside mirror housings can be folded in (garage position).
The left front door control unit reads in the status of the outside mirror fold-in/out switch via left front door LIN (LIN B5) and transmits the request "Fold in right outside mirror" to the right front door control unit via the interior CAN. The left front door control unit then actuates the outside mirror fold-in/out electric motor (M211m3) in the left outside mirror. The right door control unit then actuates the outside mirror fold-in/out electric motor (M21/2m3) in the right outside mirror. The actuation duration is 5 s.
It is no longer possible to fold in the outside mirrors above a vehicle speed of 47 km/h.
Additional function requirements for manual fold-out
- Outside mirror folded in
- Circuit 15R ON
The electronic ignition lock control unit sends the status of circuit 15 to left front door control unit via the interior CAN.
Manual folding out
Both outside mirrors are folded to the driving position when the outside mirror fold-in/out switch is actuated.
The left front door control unit reads in the status of the outside mirror fold-in/out switch via left front door LIN and transmits the request "Fold out right outside mirror" to the right front door control unit via the interior CAN. The left front door control unit then actuates the outside mirror fold-in/out electric motor in the left outside mirror. The right front door control unit then actuates the outside mirror fold-in/out electric motor in the right outside mirror. The actuation duration is 5 s.
Additional function requirements for automatic fold-in/out
- Function activated in head unit (A26/17)
The head unit sends the status of the fold-in/out outside mirror function via user interface CAN, electronic ignition lock control unit and interior CAN to the left front door control unit.
Automatic folding in/out
The partial function automatic fold-in/out comprises the following subfunctions:
- Automatic folding in
- Automatic folding out
Additional function requirements for automatic folding in
- Outside mirror folded out
- Circuit 15C OFF
The electronic ignition lock control unit sends the status of circuit 15 to left front door control unit via the interior CAN.
Automatic folding in
When the vehicle is locked from the outside with the central locking (CL [CL]), both outside mirrors are folded in automatically (garage position).
The electronic ignition lock control unit sends the status of the central locking to the left door control unit via the interior CAN. The left front door control unit then transmits the request "Fold in right outside mirror" via the interior CAN to the right front door control unit and actuates the outside fold-in/out mirror electric motor in the left outside mirror. The right front door control unit then actuates the outside mirror fold-in/out electric motor in the right outside mirror. The actuation duration is 5 s.
Additional function requirements for automatic folding out
- Outside mirror folded in
- CL locked
Automatic folding out
When the vehicle is unlocked via the CL and then the driver door opened or when switched circuit 15, both outside mirrors are folded out automatically to the driving position.
The electronic ignition lock control unit sends the status of the central locking to the left door control unit via the interior CAN. Opening the driver door is sensed by the left front door control unit. The left front door control unit then transits the request "Fold out right outside mirror" via interior CAN to the right front door control unit and actuates the outside mirror fold-in/out electric motor in the left outside mirror. The right front door control unit then actuates the outside mirror fold-in/out electric motor in the right outside mirror. The actuation duration is 5 s.
If the outside mirrors are still folded in with circuit 15R ON by a previous automatic folding-in procedure, the mirror housings are folded out immediately.
To ensure that the outside mirrors are folded out completely, the electric motors for folding the outside mirrors in/out are actuated for another 1 s when the speed of 47 km/h is exceeded.
| Electrical function diagram for folding outside mirrors | PE88.79-P-2057-97XBA | ||
| Overview of system components for electric mirror | GF88.79-P-9996FR |