Fold left/right outside mirror, function - GF88.79-P-2002CE
MODEL 204.0 with CODE (249) Automatically dimming inside rearview mirror and outside mirror including fold-in outside mirrors as of model year 2009 except CODE (494) USA version except CODE (460) Canada version /YoM 08
MODEL 204.2 with CODE (249) Automatically dimming inside rearview mirror and outside mirror including fold-in outside mirrors as of model year 2009
MODEL 204.3 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
MODEL 204.9 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
General function requirements
- No overvoltage or undervoltage
Folding left/right outside mirror, general
The left outside mirror (M21/1) and right outside mirror (M21/2) can be folded in and out electrically.
This can be done both automatically as well as manually.
The left front door control unit (N69/1) has the master function during adjustment and relays the necessary requests to the right front door control unit (N69/2) via the interior CAN (CAN-B).
If a new adjustment request for the housing is recognized while adjustment is in progress, the adjustment is directly switched to the opposite direction.
The left/right outside mirror comprises the following partial functions:
- Manual folding in/out, function sequence
- Automatic folding in/out, function sequence
- Function sequence for automatic fold-out via speed signal
Function sequence for manual folding in/out
The partial function manual fold-in/out comprises the following subfunctions:
- Manual folding in function sequence
- Manual folding out function sequence
Additional function requirements for manually folding in
- Outside mirror folded out
- Circuit 15R ON
- Vehicle speed v < 47 km/h
The electronic ignition lock control unit (N73) transmits the circuit status circuit 15 and the vehicle speed is transmitted by the instrument cluster (A1) to the front door control units via the interior CAN.
Manual folding in function sequence
S20s9By pressing the outside mirror fold in/out switch in the driver power window and outside mirror adjustment switch group, the two outside mirror housings can be folded in (garage position). S20 The left door control unit reads in the status of the outside mirror fold-in/out switch via left door LIN (LIN B5) and transmits the it to the right door control unit via the interior CAN.
The left door control unit actuates the outside mirror fold-in/out electric motor (M21/1m3) in the left outside mirror. The right door control unit actuates the outside mirror fold-in/out electric motor (M21/2m3) in the right outside mirror.
The actuation duration of the outside mirror actuation depends on the outside temperature. At temperatures of T > 5 °C actuation is accomplished with t = 5 s, at 5 °C ≥ T > - 8 °C with t = 6 s and at T ≤- 8 °C with t = 8 s.
Additional function requirements for manual fold-out
- Outside mirror folded in
- Circuit 15R ON
Manual folding out function sequence
The mirror housing can be moved to the driving position by actuating the outside mirror fold-in/fold-out switch.
The left front door control unit reads in the status of the outside mirror fold-in/out switch via left door LIN (LIN) and transmits the it to the right door control unit via the interior CAN.
The left front door control unit actuates the outside mirror fold-in/out electric motor in the left outside mirror.
The right front door control unit actuates the outside mirror fold-in/out electric motor in the right outside mirror.
The actuation duration is t = 5 s.
Additional function requirements for automatic fold-in/out
- Function activated in instrument cluster
The instrument cluster transmits the corresponding status via the interior CAN to the SAM control units.
Automatic folding in/out, function sequence
The partial function automatic fold-in/out comprises the following subfunctions:
- Automatic folding in function sequence
- Automatic folding out function sequence
Additional function requirements for automatically folding in
- Circuit 15C OFF
Automatic folding in function sequence
When the vehicle is locked with the central locking (CL) from outside both outside mirrors are folded in automatically (garage position). The electronic ignition switch control unit sends the status of the CL over the interior CAN to the left front door control unit and the right front door control unit.
The left front door control unit actuates the outside mirror fold-in/out electric motor in the left outside mirror. The right front door control unit actuates the outside mirror fold-in/out electric motor in the right outside mirror.
The actuation duration is t = 5 s.
Detailed information on the CL is given in the separate function description "Central Locking (CL).
Additional function requirements for automatic folding out
- Outside mirror folded in
- CL locked
Automatic folding out function sequence
When the vehicle is unlocked with the CL and the driver door is opened, both mirror housings are folded out automatically (drive position).
The electronic ignition switch control unit sends the status of the CL over the interior CAN to the left front door control unit and the right front door control unit.
Opening the driver door is detected by the left front door rotary tumbler switch (A85s1) in the left front door lock (A85).
The left front door control unit directly reads in the status of the rotary tumbler switch.
The left front door control unit actuates the outside mirror fold-in/out electric motor in the left outside mirror.
The right front door control unit actuates the outside mirror fold-in/out electric motor in the right outside mirror.
The actuation duration is t = 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.
Additional function requirements for automatic fold-out via speed signal.
- Outside mirror folded in
- Status of circuit 15C changes to circuit 15 On
Function sequence for automatic fold-out via speed signal
The outside mirrors are folded out automatically when the vehicle speed v exceeds 47 km/h.
The instrument cluster transmits the vehicle speed to the door control units via the interior CAN.
The left front door control unit actuates the outside mirror fold-in/out electric motor in the left outside mirror.
The right front door control unit actuates the outside mirror fold-in/out electric motor in the right outside mirror.
The actuation duration is t = 1 s.
After exceeding a speed of v > 47 km/h is no longer possible to fold in the outside mirrors.
| Electrical function schematic for mirror folding | PE88.79-P-2053-97FAB | |
| Overview of system components for electric mirror | GF88.79-P-9996CE |