Mirror lens adjustment left/right outside mirror, function - GF88.79-P-2008RF

Model 205, 253 

Function requirements, general 

• No overvoltage or undervoltage
• Circuit 15R ON or run-on active
• Storage of mirror glass position not active

The electronic ignition lock control unit (N73) transmits the circuit status of circuit 15R via the interior CAN (CAN B) to the left front door control unit (N69/1).

Run-on:

If circuit 15R is switched off, the mirror glass adjustment function is still active for t = 180 s. If a change occurs during the run-on time to the circuit status (e.g. from "Circuit 15C ON" after Circuit 15C OFF") or if a door status changes, the run-on time starts again. Even in the event of a change in the door status or a change in the circuit status after an optional amount of time, the run-on phase starts again, which means that even prior to driving off, the mirror glass positions can be adjusted after opening a door without switching on circuit 15R for t = 180 s.

Mirror lens adjustment left/right outside mirror, general 

The mirror glass in the left outside mirror (M211) and right outside mirror (M212) can be adjusted electrically.

The left/right outside mirror glass adjustment comprises the following partial functions:

• Adjust mirror glass function sequence 
• Function sequence for storing/calling up mirror glass position (with CODE 275 (Memory package)) 

Adjust mirror glass function sequence 

The corresponding outside mirror is selected via the left outside mirror adjustment switch (S20s7) or the right outside mirror adjustment switch (S20s8) in the driver side power window and outside mirror adjustment switch group (S20). The selected outside mirror is indicated by an LED in the corresponding outside mirror adjustment switch. The selected outside mirror can be adjusted to the desired position with the outside mirror adjustment switch S20s9. The position can be adjusted horizontally and vertically.

The left front door control unit reads in the corresponding status via left front door LIN (LIN B5) and transmits the request "Outside mirror actuator motor) for the right outside mirror via the interior CAN to the right front door control unit (N692). At the same time, the left front door control unit sends a corresponding signal for visual feedback via the LED in the corresponding outside mirror adjustment switch via left front door LIN to the driver side power window and outside mirror adjustment switch group.

The left front door control unit actuates the vertical inclination adjustment actuator motor (M21/1m1) and horizontal inclination adjustment actuator motor (M21/1m2). The right front door control unit actuates the vertical inclination adjustment actuator motor (M21/2m1) and horizontal inclination adjustment actuator motor (M21/2m2).

Function sequence for storing/calling up mirror glass position (with CODE 275 (Memory package)) 

The storing/calling up mirror glass position function comprises the following subfunctions:

• Store mirror glass position function sequence 
• Retrieve mirror glass position function sequence 

Store mirror glass position function sequence 

There are two buttons for storing with the left front seat adjustment switch group (S22):

• Press and hold down left front memory function switch (S22s7). Then press left front memory switch 1 (S22s8), left front memory switch 2 (S22s9) or left front memory switch 3 (S22s10).
• Press left front memory function switch for t > 100 ms. Then press left front memory switch 1, left front memory switch 2 or left front memory switch 3 within t = 0.2 to 3 s.

The left front door control unit reads in the status of the respective memory switch via the left front door LIN and sends the "Store memory position" request via the interior CAN to the driver seat control unit (N32/1). The driver seat control unit sends the request to store the mirror glass position to the left front door control unit and the right front door control unit via the interior CAN.

The position of the outside mirror is stored in the left front door control unit and right front door control unit based on the signals from the following potentiometers:

• Vertical inclination adjustment potentiometer (M21/1r2)
• Horizontal inclination adjustment potentiometer (M21/1r3)
• Vertical inclination adjustment potentiometer (M21/2r2)
• Horizontal inclination adjustment potentiometer (M21/2r3)

The corresponding front door control unit directly reads in the signals from the corresponding potentiometers.

Parallel to this the position of the driver seat and steering column is stored in the driver sear control unit.

Successful storage is confirmed by an acknowledgment tone from the instrument cluster (H461).

The driver seat control unit sends the request to output an acknowledgment tone via the interior CAN, electronic ignition lock control unit and user interface CAN (CAN HMI) to the instrument cluster (A1), which actuates the instrument cluster speaker directly.

Retrieve mirror glass position function sequence 

A stored mirror position can be called up via one of the memory switches. For this purpose, one of the memory switches must be pressed until the stored position is reached.

The left front door control unit reads in the status of the respective memory switch via the left front door LIN and sends the "Adopt memory position" request via the interior CAN to the driver seat control unit. The driver seat control unit sends the request to store the mirror glass position to the left front door control unit and the right front door control unit via the interior CAN.

The left front door control unit actuates the vertical inclination adjustment actuator motor and the horizontal inclination adjustment actuator motor.

The right front door control unit actuates the vertical inclination adjustment actuator motor and the horizontal inclination adjustment actuator motor.

	Electrical function schematic for mirror lens adjustment		PE88.79-P-2051-97FBA
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