Passenger-Side Outside Mirror Park Position, Function - GF88.79-P-2006LF

Model 217 

Model 222 

with code 275 (Memory Package (driver's seat, steering column and mirror)) 

Function requirements, general 

• No overvoltage or undervoltage
• Function in instrument cluster (A1) enabled
• Circuit 15R ON

The circuit 15 status is sent by the electronic ignition lock control unit (N73) over the interior CAN (CAN B) to the right front door control unit (N69/2).

The instrument cluster transmits the status "Passenger side outside mirror park position function" to the right front door control unit via user interface CAN (CAN HMI), electronic ignition lock control unit and interior CAN.

Passenger-side outside mirror park position, general 

It is possible to save a park position of the right outside mirror (M21/2) and call it up electrically when the car is shifted into reverse, allowing the driver to see the curb.

The passenger-side outside mirror park position function includes the following subfunctions:

• Store park position function sequence 
• Function sequence for calling park position 
• Function sequence for calling drive position 

Store park position function sequence 

In order to define the park position of the right outside mirror, the right outside mirror must first be selected, then reverse gear "R" must be engaged and finally the right outside mirror must be set.

The right outside mirror is selected by actuating the right outside mirror adjustment switch (S20s8) in the driver side power window and outside mirror adjustment switch group (S20).

Gear range "R" is engaged through the fully integrated transmission control unit (Y3/8n4). The fully integrated transmission control unit then sends the "Gear range R engaged" status to the electronic ignition lock control unit over the drive train (CANC1), drive train control unit (N127) and chassis FlexRay (Flex E) to the electronic ignition lock control unit. The microprocessor for controlling the central gateway functions in the electronic ignition lock control unit uses the incoming information to generate the signal "Reverse gear engaged" and sends this via interior CAN to the right front door control unit.

The right outside mirror is adjusted by actuating the outside mirror adjustment switch (S20s9). The left front door control unit (N69/1) reads in the selection and requests for adjusting via left front door LIN (LIN B5) and transmits the corresponding requests to adjust the right outside mirror to the right front door control unit via the interior CAN. The right front door control unit then actuates the vertical inclination adjustment actuator motor (M21/2m1) and horizontal inclination adjustment actuator motor (M21/2m2) accordingly.

The right front door control directly reads in the signals from the vertical inclination adjustment potentiometer (M21/2r2) and horizontal inclination adjustment potentiometer (M21/2r3), evaluates them and automatically stores the current position of the right outside mirror as the park position.

The park position of the right outside mirror can be stored additionally and manually via the left front memory switch function (S22s6) in the left front seat adjustment switch group (S22).

Storing the park position is performed by actuating the left front memory function switch. After momentarily pressing the left front memory function switch and then actuating the outside mirror adjustment switch in any direction within t = 3 s, the current position of the right outside mirror in the right front door control unit is stored as park position. The left front door control unit reads in the corresponding requests via left door LIN and transmits the request "Store right outside mirror park position" to the right front door control unit via the interior CAN.

Manual adjustment of the right outside mirror in the park position is stored as new park position.

Function sequence for calling park position 

When the gear range "R" is engaged for t > 0.6 s, the park position of the right outside mirror is called up.

Gear range "R" is engaged through the fully integrated transmission control unit. The fully integrated transmission control unit then sends the "Gear range R engaged" status to the electronic ignition lock control unit over the drive train CAN, powertrain control unit and chassis FlexRay. The microprocessor for controlling the central gateway functions in the electronic ignition lock control unit uses the incoming information to generate the signal "Reverse gear engaged" and sends this via interior CAN to the right front door control unit.

The right front door control unit then actuates the vertical inclination adjustment actuator motor and horizontal inclination adjustment actuator motor until the park position is reached. The mirror glass position is recognized using the data of the vertical inclination adjustment actuator motor and horizontal inclination adjustment actuator motor.

Function sequence for calling drive position 

The right outside mirror is automatically moved to the driving position when one of the following conditions is met:

• Circuit 15 OFF
• Signal "Reverse gear R engaged" is not present for t = 10 s
• Vehicle speed v > 10 km/h
• Right outside mirror adjustment switch not actuated

The instrument cluster sends the vehicle speed to the left front door control unit via user interface CAN, electronic ignition lock control unit and interior CAN.

The driving position is resumed even when the right outside mirror is adjusted manually via the outside mirror adjustment switch.

	Electrical function schematic for passenger-side outside mirror park position		PE88.79-P-2054-97SEA
	Overview of system components for electric mirror		GF88.79-P-9996LF