Passenger-side outside mirror park position, function - GF88.79-P-2006RF

Model 205, 253 with code 275 (Memory package)

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

To define the park position of the right outside mirror, first select right outside mirror. Then engage reverse gear, then the right outside mirror can be adjusted.

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

The reverse gear engaged status is defined as follows:

On vehicles with transmission 722, 724, 725:
Gear range "R" is engaged through the fully integrated transmission control unit (Y3/8n4). The fully integrated transmission control unit then sends the status of the gear range via drive train CAN (CAN C1), powertrain control unit (N127) chassis FlexRay (Flex E) to the electronic ignition lock control unit.
In vehicles with transmission 716:
Engaging the reverse gear is recorded by the manual transmission main shifter shaft position sensor. The CDI control unit (N3/9) (diesel engine) or the ME-SFI [ME] control unit (N3/10) (gasoline engine) directly reads in the signals of the manual transmission main shifter shaft position sensor and sends the "Reverse gear engaged" signal via drive train CAN, powertrain control unit and chassis FlexRay to the electronic ignition lock control unit.

The electronic ignition lock control unit uses the incoming information to generate the "Reverse gear engaged" status that is independent of the transmission variant and sends it 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 (S22s7) in the left front seat adjustment switch group (S22).

Storing the park position is performed by actuating the left front memory function switch. After briefly pressing the left front memory function switch and then pressing the outside mirror adjustment switch in any direction within t = 3 s, the current position of the right outside mirror is stored in the right front door control unit as park position. The left front door control unit reads in the corresponding status via left door LIN and transmits the request "Store passenger 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 reverse gear is engaged for t > 0.6 s, the park position of the right outside mirror is moved to.

The reverse gear engaged status is defined as follows:

On vehicles with transmission 722, 724, 725:
Gear range "R" is engaged through the fully integrated transmission control unit. The fully integrated transmission control unit then sends the status of the gear range via drive train CAN, powertrain control unit and the chassis FlexRay to the electronic ignition lock control unit.
In vehicles with transmission 716:
Engaging the reverse gear is recorded by the manual transmission main shifter shaft position sensor. The CDI control unit or the ME-SFI control unit reads in the signal of the manual transmission main shifter shaft position sensor directly and transmits the signal "Reverse gear engaged" to the electronic ignition lock control unit via the drive train CAN, the powertrain control unit and the chassis FlexRay.

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 back to the original position when one of the following conditions is fulfilled:

Circuit 15 OFF
Signal "Reverse gear not engaged" is not present for t = 10 s
Vehicle speed v > 15 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-2054-97FBA
	Overview of system components for electric mirror		GF88.79-P-9996RF