DIRECT SELECT interface, component description - GF27.19-P-1300AHX

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TRANSMISSION 722.930 up to 31.5.11, 722.931 as of 1.6.11 in MODEL 212.0/2

View of DIRECT SELECT INTERFACE from above (as of YoM 11)

Fig 1: Transmission Mode Rotary Switch And AMG Buttons

Courtesy of MERCEDES-BENZ USA

Location

The DIRECT SELECT INTERFACE is in the center console.

Task

General

The DIRECT SELECT INTERFACE performs non-contact detection of the positions of the selector lever via integrated sensors with Hall elements, and detection of the status of the "P" button.

The DIRECT SELECT INTERFACE is flashable and codable.

The ME-SFI [ME] control unit (N3/10) serves as the interface between the chassis CAN (CAN E) and drive train CAN (CAN C).

Input and output signals

The DIRECT SELECT INTERFACE evaluates the following input signals and outputs the appropriate output signals:

Direct input signals
Drive train CAN input signals
Drive train CAN output signals

Direct input signals

Circuit 30 (fused)
Circuit 31

Drive train CAN input signals

Status of left front door rotary tumbler switch (A85s1), from left front door control unit (N69/1) via interior CAN (CAN B), front SAM control unit with fuse and relay module (N10/1), chassis CAN and ME-SFI [ME] control unit
Status of service brake, status of brake lights switch (S9/1) and wheel speeds, of Premium Electronic Stability Program control unit (N30/7) over chassis CAN and ME-SFI [ME] control unit
Status of circuit 15, from electronic ignition lock control unit (N73) over chassis CAN and ME-SFI [ME] control unit
On-board electrical system status and diagnostic communication, from front SAM control unit with fuse and relay module via chassis CAN and ME-SFI [ME] control unit

Drive train CAN output signals

Diagnostic communication, to front SAM control unit with fuse and relay module via ME-SFI [ME] control unit and chassis CAN
Selector lever position and status of "P" button to fully integrated transmission control unit (Y3/8n4), to ME-SFI [ME] control unit and to intelligent servo module for DIRECT SELECT (A80)
Selector lever position and status of button "P" via the ME-SFI [ME] control unit and chassis CAN at the Premium Electronic Stability Program control unit as well as at the instrument cluster (A1)

Wiring diagram for electronic transmission control (ETC) control unit

N150

PE27.19-P-2101-97DAB