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

TRANSMISSION 722.931 in MODEL 218 

Top view of DIRECT SELECT INTERFACE 

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.

Flash programming 

The DIRECT SELECT INTERFACE is flashable, i.e. the complete control unit software can be changed (updated). The software required to program the control units is stored on the Star Diagnosis software DVD.

CAN data bus 

The DIRECT SELECT INTERFACE is connected over the drive CAN (CAN C) and the chassis CAN (CAN E) to the vehicle's CAN network and exchanges data with other control units.

Input and output signals 

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

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

Direct input signals 

• Circuit 30 (fused)
• Circuit 31

Direct output signals 

• None

CAN input signals 

Front SAM control unit with fuse and relay module (N10/1) 

• Status of left front door rotary tumbler switch (A85s1)
• On-board electrical system status and diagnosis communication

Electronic Stability Program control unit (N30/4) (except code (233) DISTRONIC PLUS) or from the Premium Electronic Stability Program control unit(N30/7) (with code (233) DISTRONIC PLUS) 

• Service brake, status
• Status of brake light switch (S9/1)
• Wheel speeds

Electronic ignition lock control unit (N73) 

• Circuit 15 status

CAN output signals 

Front SAM control unit with fuse and relay module (N10/1) 

• Diagnosis communication

Control unit for fully integrated transmission control (Y3/8n4) 

• Selector lever position
• Status of "P" button

ME-SFI [ME] control unit (N3/10) 

• Selector lever position
• Status of "P" button

Intelligent servo module for DIRECT SELECT (A80) 

• Selector lever position
• Status of "P" button

Electronic Stability Program control unit (except code (233) DISTRONIC PLUS) or to the Premium Electronic Stability Program control unit (with code (233) DISTRONIC PLUS) 

• Selector lever position
• Status of "P" button

Instrument cluster (A1) 

• Selector lever position
• Status of "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).

Wiring diagram for electronic transmission control (ETC) control unit

N150

PE27.19-P-2101-97XAB