GF28.19-P-3200G Component Description of Transfer Case Control Unit

GF28.19-P-3200G Component Description of Transfer Case Control Unit
MODEL 463.306 /336 /346 up to 31.5.12 with TRANSFER CASE 750.654 as of model year 2011 /YoM 10
MODEL 463.202 /222 /236 /237 /270 /271 /303 /340 /341 up to 31.5.12 with TRANSFER CASE 750.654 as of model year
2009/YoM 08





N15/7 VGS control unit

Location
The fully integrated transmission control (VGS) control unit is located in the area of the center console.

Task
The fully integrated transmission control (VGS) control unit controls the whole transfer case shift operation.
This task is split up as follows:
^ Reading in of sensors and signals
^ Evaluation of input factors
^ Actuation of components

Reading in of sensors and signals
The input factors are read in via the following connections:
^ Direct line
^ Drive train CAN (CAN C)

Direct line
The following information is read in over a direct line:
- Terminal 30
- Terminal 31
- Terminal 15
- Differential lock switch group status (S76)
- Transfer case switch status (S97/5)
- Transfer case actuator motor position (M46/2)

Drive train CAN
The following information is read in over the drive train CAN:
- Engine speed from CDI control unit (N3/9) (with diesel engine) or from ME-SFI control unit (N3/10) (with gasoline engine)
- Selector lever position from electronic selector lever module control unit (N15/5)
- Vehicle speed from instrument cluster (A1)
- Gear engaged by EGS control unit (N15/3) (with transmission 722.6) or from fully integrated transmission control unit (VGS) (Y3/8n4) (with transmission 722.9)

Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components
Components are actuated with the following line:
^ Direct line

Direct line
The following component is actuated via a direct line:
- Transfer case actuator motor

The fully integrated transmission control (VGS) control unit also forwards its status and any faults over the drive train CAN. For diagnostic purposes a direct connection also exists to the data link connector (X11/4).