Component Description For Steering Column Tube Module Control Unit - GF54.21-P-6051GN
Model 166
as of Model year 2016
Model 292
Shows Model 166.0
Location
The steering column tube module control unit is located directly behind the multifunction steering wheel (MFL) on the steering column tube of the steering column.
Tasks
The steering column tube module control unit has the following tasks:
- Reading in of signals
- Evaluation of input factors
- Actuation of components
- Sending signals
Reading in of signals
The input factors are read in over the following connections:
- Direct line
- Steering LIN (LIN E1)
- Chassis CAN 1 (CAN E1)
Direct line
The signals from the following components are read via direct lines:
- Steering wheel angle sensor (N49)
- Combination switch (S4)
- DIRECT SELECT lever (S16/13)
- Cruise control lever (S40/4)
- Resume from memory switch (S40/4s1)
- Decelerate and set switch (S40/4s2)
- Accelerate and set switch (S40/4s3)
- OFF switch (S40/4s4)
- SPEEDTRONIC switch (S40/4s6) (without CODE 494 (USA version))
- DISTRONIC control (S40/4r1) (with code 239 (DISTRONIC PLUS) or with code 266 (DISTRONIC PLUS with Steer Assist and Stop & Go Pilot))
- Steering column adjustment switch (S59) (with CODE 275 (Memory package))
Steering LIN
The steering wheel electronics (N135) directly reads in the signals for the following components and sends them over the steering LIN to the steering column tube module control unit:
- Left multifunction steering wheel button group (S110)
- Steering wheel downshift button (S110/1)
- Right multifunction steering wheel button group (S111)
- Steering wheel upshift button (S111/1)
Chassis CAN 1
The steering column tube module control unit reads in the following signals, among other things, via chassis CAN 1:
- Circuit 15 status
- Circuit 58d status (switch and controls illumination)
- Request to actuate steering wheel vibration motor (M99)
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
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:
- Steering LIN
- Direct line
Steering LIN
The steering wheel electronics actuates the following components directly. The signals for this are received via the steering LIN from the steering column tube module control unit:
- Multifunction steering wheel button groups (symbol illumination)
- Steering wheel vibration motor (with CODE 238 (Active Lane Keeping Assist))
Direct line
The following component is actuated via a direct line:
- SPEEDTRONIC light-emitting diode (S40/4v1) (not with CODE 494 (USA version))
The following components are actuated directly via looped lines by the supplemental restraint system control unit (N210):
- Driver airbag squib 1 (R12/13)
- Driver airbag squib 2 (R12/14)
Sending signals
The steering column tube module control unit sends the following signals, among other things, via chassis CAN 1:
- Steering wheel angle, steering wheel velocity
- Multifunction steering wheel button group status
- Combination switch, status
- Steering wheel gearshift button status
- DIRECT SELECT lever status
- CRUISE CONTROL lever
- Steering column adjustment switch status (with CODE 275 (Memory package))
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).