Distronic (DTR) Input and Output Signals
Distronic (DTR) Input And Output Signals
A1 Instrument cluster
B29 DTR radar sensor
E3e4 Left stop lamp
E4e4 Right stop lamp
K40/4 Model 230: Front passenger-side fuse and relay module (terminal 87 voltage supply)
N3/10 ME-SFI [ME] control unit
N10/1 Models 211, 240: driver-side SAM control unit with fuse and relay module (voltage supply for terminal 87)
Model 209: front SAM control unit with fuse and relay module (voltage supply for terminal 87)
N10/8 Models 230: SAM control unit for rear passenger area
Model 240: SAM control unit with fuse and relay module for rear 2
N15/3 ETC control unit
N28/1 Models 209, 230, 240: trailer recognition control unit
Model 211: Trailer connection unit [AAG] control unit N47-5 Models 211, 230, 240: ESP, SPS and BAS control unit
Model 209: ESP and BAS control unit
N49 Steering angle sensor
N63/1 DTR control unit
N72 Lower control field control unit
N72r1 DTR distance potentiometer
N72s9 DTR switch (distance warning function)
N73 Electronic ignition switch control unit (gateway between interior compartment data bus and engine data bus)
N80 Steering column module
S40 CC switch (USA)
S40/4 CC with variable speed limiter switch (other than model 211)
Model 211: cruise control pushbutton switch
X11/4 Data link connector
CAN-B Databus for the interior
CAN-C Engine data bus
The Distronic control unit receives all the information it requires for its calculations over the CAN data bus.
The Distronic uses the engine torque and braking torque interface in the ESP control unit. All requests are first collected in the ESP control unit so that there are no conflicts with engine and brake interventions between the Distronic and ESP systems. The interventions are then executed according to their importance.
CAN input signals to the Distronic control unit (N63/1) from
ESP, SPS and BAS control unit (N4747-5)
- Left front, right front, left rear and right rear wheel speeds
- Reduction or increase of the engine nominal torque
- Distronic shutoff (if message is erroneous)
- Set braking torque
- Distronic brake intervention active
- Emergency braking (all 4 wheels regulated)
- ESP brake intervention active
- Driver braking
- Stop lamp switch
ME-SFI control unit (N3/10)
- Vehicle code
- Adjusted engine torque for traction control
- Engine speed
- Minimum and maximum engine torque, engine drag torque
- Distronic switched on
- Inertia fuel shutoff
ETC control unit (N15/3/)
- Actual gear
- Target gear
- Kick-down
- Transmission code
- ETC in limp-home mode
EIS control unit (N73)
- Country code
- Distronic (DTR) distance warning function OFF or ON (from lower control panel control unit over interior compartment CAN)
- Distronic (DTR) distance potentiometer specification (from lower control panel control unit over interior compartment CAN)
Instrument cluster (A1)
- mph instead of km/hour (variable speed limitation)
- Winter tire maximum speed
Steering column module (N80)
- Pushbutton switch for the cruise control system : "OF"
- Pushbutton switch for the cruise control system : "SET MEMORY"
- Pushbutton switch for the cruise control system : "SET ACCELERATION"
- Pushbutton switch for the cruise control system : "SET DELAY"
- Operation of variable speed limiter, except for (USA)
- Cruise control switch implausible
- Steering angle (from 0 to 720°)
- Steering angle sign (right/left)
- Steering angle sensor defective
CAN output signals from the Distronic control unit (N63/1) to
ESP, SPS and BAS control module (N47-5)
- Stop lamp suppression for minimal braking
- Distronic braking
- Distronic defective or OK
- Increase in specified engine torque
- Decrease of specified engine torque
- Distronic active
- Variable speed limiter (VSL) active, except for (USA)
Instrument cluster (A1)
- Distronic distance warning lamp
- Distronic warning tone
- Recognized stationary objects (e.g. a stationary vehicle)
- Switch display to Distronic display
- Distronic switched on (no vehicle ahead)
- Speedometers
- Switch Distronic segment display on
- Vehicle detected ahead
- Distronic switched on (proximity control active)
- "LIMIT" in display, except (USA)
- Distronic error
ETC control unit (N15/3/)
- Shift curve offset
- Suppression of dynamic full load position
- Maintain gear position
- Active downshift required
The following data is used to detect objects:
Vehicle data:
- Wheel speeds
- Steering angle
- Yaw rate
- Own speed.
Radar data:
- Distance to object
- Relative speed of object
- Angle of object
- Radar beam assignment
- Strength of reflected radar beams.