Drivetrain Control Unit, Component Description - GF54.21-P-2141RF
Engine 276.8 in model 205, 253
Shown: Model 205.0
Location
The powertrain control unit is fastened to the partition wall to the engine compartment in the front passenger footwell.
Tasks
The powertrain control unit acts as an interface (gateway) between the ME-SFI [ME] control unit (N3/10) and the CAN network and it is responsible for the following tasks:
- Reading in of signals
- Output of signals and activation of components
Apart from this, the powertrain control unit acts as an interface between the connected CAN bus systems.
Reading in of signals
The powertrain control unit reads the input signals via the following connections:
- Direct line
- Drive-train-LIN (LIN C3)
- Engine CAN (CAN C)
- Drive train CAN (CAN C1)
- Suspension FlexRay (Flex E)
The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.
Output of signals and activation of components
The powertrain control unit sends output signals via the following connections:
- Direct line
- Drivetrain LIN
- Engine CAN
- Drive train CAN
- Chassis FlexRay
The electronic ignition lock control unit (N73) is the central interface (gateway) for exchanging the function-relevant data of the control units that are connected to the various CAN bus systems.
| Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
|---|---|---|
| Low temperature circuit temperature sensor (B10/13) | - | - |
| Input factors over engine CAN | Output factors over engine CAN | Supplemental information |
|---|---|---|
| ME-SFI [ME] control unit (N3/10) | ME-SFI [ME] control unit (N3/10) | - |
| Input factors over drive CAN | Output factors over drive CAN | Supplemental information |
|---|---|---|
| ME-SFI [ME] control unit (N3/10) | ME-SFI [ME] control unit (N3/10) | - |
| Fuel system control unit (N118) | Fuel system control unit (N118) | - |
| Fully integrated transmission control unit (Y3/8n4) | Fully integrated transmission control unit (Y3/8n4) | - |
| Input factors over drivetrain LIN | Output factors over drivetrain LIN | Supplemental information |
|---|---|---|
| Radiator trim flap actuator (M2/37) | Radiator trim flap actuator (M2/37) | With code P23 (EXCLUSIVE exterior), except code 239 (DISTRONIC PLUS), except code 23P (Driving Assistance Package) |
| Fan motor (M4/7) | Fan motor (M4/7) | - |
| Low-temperature circuit circulation pump 1 (M43/6) | Low-temperature circuit circulation pump 1 (M43/6) | - |
| Input factors over suspension FlexRay | Initial parameters over suspension FlexRay | Supplemental information |
|---|---|---|
| Electronic Stability Program control unit (N30/4) | Electronic Stability Program control unit (N30/4) | - |
| AIRmatic control unit (N51/3) | AIRmatic control unit (N51/3) | Model 205 with code 483 (ADVANCED AGILITY package) and code 489 (AIRMATIC) |
| AIR BODY CONTROL control unit (N51/3) | AIR BODY CONTROL control unit (N51/3) | Model 253 with code 489 (AIR BODY CONTROL) |
| Radar sensors control unit (N62/1) | Radar sensors control unit (N62/1) | Model 205 up to model year 2019 with code 23P (Driving Assistance Package), model 253 with code 23P (Driving Assistance Package) |
| Mercedes-Benz Intelligent Drive control unit (N62/4) | Mercedes-Benz Intelligent Drive control unit (N62/4) | Model 205 as of model year 2019 with code 23P (Driving Assistance Package) |
| Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | - |
| Steering column tube module control unit (N80) | Steering column tube module control unit (N80) | - |
Variants
The powertrain control unit variants such as, e.g. national, exhaust and function variants, are activated with XENTRY Diagnostics using variant coding.
| Wiring diagram for powertrain control unit | Engine 276.8 in model 205 up to model year 2019Engine 276.8 in model 253 | PE54.21-P-2141-97FBA | |
| Engine 276.8 in model 205 as of model year 2019 | PE54.21-P-2141-97FBB |