Drivetrain Control Unit, Component Description - GF54.21-P-2141MNA
Engine 177.9 in model 205, 253
Engine 177.9 in model 213 up to model year 2021
Shown: Model 205.0
Location
The powertrain control unit is located in the front passenger footwell and it is fastened to the engine compartment's partition wall.
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)
- Exhaust LIN (LIN C4)
- Engine CAN (CAN C)
- Drive train CAN (CAN C1)
- Periphery CAN (CAN PER)
- 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
- Exhaust LIN
- Engine CAN
- Drive train CAN
- Peripherals 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 from | Output factors over a direct line to | Supplemental information |
|---|---|---|
| Low temperature circuit temperature sensor (B10/13) | - | - |
| Accelerator pedal sensor (B37) | - | Model 213 |
| Input factors over drivetrain LIN from | Output factors over drivetrain LIN to | Supplemental information |
|---|---|---|
| Fan motor (M4/7) | Fan motor (M4/7) | |
| Low-temperature circuit circulation pump 1 (M43/6) | Low-temperature circuit circulation pump 1 (M43/6) | - |
| Low temperature circuit circulation pump 2 (M43/7) | Low temperature circuit circulation pump 2 (M43/7) | - |
| Low temperature circuit circulation pump 3 (M43/8) | Low temperature circuit circulation pump 3 (M43/8) | Model 213, 253 |
| Low-temperature circuit switchover valve (Y73/1) | Low-temperature circuit switchover valve (Y73/1) | Model 213, 253 |
| Input factors over exhaust LIN from | Output factors over exhaust LIN to | Supplemental information |
|---|---|---|
| Left exhaust flap actuator motor (M16/53) | Left exhaust flap actuator motor (M16/53) | Model 213 with code U78 (AMG sport exhaust system) |
| Right exhaust flap actuator motor (M16/54) | Right exhaust flap actuator motor (M16/54) | Model 213 with code U78 (AMG sport exhaust system) |
| Exhaust flap center actuator motor (M16/55) | Exhaust flap center actuator motor (M16/55) | Model 213 with code U78 (AMG sport exhaust system) |
| Input factors over engine CAN from | Output factors over engine CAN to | Supplemental information |
|---|---|---|
| ME-SFI [ME] control unit (N3/10) | ME-SFI [ME] control unit (N3/10) | - |
| Input factors over drive train CAN from | Output factors over drive train CAN to | Supplemental information |
|---|---|---|
| ME-SFI [ME] control unit (N3/10) | ME-SFI [ME] control unit (N3/10) | - |
| AMG suspension control unit (N3/43) | AMG suspension control unit (N3/43) | With code 466 (Active engine mount) |
| 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 via periphery CAN from | Output factors via periphery CAN to | Supplemental information |
|---|---|---|
| COLLISION PREVENTION ASSIST controller unit (A90) | COLLISION PREVENTION ASSIST controller unit (A90) | Model 205 up to model year 2019 with code 258 (COLLISION PREVENTION ASSIST), model 253 with code 258 (COLLISION PREVENTION ASSIST) |
| Active Brake Assist controller unit (A108) | Active Brake Assist controller unit (A108) | Model 205 as of model year 2019 with code 258 (Active Brake Assist), model 213 with code 258 (COLLISION PREVENTION ASSIST) |
| - | Integrated radar sensor on right outer rear bumper (B92/6), integrated radar sensor on left outer rear bumper (B92/11) | With code 22P (lane package) |
| - | Electronic ignition lock control unit (N73) | - |
| - | Mono multifunction camera (A40/11) | Model 205, 253 with code 513 (Traffic Sign Assist), code 640 (High Performance LED) or code 641 (dynamic left-hand traffic LED headlamp) or code 642 (dynamic right-hand traffic LED headlamp) or code 22P (Lane package) |
| - | Mono multifunction camera (A40/11) | Model 213 with code 513 (Traffic Sign Assist) or code 22P (Lane Tracking Package) or code P35 (Light Package) and except code 23P (Driving Assistance Package) and except code P20 (Driving Assistance Plus Package) |
| - | Left headlamp control unit (E1n9), right headlamp control unit (E2n9) | Model 205, 253 with code 631 (static left-hand traffic LED headlamp) or code 632 (static right-hand traffic LED headlamp) or code 640 (High Performance LED) or code 641 (dynamic left-hand traffic LED headlamp) or code 642 (dynamic right-hand traffic LED headlamp) |
| - | Left headlamp control unit (E1n9), right headlamp control unit (E2n9) | Model 213 with code 631 (Static left-hand traffic LED headlamp) or code 632 (Static right-hand traffic LED headlamp) or code P35 (Light package) |
| - | Front left LED matrix lamp unit control unit (E1n11), front right LED matrix lamp unit control unit (E2n11) | Model 213 with code P35 (Light package) |
| Input factors over chassis FlexRay from | Output factors over chassis FlexRay to | Supplemental information |
|---|---|---|
| Instrument cluster (A1) | Instrument cluster (A1) | - |
| Head unit (A26/17) | Head unit (A26/17) | - |
| Audio/COMAND control panel (A40/9) | Audio/COMAND control panel (A40/9) | Model 205 up to model year 2019, model 205 as of model year 2019 except code 446 (Touchpad only), model 213 except code 446 (Touchpad only), model 253 |
| Supplemental Restraint System control unit (N2/10) | Supplemental Restraint System control unit (N2/10) | - |
| Front SAM control unit (N10/6) | - | - |
| Climate control, control unit (N22/1) | Climate control, control unit (N22/1) | - |
| Electronic Stability Program control unit (N30/4) | Electronic Stability Program control unit (N30/4) | - |
| 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), model 213 with code 23P (Driving Assistance Package) |
| Left front door control unit (N69/1) | - | - |
| Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | - |
| Steering column tube module control unit (N80) | - | - |
Variants
The powertrain control unit variants, e.g. national, exhaust and function variants, are activated by XENTRY Diagnostics using the variant coding function.
| Wiring diagram for powertrain control unit | Engine 177.9 in model 205 up to model year 2019Engine 177.9 in model 253 | PE54.21-P-2141-97FBA | |
| Engine 177.9 in model 205 as of model year 2019 | PE54.21-P-2141-97FBB | ||
| Engine 177.9 in model 213 up to model year 2021 | PE54.21-P-2141-97DBA |