Drivetrain Control Unit, Component Description - GF54.21-P-2141MMK
Engine 276.8 in Model 222.163/173
Engine 276.9 in Model 222
View of Model 222
Location
The powertrain control unit is located in the front passenger footwell and it is fastened to the engine compartment's partition wall.
Task
The powertrain control unit is responsible for the following tasks:
- Reading in of signals
- Output of signals and actuation of components
Apart from this, the powertrain control unit acts as an interface (Gateway) between the connected CAN bus systems.
Reading in of signals
Input factors are read in by means of the following connections:
- Direct line
- Drive-train-LIN (LIN C3)
- Engine CAN (CAN C)
- Drive train CAN (CAN C1)
- Periphery CAN (CAN PER)
- Chassis FlexRay (Flex E)
- Hybrid CAN (CAN L)
Output of signals and actuation of components
Initial parameter are output over the following connections:
- Direct line
- Drivetrain LIN
- Engine CAN
- Drive train CAN
- Peripherals CAN
- Chassis FlexRay
- Hybrid CAN
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 and output factors for the following components are read in or output over direct lines by the powertrain control unit:
| Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
|---|---|---|
| Terminal 15 | - | - |
| Circuit 30 | - | - |
| Circuit 30 (fused) | - | - |
| Circuit 31 | - | - |
| - | Circuit 87C | - |
| Low temperature circuit temperature sensor (B10/13) | - | With engine 276.8 |
Input factors and output factors for the following components and control units are sent or received by the powertrain control unit over LIN or CAN:
| Input factors over engine CAN (CAN C) | Output factors via engine CAN (CAN C) | Supplemental information |
|---|---|---|
| ME-SFI control unit (N3/10) | ME-SFI control unit (N3/10) | - |
| Input factors via drive train CAN (CAN C1) | Output factors via drive train CAN (CAN C1) | Supplemental information |
|---|---|---|
| Accelerator pedal module control unit (B37n1) | Accelerator pedal module control unit (B37n1) | With engine 276.8 |
| ME-SFI control unit (N3/10) | ME-SFI 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 via hybrid CAN (CAN L) | Starting data via hybrid CAN (CAN L) | Supplemental information |
|---|---|---|
| Battery management system control unit (N82/2) | Battery management system control unit (N82/2) | - |
| Power electronics control unit (N129/1) | Power electronics control unit (N129/1) | - |
| Input factors via periphery CAN (CAN PER) | Output factors via periphery CAN (CAN PER) | Supplemental information |
|---|---|---|
| Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | - |
| Input factors over drive-train-LIN (LIN C3) | Output factors over drive-train-LIN (LIN C3) | 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) | - |
| Radiator shutters actuator motor (M87) | Radiator shutters actuator motor (M87) | For engine 276.9 |
| Low-temperature circuit switchover valve (Y73/1) | Low-temperature circuit switchover valve (Y73/1) | With engine 276.8 |
| Input factors over chassis FlexRay (Flex E) | Output factors over chassis FlexRay (Flex E) | Supplemental information |
|---|---|---|
| Electronic Stability Program control unit (N30/4) | Electronic Stability Program control unit (N30/4) | - |
| Electronic ignition lock control unit (N73) | Electronic ignition lock control unit (N73) | - |
Structure
The powertrain control unit consists of a plastic housing with three plug connections and internal measuring and control electronics.
Ground connection
The "Circuit 31" ground connection is made via a ground line from the front passenger footwell frame floor assembly ground point (W85/2).
Voltage supply
The powertrain control unit is supplied with power by "circuit 30 fused" and, with the ignition on, by "circuit 87".
| Wiring diagram for powertrain control unit | PE54.21-P-2141-97SEA |