Drivetrain Control Unit, Component Description - GF54.21-P-2141MNH
Model 463 with engine 176.9, 177.9 as of Model year 2019
Vehicle view, Model 463.2
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 is responsible for the following tasks:
- Reading in of signals
- Output of signals and actuation of components
Apart from this, the powertrain control unit also acts as an interface (gateway) between the connected 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)
- Suspension FlexRay (Flex E)
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
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 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) | - | - |
| Accelerator pedal sensor (B37) | - | - |
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 [ME] control unit (N3/10) | ME-SFI [ME] control unit (N3/10) | - |
| Input factors via drive train CAN (CAN C1) | Initial parameters via drive train CAN (CAN C1) | 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 the user interface (CAN HMI) | Output factors over the user interface (CAN HMI) | 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) | - |
| 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) | With engine 177.9 |
| Low-temperature circuit switchover valve (Y73/1) | Low-temperature circuit switchover valve (Y73/1) | - |
| Left exhaust flap actuator motor (M16/53) | Left exhaust flap actuator motor (M16/53) | - |
| Right exhaust flap actuator motor (M16/54) | Right exhaust flap actuator motor (M16/54) | - |
| Input factors over suspension FlexRay (Flex E) | Output factors over suspension 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) | - |
| Active Brake Assist controller unit (A108) | Active Brake Assist controller unit (A108) | (except code EM4 (Driver Assistance Package)) |
| DISTRONIC distance pilot controller unit (A108/1) | DISTRONIC distance pilot controller unit (A108/1) | (with code EM4 (Driver Assistance Package)) |
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 over a ground line from the right A-pillar ground point (W29/2).
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-2141-97ZHA |