Powertrain Control Unit, Basic Function - GF54.21-P-9894A
WARNING: This page is about a different car, the 2023 Mercedes-Benz C300, 2022 Mercedes-Benz C300, 2021 Mercedes-Benz C300, 2020 Mercedes-Benz C300, and 2019 Mercedes-Benz C300. However, it is still accessible from the selected car via links, so may be relevant.
Engine all (CAR)
Example illustration of model 167
Overview
This service information contains information on:
- General
- Function
General
Amongst other things, the powertrain control unit acts as an interface (gateway) between the control units that are integrated into the drivetrain.
Depending on the vehicle, the powertrain control unit communicates over the following communication paths:
- CAN bus (Controller Area Network)
- FlexRay
- Ethernet
Function
The powertrain control unit primarily intervenes in the following functions:
- Drive management
- Heat management
In order to carry out these functions, the powertrain control unit primarily processes the following input factors:
- Engine management ON (circuit 87)
- Low-temperature circuit coolant temperature
- Fan motor status
- Accelerator pedal sensor
- Start/stop button
- With manual transmission: Clutch travel sensor
- With manual transmission: Main shifter shaft position sensor
- With automatic transmission: Central communication
- Battery management system communication
- Hybrid drive system communication
The powertrain control unit processes these input variables and amongst others controls the following actuators depending on the engine variant:
- Exhaust flap controller
- Fan motor
- Radiator trim flap actuator motor
- Transmission oil cooling coolant circulation pump
- Low-temperature circuit circulation pump
- Coolant pump switchover valve
| Component description | |||
| Drivetrain control unit, component description | Engine all in model 223 | GF54.21-P-2141A | |
| Engine all in model 206 | GF54.21-P-2141C |