Electric Power Steering Control Unit, Basic Function - GF46.35-P-9890A
Model All (CAR)
Example illustration of electrical power steering control unit
Example illustration of electrical power steering control unit
Overview
This document contains information on:
- General
- Function
- Evaluation of input signals
- Output of signals
- Function extensions
General
The electric power steering control unit (3, 5) is the central control unit for the steering functions. It is attached at the rack-and-pinion steering together with the electric power steering actuator motor (2, 6).
Function
The electrical power steering control unit (3, 5) engages in the following functions:
- Electronic Stability Program (ESP®)
- Active Park Assist
Evaluation of input signals
The electrical power steering control unit (3, 5) primarily processes the following input signals:
- Steer Assist torque request and wheel speeds
- Engine status, drivetrain operational and engine speed
- Steering wheel angle and steering wheel velocity
- Current status and requested toothed rack position of parking system control unit
Output of signals
The electric power steering control unit (3, 5) processes these input factors and primarily transmits the following actuations:
- Warning message in driver display
- Steering torque, steering wheel velocity and steer assist status to the ESP® control unit
- Electrical power steering control unit, status
- Toothed rack position
Function extensions
Vehicles with conditionally automated parking or conditionally automated driving SAE level 3
To retain the electric steering function if the main on-board electrical system fails, the electrical power steering control unit (3, 5) is also connected to the secondary on-board electrical system via circuit 30.
In addition to connection via the secondary on-board electrical system, the electrical power steering control unit (3, 5) can, in the event of a fault, still communicate with the control units required for the steering function via a redundant signal path.
| Component descriptions | |||
| Electric power steering control unit, component description | Model 223 | GF46.35-P-7012A | |
| Model 243 | GF46.35-P-7012B | ||
| Model 206 | GF46.35-P-7012C | ||
| Model 297 | GF46.35-P-7012D | ||
| Model 295 | GF46.35-P-7012E | ||
| Model 232 | GF46.35-P-7012F | ||
| Model 238 up to model year 2021 |
GF46.35-P-7012FH | ||
| Model 296 | GF46.35-P-7012G | ||
| Model 254 | GF46.35-P-7012H | ||
| Model 118 as of model year 2023 Model 177, 247 as of model year 2022 |
GF46.35-P-7012L | ||
| Model 167 as of model year 2023 |
GF46.35-P-7012M | ||
| Model 192 | GF46.35-P-7012R |