Electrical Power Steering Control Unit (ES), Component Description - GF46.35-P-7010LF
Model 217, 222
Illustration shows steering gear
Location
The electrical power steering control unit is mounted onto the steering gear.
Tasks
The electrical power steering control unit has the following tasks:
- Reading in of signals
- Evaluation of input factors
- Actuation of components
- Transmission of requests/information
Reading in of signals
The input factors are read in over the following connections:
- Direct line
- Chassis FlexRay (Flex E)
Direct line
The signals from the following components are read via a direct line:
- Electric power steering torque sensor
Chassis FlexRay
The following signals are read in over the chassis FlexRay:
- Steering assistance torque request and wheel speeds, from the Electronic Stability Program control unit (N30/4)
- "Drivetrain ready" status, "engine running" status and engine speed, from the ME-SFI control unit (N3/10) (with gasoline engines) or from the CDI control unit (N3/9) (with diesel engines) via the engine CAN (CAN C) and powertrain control unit
- Steering wheel angle (detected by steering wheel angle sensor (N49)) and steering angle speed, from steering column tube module control unit (N80)
Evaluation of input factors
The input factors which are read in are evaluated by the integrated microprocessor, the relevant components are then actuated and requests/information are output.
Actuation of components
The following component is actuated directly:
- Electric power steering actuator motor
Transmission of requests/information
The following requests/information are sent over the suspension FlexRay:
- Request for a warning message over the electronic ignition lock control unit (N73) and the user interface CAN (CAN HMI) to the instrument cluster (A1)
- Steering torque, steering angle rate of change and steering assistance status to the Electronic Stability Program control unit
- Current status from electrical power steering control unit
| Wiring diagram for electric power steering control unit | PE46.35-P-2101-97SEB | ||
| PE46.35-P-2101-97SEA |