GF46.35-P-7010KA | Electrical power steering control unit (ES), component description | 18.11.10 |
MODEL 169.0 /3, 245.2 as of model year 2009 /YoM 08 model refinement package
P46.35-2036-05
N68 Electrical power steering (ES) control unit
Location
The electrical power steering (ES) control unit is attached to the steering gear housing of the rack-and-pinion steering.
Task
The electrical power steering (ES) control unit is responsible for the following:
Reading in of sensors and signals
Evaluation of input factors
Actuation of components
Transmission of requests/information
Reading in of sensors and signals
The input factors are read in via the following connections:
Direct line
Engine compartment CAN (CAN C)
Direct line
The following sensor is read in via a direct line:
- Electrical power steering (ES) torque sensor (A91b1)
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Engine compartment CAN
The following signals are read in via the engine compartment CAN:
From ESP and BAS control unit (N47-5):
- Steering assistance torque request
- Wheel speeds
From ME-SFI control unit (N3/10) (with gasoline engine) or from
CDI control unit (N3/9) (with diesel engine):
- Terminal 61
- Engine speed
From power monitoring control unit (N3/27) (with electric drive, model 169.090):
- Status of electric drive
From steering column tube module (N80):
- Steering angle and steering speed, detected by steering angle sensor (N49)
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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 via a direct line:
- Electric power steering (ES) actuator motor (A91m1)
Transmission of requests/information
The following requests/information are sent via the engine compartment CAN:
- Request for a warning message on the multifunction display (A1p13) sent to the instrument cluster (A1)
- Steering wheel torque and steering rate of change sent to the ESP and BAS control unit
- Steering assistance status
Referenced documents
- pe4635p210197baa Wiring diagram for electric power steering control unit
- pe4635p210197qa Wiring diagram for electric power steering control unit
- pe4635p210197qb Wiring diagram for electric power steering control unit