GF42.45-P-5119FA | Electronic Stability Program control unit component description | 22.2.08 |
MODEL 203.7 as of model year 09/YoM 08 model refinement package
P42.45-2648-04
N47-5 ESP and BAS control unit
Location
The ESP and BAS control unit is located in the left front of the engine compartment.
Task
The ESP and BAS control unit has the following tasks:
Reading in of sensors, pickups and signals
Evaluating input factors
Control of functions
Actuation of components
Reading in of sensors, pickups and signals
The input factors are read in with the following connections:
Direct line
Private Bus
Engine compartment CAN
Direct line
The following components are read in via a direct line:
- BAS diaphragm travel sensor (A7/7b1)
- BAS release switch (A7/7s1)
- BAS solenoid valve (A7/7y1)
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- ESP brake pressure sensor (B34)
- Left front rpm sensor (L6/1)
- Right front rpm sensor (L6/2)
- Left rear rpm sensor (L6/3)
- Right rear rpm sensor (L6/4)
- Right front brake pad contact sensor (S10/2)
Private Bus
The ESP and BAS control unit reads in the data from the rotational speed and lateral acceleration sensor (B24/15) via the private bus.
Engine compartment CAN
The ESP and BAS control unit reads in function-relevant information via the engine compartment CAN.
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Evaluation of input factors
The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.
Control of functions
The ESP safety system incorporates the following functions:
- Electronic Stability Program (ESP)
- Acceleration Slip Regulation (ASR)
- Engine braking regulation (EBR)
- Antilock brake system (ABS)
- Electronic brake force distribution (EBV)
- Brake Assist (BAS)
- Tire pressure loss warning (with code (477) Tire pressure loss warning)
- Cruise control
- Limiter
Actuation of components
Components are actuated with the following lines:
Direct line
Engine compartment CAN
Direct line
The following components are actuated via a direct line:
- Stop lamp actuation via rear SAM control unit with fuse and relay module (N10/2)
- SPS [PML] solenoid valve (Y10) (with code (213) Speed-sensitive power steering)
Engine compartment CAN
The ESP and BAS control unit transmits requests for function-relevant actuations via the engine compartment CAN.
Variants
- Basic variant
- Vehicles with speed-sensitive power steering
(with code (213) Speed-sensitive power steering)