Component description for front reversible emergency tensioning retractors - GF91.40-P-4020RF
Model 205, 253 with code 299 (PRE-SAFE® system)
Shown: Model 205.0
Location
The reversible emergency tensioning retractors are located at the bottom of the respective B-pillar.
Tasks
The reversible emergency tensioning retractors have the job of tensioning the seat belt of the driver or front passenger seat in certain hazardous situations by actuating an integrated actuator motor in order to minimize the consequences of a potential accident. If the seat belt adjustment function is active, the seat belt slack is additionally reduced when the seat belt is fastened.
The tasks are subdivided as follows:
- Reading in of signals
- Evaluation of input factors
- Transmitting signals
Reading in of signals
The following signals, among others, are read in via the user interface CAN (CAN HMI):
- Status of driver seat belt buckle switch (S68/3)
- Status of front passenger seat belt buckle switch (S68/4)
- Crash signal
- PRE-SAFE® status
- PRE-SAFE® stage
- Status of seat belt adjustment function
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
Evaluation of input factors
The read-in input factors are evaluated by the integrated microprocessor whereupon the integrated components are actuated and the CAN signals issued.
Transmitting signals
The reversible emergency tensioning retractors send e.g. the request to display a fault message via the user interface CAN to the instrument cluster (A1).
The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).
| Wiring diagram, reversible emergency tensioning retractor | PE91.40-P-2200-97FBA |