Component Description For Front Reversible Emergency Tensioning Retractors - GF91.40-P-4020LF
Model 217, 222
Shown model 222.0
Location
The reversible emergency tensioning retractor is at the bottom of the respective B-pillar.
Tasks
The reversible emergency tensioning retractor has the job of tensioning the seat belt 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 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 input factors are read in via the following connection:
- User interface CAN (CAN HMI)
User interface CAN
The following signals are read in over the user interface CAN among other things:
- 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
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 retractor transmits signals via the following connection:
- User interface CAN
User interface CAN
The following signal is transmitted via the user interface CAN, among other things:
- Request to display fault message to instrument cluster (A1)
| Wiring diagram, reversible emergency tensioning retractor | PE91.40-P-2200-97SEA |