Front Reversible Emergency Tensioning Retractors, Component Description - GF91.40-S-4020TRA
Model 447.6/7/8
With Code JP1 (PRE-SAFE)
Except Code XM7 (MOPF II)
Model 448.8
With Code JP1 (PRE-SAFE)
Shown on model 447.8
Location
The front reversible emergency tensioning retractors are located at the bottom on the respective B-pillar.
Task
The task of the front reversible emergency tensioning retractors is to tension 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 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 are read in via the chassis CAN (CAN E):
- Status of driver belt buckle restraint system switch (S68/1)
- Status of front passenger belt buckle restraint system switch (S68/2)
- 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 front reversible emergency tensioning retractors send the following signal via the chassis CAN:
- Request to display the fault message to the instrument cluster (IC) control unit (A1/1)
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 | Model 448.8 with code JP1 (PRE-SAFE) | PE91.40-S-2200-97VDA | |
| Model 447.8 with code JP1 (PRE-SAFE) except code XM7 (MOPF II) | PE91.40-S-2200-97VVA | ||
| Model 447.6/7 with code JP1 (PRE-SAFE) except code XM7 (MOPF II) | PE91.40-S-2200-97VVB |