GF91.40-P-4020RD Component Description for Front Reversible Emergency Tensioning Retractors

GF91.40-P-4020RD Component Description For Front Reversible Emergency Tensioning Retractors
MODEL 172.4
- with CODE (299) PRE-SAFE





A76 Left reversible emergency tensioning retractor
A76/1 Right reversible emergency tensioning retractor

Location
The reversible emergency tensioning retractors are located in the respective B-pillar.

Task
The reversible emergency tensioning retractors perform the functions of the PRE-SAFE system and the seat belt slack reduction function.
The reversible emergency tensioning retractors perform the following tasks:
^ Reading in of signals
^ Evaluation of input factors
^ Actuating components

Reading in of signals
The input factors are read in via the following connection:
^ Chassis CAN (CAN E)

Chassis CAN
The following signals are read in over the chassis CAN:
- Status of driver belt buckle restraint system switch (S68/3) and status of front passenger belt buckle restraint system switch (S68/4) from supplemental restraint system control unit (N2/10)
- Request for reversible emergency tensioning retractor from the Electronic Stability Program control unit (N30/4)
- Request to perform seat belt slack reduction function from instrument cluster (A1)
- Request for triggering PRE-SAFE from the DISTRONIC electric controller unit (A89) (with code (233) DISTRONIC PLUS)

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.

Actuation of components
Components are actuated with the following connection:
^ Chassis CAN

Chassis CAN
The following component is actuated via chassis CAN:
- Instrument cluster