Supplemental Restraint System, Basic Function - GF91.60-D-9900A

Model All (Light transporter) 

Overview 

This document contains information on:

• General 
• Function requirement 
• Function 

General 

The Supplemental Restraint System (SRS) denotes the unit consisting of various passive safety elements that provides optimum occupant protection in the event of an accident.

Function requirement 

• Circuit 15R ON

Parts of the SRS remain active for a certain run-on time after circuit 15R has been switched off.

After battery disconnection, the SRS provides an energy reserve for at least 300 ms.

Function 

The Supplemental Restraint System (SRS) assesses various input factors, e.g. the occupancy status of the front passenger seat and the status of the seat belts. If the seat belt is not fastened, a seat belt warning is issued by the instrument cluster.

Signals from various sensors are evaluated for impact detection. The Supplemental Restraint System (SRS) uses this information to calculate the optimum deployment points of the corresponding restraint equipment and triggers it in the event of an accident. Additionally, various functions are started after an accident, e.g. to reduce the risk of fire.

In order to guarantee fault-free operation of the Supplemental Restraint System (SRS), its components are continuously monitored. Errors occurring are displayed to the driver in the instrument cluster.

The belt is prevented from extending in certain situations, irrespective of the status of the Supplemental Restraint System (SRS).