GF91.60-P-0003FQ Supplemental Restraint System Function

GF91.60-P-0003FQ Supplemental Restraint System Function
MODEL 218

Function requirements, general
^ The supplemental restraint system (SRS) must be programmed to the vehicle (left or right-hand drive vehicle, equipment programming and configuration parameters)
^ Circuit 15R ON

The status of circuit 15 is sent by the electronic ignition lock control unit (N73) over the chassis CAN (CAN E) to the Supplemental Restraint System control unit (N2/10).

Supplemental restraint system, general
The supplemental restraint system is used for occupant protection.
The supplemental restraint system function is made up of the following subfunctions:
^ Function sequence system monitoring
^ Function sequence power reserve
^ Function sequence belt lock system

Further subfunctions are described in separate documents:
^ Passenger-side seat occupied recognition, function (without code (494) USA version)
^ Passenger-side seat occupied recognition, function (with code (494) USA version)
^ Actuate supplemental restraint system, function
^ Deploying of pyrofuse, function

Function sequence system monitoring
The SRS continuously monitors itself and signals faults to the driver over the supplemental restraint system indicator lamp (A1e15) in the instrument cluster (A1).The switch-on request for the supplemental restraint system indicator lamp is transmitted by the Supplemental Restraint System control unit to the instrument cluster over the chassis CAN. The automatic child seat recognition airbag OFF indicator lamp (N72/1e1) in the upper control panel control unit (N72/1) is switched on. The request to switch on the automatic child seat recognition airbag OFF indicator lamp is sent by the Supplemental Restraint System control unit over the chassis CAN to the front SAM control unit with fuse and relay module (N10/1).
This actuates the automatic child seat recognition airbag OFF indicator lamp over the instrument panel LIN (LIN 1).
Any faults are stored in the nonvolatile memory of the Supplemental Restraint System control unit. The supplemental restraint system indicator lamp and the automatic child seat recognition airbag OFF indicator lamp are switched off after a successful self-test after t =4 s.

Function sequence power reserve
The Supplemental Restraint System control unit provides a power reserve for at least t = 300 ms if the battery has been disconnected.

Function sequence belt lock system
Irrespective of the Supplemental Restraint System control unit, the belt is prevented from extending in certain situations.