Component description for supplemental restraint system control unit - GF91.60-P-4068G

MODEL 463.306/336/346 as of model year 2011/YoM 10 

MODEL 463.202/222/236/237 as of model year 2009/YoM 08 

MODEL 463.247/248/249/254/270/271/303/340/341 as of model year 2007 

Location 

The restraint systems control unit is located on the center tunnel.

Task 

The restraint systems control unit is used to ensure passive occupant protection. If an accident occurs, the restraint systems control unit triggers the restraint equipment. This includes the airbag units and the emergency tensioning retractor units. The restraint systems control unit has self-monitoring and fault monitoring features. Frontal, rear end, and side impacts are recorded, and a distinction is made between the different types of impact.

The restraint systems control unit is not a subscriber of the interior CAN (CAN B). Signals to be sent via interior CAN are read in by the rear signal acquisition and actuation module (SAM) (N10/2) and sent via interior CAN.

Scope of tasks 

• Accident detection and ignition time determination
• Ignition stage deployment
• Storing of non-volatile crash telegrams
• Fault display via STAR DIAGNOSIS
• Capacitor for the event of a battery disconnection if a collision occurs
• Self-test and permanent monitoring of the supplemental restraint system (SRS) and fault display with non-volatile storage of faults and downtimes
• System readiness indication via the rear SAM to the instrument cluster (A1)
• Programmability with regard to equipment via Star Diagnosis
• Actuation of the separate digital and analog crash output

Discrete inputs 

• Circuit 15
• Circuit 15R
• Circuit 31
• Left sidebag and windowbag sensor (A53/1)

  (only model 463.236/237/248/249/270/271/341/346)

• Right sidebag and windowbag sensor (A54/1) (only model 463.236/237/248/249/270/271/341/346)
• Front passenger seat occupied and child seat recognition sensor (B48)
• Left front seat belt buckle restraint systems switch (S68/3)
• SRS right front seat belt buckle switch (S68/4)

Discrete outputs 

• Driver ETR squib (R12/1)
• Passenger ETR squib (R12/2)
• Passenger airbag squib 1 (R12/4)
• Left rear ETR squib (R12/6)
• Right rear ETR squib (R12/7)
• Driver airbag squib 1 (R12/13)
• Driver airbag squib 2 (R12/14)
• Left windowbag squib (R12/16)

  (only model 463.236/237/248/249/270/271/341/346)

• Right windowbag squib (R12/17)

  (only model 463.236/237/248/249/270/271/341/346)

• Automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
• Crash signal to the CDI control unit (N3/9) (with diesel engine) or to the ME-SFI [ME] control unit (N3/10) (with gasoline engine)
• Digital crash signal to the rear SAM
• Analog crash signal to the rear SAM
• Seat belt reminder warning signal to the rear SAM