GF91.60-D-4048H Restraint Systems Control Unit, Component Description

GF91.60-D-4048H Restraint Systems Control Unit, Component Description

- except CODE (SH6) Thorax bag for driver (in seat backrest)
- except CODE (SH7) Thorax bag for driver and front passenger (in seat backrest)
- except CODE (SH9) Window bag for driver and front passenger Lowline







N2/14 Lowline airbag control unit

Location

The Lowline airbag control unit is mounted on the center tunnel under the center console.

Task

- Self-test on "c. 15R ON" and continuous system monitoring during operation of vehicle
- Storing of up to 24 recognized faults in the fault memory,
- Actuation of SRS warning lamp (A1e22) via Controller Area Network bus class B (interior) (CAN-B)
- Prevention of inadvertent triggering during normal driving operation by means of a safety sensor additionally integrated in the Lowline airbag control unit
- Output of the ignition pulses, while taking the corresponding parameters into account, to the following components:
- Driver emergency tensioning retractor squib (R12/1)
- Driver airbag squib (R12/3)
- Front passenger emergency tensioning retractor squib (R12/2)
- Front passenger airbag squib (R12/4)
- Center front passenger emergency tensioning retractor squib (R12/34), on vehicles with code (S23) Two-seater front passenger seat

- Switching off the engine when the airbag is triggered via the ME control unit (N3/23), with engine 272, via the CDI control unit (N3/21), with engine 646, or via the CDI control unit (N3/20), with engine 642
- Ensuring of energy reserve for igniting the particular squibs when voltage supply is interrupted for t = 300 ms. For the protection of the occupants and emergency rescue service personnel, triggering is no longer possible t = 1 s at the latest after the battery has been disconnected (G1)
The safety sensors for the emergency tensioning retractor and airbag system integrated in the Lowline airbag control unit are not looped in but directly evaluated by the processor.

Design

The Lowline airbag control unit is accommodated in an aluminum housing. The housing and electrical connection are designed to exclude malfunctions.