Passenger Safety System Pyrotechnical, Electric And Mechanical Components, Replacing After A Collision

Special tools and workshop equipment required 

• Vehicle Diagnostic Tester

Airbag Control Module Must be Replaced:

• With driver and passenger airbag deployment "but not with airbag generation 9.*, 10.* and 8.R". Refer to PASSENGER SAFETY SYSTEM PYROTECHNICAL, ELECTRIC AND MECHANICAL COMPONENTS, REPLACING AFTER A COLLISION .
• After three side airbag, driver airbag, passenger airbag or belt tensioner deployments
• If housing is damaged
• If there is deformation on tunnel in 200 mm circumference around control module

Always Replace the Following:

• All triggered airbag units
• The Battery Interrupt Igniter -N253-

Also with Passenger Airbag Deployment:

• Instrument Panel
• Deformed passenger module supports (cannot be reformed).
• All sensors for front airbag on front end.
• Remaining cross acceleration sensors if anchorage point is deformed in sensor region.

Also with Driver Airbag Deployment:

• Coil connector with slip ring.
• All sensors for front airbag on front end.
• Remaining cross acceleration sensors if anchorage point is deformed in sensor region.

Also with Side Airbag Deployment:

• Pressure sensors on deployed side.
• Cross acceleration sensors on deployed side.
• Seat cover
• Cushion
• With a folding rear seat backrest: side cushion (if equipped).
• Remaining cross acceleration sensors if anchorage point is deformed in sensor region.

In Addition:

• All belt retractors with deployed belt tensioners.
• All belt retractors with deployed belt force limiters (depending on equipment).
• Seat belt latches for all automatic belt retractors with deployed seat belt tensioners.
• Seat belt height adjuster (manual and power) for all automatic belt retractors with deployed seat belt tensioners.

-- Connect the Vehicle Diagnostic Tester if there is a chance the belt tensioner and/or seat belt force limiter deployed.

-- In guided fault finding under "15 - Airbag", check whether there is a crash entry in the airbag control module.

-- Also check if the "Resistance too large" error is stored for the belt tensioner and/or belt force limiter. Deployed belt tensioners and/or belt force limiters must fulfill both conditions. "Prerequisite: the airbag control module was not replaced yet".

NOTE:

The "Resistance too large" error may also be stored if there is an open circuit. Then there is no crash entry.

Depending on the crash, the belt tensioner may have deployed while the belt force limiter did NOT. In that case, follow the disposal information for pyrotechnic components. Refer to AIRBAG, BELT TENSIONER AND BATTERY CUT-OUT UNITS, STORING, TRANSPORTING AND DISPOSING .

Also check the seat belts. Refer to SEAT BELTS, INSPECTING .

Deployed belt force limiters can be recognized by the following characteristics:

Fig 1: Identifying For Deployed Belt Force Limiters

Courtesy of AUDI OF AMERICA, LLC

The pin -1- and tab -3- are protruding out of the belt force limiter housing on the automatic belt retractor.

The tab -2- is no longer vertical but is diagonal toward the outside.

-- If parts of the seat belt system are removed due to an accident, replace the belt system mounting bolts.

-- If needed (visual inspection), the following must also be replaced: all faulty components.

-- After replacing the airbag units or the control module, affix stickers (only tear-off strips) to the registration card and return the registration card to the relevant Sales Center or to the Importer for registration.