Restraint System Pyrotechnic, Electric And Mechanical Components, Replacing After A Collision

Special tools and workshop equipment required 

• Vehicle Diagnostic Tester

The airbag control module must be replaced:

• If the display "Control module faulty" appears after checking the DTC memory
• after three side/ driver/ front passenger airbag or belt tensioner deployments
• if housing is damaged
• if there is deformation on the tunnel within a 200 mm radius around the control module

Always replace the following:

• All deployed airbag units

Also with Front Passenger Airbag Deployment:

• Instrument Panel
• Deformed supports of the front passenger airbag unit (cannot be reformed).
• All front airbag sensors on the front end
• Remaining transverse acceleration sensors if the mounting points are deformed in the sensor area

Also with Driver Airbag Deployment:

• Return Spring with Slip Ring
• All front airbag sensors on the front end
• Remaining transverse acceleration sensors if the mounting points are deformed in the sensor area

Also with Thorax Airbag Deployment:

• Pressure sensors on the deployed side
• Transverse acceleration sensors on the deployed side
• Cover
• Cushion
• With a folding rear seat backrest: side cushion (if equipped)
• Remaining transverse acceleration sensors if the mounting points are deformed in the sensor area

Also:

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

-- 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 " Airbag", check whether there is a crash entry in the airbag control module.

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

TIP: 

• The error message "Resistance Too High" may also be stored if there is an open circuit. Then there is normally 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 (PYROTECHNIC COMPONENTS) .
• Also check the seat belts. Refer to SEAT BELTS, CHECKING .

-- If parts of the seat belt system are removed due to an accident, replace the belt system 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 distribution center or to the Importer for registration.