A4 Sedan L4-2.0L Turbo (BPG) (2005)
Side Air Bag: Service and Repair
Replacing Airbag Unit After an Accident
Replacing Airbag Unit After An Accident
Special tools, testers and auxiliary items required
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Diagnostic Operating System VAS 5051 A
NOTE:
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Airbag control module can be used for up to three actuations of side / head-level airbags and/or belt tensioners.
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After the third actuation, the DTC "control module faulty" will appear.
Airbag control module must be replaced:
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After driver-side/ passenger-side airbag deployment
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After three deployments of side or head-level airbag
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If housing is damaged
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If there is a deformation at channel, in a circumference of 200 mm around control module
Always replace the following:
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Any deployed airbag unit
Also replace the following if passenger-side airbag deploys:
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Instrument panel
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Deformed supports for passenger module (must not be bent back into place)
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Both sensors for front airbag on front end
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Lateral acceleration sensor if area near sensor in floor pan is deformed
Also replace the following if driver-side airbag deploys:
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Return spring with slip ring
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Both sensors for front airbag on front end
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Lateral acceleration sensor if area near sensor in floor pan is deformed
Also replace the following if side airbag deploys:
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Lateral acceleration sensor for side at which airbag that deployed
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For foldable rear seat back: Side cushion
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Remaining lateral acceleration sensor if area near sensor in floor pan is deformed
Also replace the following if head-level airbag deploys:
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Lateral acceleration sensor for side at which airbag that deployed
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Trim panel at A-pillar, B-pillar, C-pillar, D-pillar
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Remaining lateral acceleration sensor if area near sensor in floor pan is deformed
Also:
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All seatbelts with belt tensioners that have been triggered
A - if airbag control module has been triggered:
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Connect Diagnostic Operating System VAS 5051 A and select vehicle system "15. Airbag". Ignition must be switched on for this.
Front seatbelt tensioners:
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Read measuring value block display group 001: