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| Vehicle diagnostic, testing and information system -VAS 505X- |
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| The airbag control unit can be used for up to three incidents in which the side airbag / curtain airbag and/or belt tensioner is triggered. |
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| After the third activation the fault display will show „Control unit defective“. |
| Airbag control unit must be renewed: |
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| If driver's/front passenger's airbag has been triggered |
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| After side and/or curtain airbags have been triggered three times |
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| In the event of a tunnel deformation within 200 mm radius of control unit |
| Always renew the following: |
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| All triggered airbag units |
| If front passenger's airbag has been triggered, also replace: |
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| Supports for passenger's airbag module which have become deformed (must not be bent back into shape) |
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| All front airbag sensors at front end |
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| Other transversal acceleration transmitter in the case of a deformation of the retaining points in the sensor area (floor pan area). |
| If driver's airbag has been triggered, also renew: |
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| Return spring with slip ring |
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| All front airbag sensors at front end |
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| Other transversal acceleration transmitter in the case of a deformation of the retaining points in the sensor area (floor pan area). |
| If side airbag(s) have been triggered, also renew: |
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| Pressure sensors on the side on which the airbag was triggered |
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| Transversal acceleration transmitters on the side on which the airbag was triggered |
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| When seatback (rear) is turned down |
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| Other transversal acceleration transmitter in the case of a deformation of the retaining points in the sensor area (floor pan area). |
| If curtain airbag has been triggered, also renew: |
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| Transversal acceleration transmitters on the side on which the airbag was triggered |
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| A-, B-, C- and D-pillar lining |
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| Other transversal acceleration transmitter in the case of a deformation of the retaining points in the sensor area (floor pan area). |
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| All automatic belt retractors with belt tensioners which have been triggered. |
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| All automatic belt retractors with belt force limiters (depending on equipment version) which have been triggered |
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| If you suspect that belt tensioner(s) and/or belt force limiter(s) has/have been triggered, connect a suitable vehicle diagnostic, testing and information system such as the vehicle diagnostic, testing and information system -VAS 505X-. |
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| In the »Guided Diagnostic Process« under „15 - Airbag“ verify, if there the a crash entry recorded in the control unit for airbag . |
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| Select the vehicle diagnostic, testing and information system -VAS 505X- and select „15 - Airbag“ in the vehicle menu system. When doing this the ignition must be switched on. |
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| Read measured value block, display group 001: |
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| Verify, whether for belt tensioner and / or belt force limiter the error "too large resistance" has been recorded at the same time. Belt tensioner(s) and/or belt force limiter(s) which have been triggered must fulfil both conditions. "Pre-condition: the airbag control unit has not been replaced yet and" and "resistance too large". |
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