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Home >> BMW >> 2012 >> 528i >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Passive Safety Systems - Overview >> Functions >> 4.3. System monitoring functions >> 4.3.1. System self-test
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4.3.1. System self-test

The Crash Safety Module performs a system self-test as of terminal 15. The airbag indicator light is activated for approximately five seconds during the system self-test.

When the system self-test is concluded and no fault has been found, the airbag indicator light goes out and the system is ready for operation.