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Home >> BMW >> 2011 >> 535i Automatic >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Passive Safety Systems - Overview >> Functions >> 4.3. System monitoring functions >> 4.3.3. Cyclic monitoring
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4.3.3. Cyclic monitoring

Once the system self-test has been successfully concluded and the system is ready for operation, a cyclic monitoring procedure is performed for fault monitoring purposes. Cyclic monitoring serves the purpose of internal diagnosis of the electronic control unit and the overall airbag system. The cyclic monitoring is carried out continuously as of terminal 15 and it is also continued after reaching logical terminal R and after the engine is OFF.