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Method and apparatus for testing a dual airbag passive restraint system

  • US 5,187,465 A
  • Filed: 09/27/1990
  • Issued: 02/16/1993
  • Est. Priority Date: 09/27/1990
  • Status: Expired due to Term
First Claim
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1. An apparatus for testing a dual airbag passive restraint system having two firing circuits, each one of said firing circuits having a series connection of several circuit components including at least two inertia sensors connected in series with a squib across a source of electrical energy, each one of said inertia sensors having a normally open switch and an associated parallel connected resistor, said apparatus comprising:

  • means for isolating at least one of the inertia sensors in at least one of the firing circuits from the other circuit components of the associated firing circuit;

    means for monitoring, in said at least one firing circuit, at least one voltage value at a component connection while said at least one inertia sensor is isolated;

    means for determining from the monitored voltage value a value functionally related to the resistance of at least one circuit component in said at least one firing circuit while said at least one inertia sensor is isolated;

    means for comparing the determined value against predetermined limits; and

    means for providing an error indication if the determined value is not within the predetermined limits.

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