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Manifold air flow (MAF) and manifold absolute pressure (MAP) residual electronic throttle control (ETC) security

  • US 20050235743A1
  • Filed: 04/23/2004
  • Published: 10/27/2005
  • Est. Priority Date: 04/23/2004
  • Status: Active Grant
First Claim
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1. An engine fault diagnostic system, comprising:

  • a diagnostic module that generates a manifold absolute pressure (MAP) error signal and that generates a mass air flow (MAF) error signal; and

    a security module that generates an air flow fault when said MAP error signal exceeds a MAP threshold and said MAF error signal exceeds a MAF threshold.

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