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Method for error diagnosis of an ambient-pressure sensor and an intake-manifold pressure sensor

  • US 7,463,960 B2
  • Filed: 05/12/2006
  • Issued: 12/09/2008
  • Est. Priority Date: 06/14/2005
  • Status: Active Grant
First Claim
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1. A method for error diagnosis of an ambient-pressure sensor and an intake-manifold pressure sensor of an internal combustion engine, comprising:

  • measuring a signal of the ambient-pressure sensor and a signal of the intake-manifold pressure sensor while the internal combustion engine is stopped;

    comparing an ambient pressure represented by the signal of the ambient-pressure sensor to a first intake-manifold pressure represented by the signal of the intake-manifold pressure sensor to determine a pressure difference; and

    if the pressure difference is greater than a predetermined maximum value, measuring at least one additional sensor signal while the internal combustion engine is running, wherein the at least one additional sensor signal is used for identifying a defective sensor.

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