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Method for detecting malfunction of a cooling system based on detected coolant temperature

  • US 7,363,804 B2
  • Filed: 10/17/2006
  • Issued: 04/29/2008
  • Est. Priority Date: 12/17/1996
  • Status: Expired due to Fees
First Claim
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1. A method for detecting a malfunction of a cooling system of an internal combustion engine, comprising:

  • detecting a coolant temperature on a side of the engine; and

    determining, when a parameter related to an intake air amount reaches a predetermined value, a malfunction of a cooling system based on the detected coolant temperature,wherein the malfunction determination uses the coolant temperature detected at an engine start time.

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