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The abnormal decision device of the secondary air supply device, being the abnormal decision device of the secondary air supply device which supplies the secondary air on higher-level side than the exhaust air
The abnormal decision device of the secondary air supply device, being the abnormal decision device of the secondary air supply device which supplies the secondary air on higher-level side than the exhaust air
PROBLEM TO BE SOLVED: To suppress incorrect determination in malfunction determination of a secondary air supplying device.;SOLUTION: An ECU executes the program including a step of determining that there is a malfunction when a pulsation integrated value PS is larger than a malfunction determination value PS(1) in a zone wherein an engine speed NE is smaller than a threshold NE(1) and a load of an engine is smaller than a threshold KL(1), and a step S182 of determining that there is a malfunction when the pulsation integrated value PS is larger than the malfunction determination value PS(1) and larger than a malfunction determination value PS(2) (YES in S180) in a zone outside of the zone wherein the engine speed NE is smaller than the threshold NE(1) and the load of the engine is smaller than the threshold KL(1), and in a zone wherein the engine speed NE is smaller than a threshold NE(2) and the load of the engine is larger than a threshold KL(2).;COPYRIGHT: (C)2008,JPO&INPIT
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