A diagnosis device for an engine, the diagnosis device includes an electronic control unit. The electronic control unit is configured to execute EGR diagnosis processing to diagnose whether or not the EGR device operates normally while a vehicle is being decelerated, execute air flow meter diagnosis processing to diagnose whether or not the air flow meter is normal while the vehicle is decelerated, execute the EGR diagnosis processing after starting the air flow meter diagnosis processing, and execute the EGR diagnosis processing when the air flow meter diagnosis processing has not been completed and predetermined conditions that a duration of deceleration of the vehicle being shorter than a diagnosis time that is required to execute the air flow meter diagnosis processing are fulfilled.
Diagnosis device for internal combustion engine, and diagnosis method for internal combustion engine
2017-12-26
Patent
Electronic Resource
English
IPC: | B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF |
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