Diagnostic Method: Notes

After establishing the execution conditions, calculate the front oxygen (A/F) sensor lambda deviation cumulative value per 32 milliseconds x 4 (Σ |(sglmd_n - sglmd_n-1 )|) and rear oxygen sensor output voltage deviation cumulative value (Σ |(ro2sad_n - ro2sad_n-1 )|), and when the front oxygen (A/F) sensor lambda deviation cumulative value (Σ |(sglmd_n - sglmd_n-1 )|) becomes the predetermined value or more, calculate the diagnostic value.

• Abnormality Judgment 

If the duration of time while the following conditions are met is within the time indicated, judge as NG.