Diagnostic Method: Notes

After establishing the execution conditions, calculate the front oxygen (A/F) sensor lambda deviation cumulative value per 128 milliseconds (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 - sglmdn_n-1 )|) becomes the predetermined value or more, calculate the diagnostic value.

Judge as NG if the criteria below are met. Judge as OK if the criteria below are not met.