Diagnostic Method 2

Detect the malfunction by calculating the average amplitude of λ.

Fig 1: Malfunction Indicator Light Illumination Pattern (Average Amplitude)

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Judge as NG when the following conditions are established.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria	Threshold Value	DTC
Average value for λ amplitude	> 0.06	P015A and P015B

Time needed for diagnosis: 90 s

Malfunction indicator light illumination: Illuminates as soon as a malfunction occurs.