Outline Of Diagnosis

Judge as NG when the throttle is open stuck, or when the difference between actual throttle opening angle and estimated opening angle is out of range. Judge as NG when any one of the six items for diagnosis is applied.

Throttle open stuck: 

• Throttle position is out of range
• Intake air amount is out of range

When the difference between actual throttle opening angle and estimated opening angle is out of range: 

• All time monitoring
• Actual opening angle change amount is small
• Actual opening angle change amount is large
• Actual opening angle does not change