Condition for fault identification

Test condition:

The fault is recognized when the relationship between the indicated intake manifold pressure and the mass airflow calculated based on throttle-valve angle is not correct.

Potential problem source(s):

• Measured value for intake manifold pressure (absolute) is too low
• Defective plug or wiring harness
• Vacuum leak within induction tract/crankcase
• Incorrect throttle-valve angle
• Pressure sensor defective

Terminal condition: none

Voltage condition:

• Onboard electrical system voltage between 9 V and 16 V

Temperature condition:

• None

Time condition:

• None

Other conditions:

• Engine on
• Pressure drop at throttle valve exceeds 18 hPa