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) too high
• 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:

• 30°C < intake-air temperature < 120°C
• -30°C < coolant temperature

Time condition:

• None

Other conditions:

• Engine on
• Pressure drop at throttle valve exceeds 18 hPa
• 745hPa < barometric pressure
• 500 RPM < engine speed < 7000 RPM
• 133 RPM < dynamic RPM response (RPM window)
• 7.7% < dynamic load response (load window)