Condition for fault identification

Test condition:

The fault is recognized when the monitored pressure is 90 hPa below the specified pressure while the wastegate's pulse-duty factor is simultaneously too high.

Potential problem source(s):

• Boost-pressure sensor defective
• Vacuum converter for wastegate valve defective
• Wastegate valve is defective (seized in open position)
• -

  Terminal condition: none

  Voltage condition:

• None

  Temperature condition:

• None

  Time condition:

• None

  Other conditions:

• Engine speed > 1900 RPM
• A load must be applied to ensure that the turbocharger boost will be within a specific closed-loop control range (specified pressure ratio at compressor greater than 1.25 to 1.8 and less than 1.7 to 2.5, in both cases as characteristic curve over engine RPM)