We've removed the cylinder head of the 535i and its been a great opportunity to do all these easy testing and calibration. I've tested the Air flow meter while i was at it. The tests i did were described in the Bentley manual.
That is, temperature sensor check and varying resistance with movement of the flap.
Some say you should rather do a varying voltage test, which i did. We opened the AFM and swiped the potentiometer before cleaning and then again after cleaning. We used a Oscilloscope to check the voltage. The condition of the unit was good and needed little cleaning.
The unit works well and performs well without any flat spots.
Connecting the patient to the machines:
The response measured with the Oscilloscope shows a good curve with no drops to zero volts. That would be typical of a dirty/faulty potentiometer.
Sent from my Nexus 7 using Tapatalk
That is, temperature sensor check and varying resistance with movement of the flap.
Some say you should rather do a varying voltage test, which i did. We opened the AFM and swiped the potentiometer before cleaning and then again after cleaning. We used a Oscilloscope to check the voltage. The condition of the unit was good and needed little cleaning.
The unit works well and performs well without any flat spots.
Connecting the patient to the machines:
The response measured with the Oscilloscope shows a good curve with no drops to zero volts. That would be typical of a dirty/faulty potentiometer.
Sent from my Nexus 7 using Tapatalk
