For a 1988 - 560SL;

Can a used Air Flow Meter be tested while NOT installed to see if it will work or is within the operating guidelines, even a partial test, such as the Continuity Test? What tests can be performed before being installed?
Thanks,
Robert

I tested the afm on a 944 by removing it and ghetto rigging up a 12 volt battery and a volt meter to the inputs and outputs. get these things to stay and open the meter, voltage should rise as you open the meter door. I am sure you can also check resistance while it is on the vehicle. your looking for a smooth rise in voltage and a smooth drop as the door closes. if the meter seems confused, it prob needs replacement.

http://frwilk.com/944dme/afm.htm

keep in mind this is for another vehicle. but a afm is a afm. this will show you how to check one.

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88 300e
92 mr2