Thread: Fuel Pump
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Old 09-14-2008, 10:48 AM   #6 (permalink)
Timon
MR2 MKI AW11
 
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Update: Problem solved.

I finally got my hands on a multimeter and tested the AFM. I tried two and five, as Aaron from Lithia Toyota mentioned, and I got infinite resistance. He stated if terminals two and five did not get continuity when the flap to the AFM was open then the AFM was not working properly and needed to be replaced. The way I see it, if something breaks and has to be replaced it can't hurt to tear it apart.

To make a long story short: Terminal one has a flimsy piece of metal that is held back by a rod when the flap to the AFM is at rest. When the flap is moved open the rod moves out of the way allowing the flimsy piece of metal to straighten out and touch a hard piece of metal on terminal two - therefore linking terminals one and two and creating continuity. This action is what actually turns on the fuel pump.

Problem & Resolution: The flimsy piece of metal connected to terminal one did straighten out, but it was not reaching terminal two when the flap was open. From the looks of it, somehow terminal two was moved just a hair off and no connection was made. Terminal seven wasn't plugged in as well, but that is problem due to me taking the AFM apart.
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