Quote:
Originally Posted by RickKlem
When I turn my key to the On position my fuel pump begins to run. From what I understand the pump should not run until the starter has been engaged or if the air plate is lifted up. I am trying to figure out why mine is not reacting as expected. Where do I begin troubleshooting? Could the switch on the air plate be bad or out of adjustment? If so, how do you get to it and how do you test it?
I’m looking for step by step things to check for.
Thanks
Rick
|
Rick,
Check if the AFS electrical plug is connected at the backside of the AFM (air flow meter). You could find out if the electrical plug is connected by using your fingers to feel it or use a small mirror. If it is connected then you could do the following test.
a). Remove the FP relay and locate terminal #85 on the relay socket. You could test terminal #85 either using continuity test between #85 and the sensor plate. Or use a 12-volt TL (test light). I find the TL more convenient and practical for this kind of test.
Terminal #85 is a ground connection for the FP relay that goes to the driver-side terminal or pin of the AF switch. The passenger side terminal of the AFS switch is connected to the AFM body and the wire (brown) goes to D- (alternator).
If you decide to use a 12-volt TL which I strongly recommend, use terminal#85 (FP relay socket) as your ground source. Connect the alligator clip of the TL to a known 12-volt source or use the positive pole of the battery. With the TL connected to a 12-volt source, place the tip of the TL to any known good ground for test. Then test terminal #85.
It should not lit up (NORMAL). If it does lit up, you got a PROBLEM.
Either the electrical plug is disconnected or the switch is defective.
b). AFS switch test and adjustment. Will do this later after you have done the above test.
Keep us posted.
Tony
Correction/edit:
The highlighted text above should read as:
"It should lit up (NORMAL). If it does not lit up, you got a problem".