CEL codes/ High ALT output charge?

[Espresso]

Ok, here is what is going on. Been having trouble with the XLT. I finally figured out( after replacing everything that WAS bad) that the PCM was no good
http://www.explorerforum.com/forums/showthread.php?p=1167138#post1167138
I got 4 codes on the KOEO test( haevnt doen the other tests yet. 1 step at a time )
55
56
65
something I cant figure out. It was just a series of semi long tones
1 1 1 1 1 1 1 1 no seperate pauses. About 1 sec inbetween them with on stops
WTF is a code 7?
Now I know that my ALT is a bit screwy( when running it is steady on the L, but dips to 8 when operating windowes & suck...see here
http://www.explorerforum.com/forums/showthread.php?t=129163

55 is Open connection in Key circuit or Charging voltage too low
56 is MAF or AOT senor too high. I do know that the tranny isnt acting right
(it doesnt feel like it shifts properly & sometimes hunts between OD & D)
65 is Charging voltage too high( over 17.5) which I believe mine is ( acording to the gauge, not the DMOV I have. DVOM says 16.7 which is still to high).
Or the OCS switch, which I dont have. Or the EEC never went into closed loop, but considering I drove for well over 20 miles @ 45-50 MPH I would say that isnt it.

So, my question is Could a malfunctioning ALT cause the sensors to read out of wack on the EEC-IV system? Getting too much or not enough voltage, or are they regulated through the PCM?

 

[MrShorty]

That still isn't correct self-test output. Your '94 should output three digit codes. What are you using to pull codes?

So, my question is Could a malfunctioning ALT cause the sensors to read out of wack on the EEC-IV system? Getting too much or not enough voltage, or are they regulated through the PCM?

There are some of each. Some, like the MAF use B+ as a power supply. Others run off of Vref, which is a 5 V regulated power supply. And, of course, essentially all sensors are referenced to B-, so a bad ground connection can cause problems.

 

[Espresso]

I am using the Actron scanner from AZ.
But I just went & did it again today. I was in a hurry yesterday & thought they were 2 digit codes not three.
I pulled them today & got the 565 canister purge solenoid.
I figured it was bad. Because of some of the tests I did, recommended from the site showed it as bad.
So i'm going to NAPA tomorrow & getting it. I'm also going to be doing the KOER tests tomorrow.