I have an interseting question/issue here. I suspect that my TPS may not be funtioning properly. The CEL light doesn't come on with KOEO, probably a burned out bulb (I hope).

Anyway, I went to a local parts store (AA) to use their scan tool. When I went to hook up the scan tool, the pin locations on the tool and my COM port were different. Yes, I had the correct adapter, it fit just fine, but the pins were slightly different.

[ ] = slot for pin/no pin present
[X] = pin is present in this slot

The scan tool has this setup for the pins:
______[X] [X]
[X] [X] [X] [ ]
(ignore the line before the fist [X])

My trucks COM port (EEC IV connector) has this setup:
______[X] [X]
[X] [X] [ ] [X]
(ignore the line before the fist [X])

Is this a fluke or something. I thought about moving the pin location on the EEC connecter, but I don't want to damage it.

It is a '94 Ranger w/OBDI. Any thoughts on this or has anyone else seen this before? Are there two different versions?

 

Was AA's scan tool Actron????

My year 05, Actron CP-9150 scan tool kit, with the EEC-lV adapter, more closely matches the pin diagram of your vehicles diagnostic port, you posted above.

My Actron EEC-lV cables dagnostic connector pin layout, using your sybology for the plug/pin layout, looks more like
[X] [X]
[X] [X] [ ] [X]

With the 4 pins grouped together, over each other, followed by the blank space in the botom row & the offset pin as shown.

In fact my EEC-lV connector also has the fuel pumps pigtail power pin molded in, to the left of the diagnostic connections, in it's own separate section & the connectors pin layout sorta looks more like

___[-] [-]
[l]
___[-] [-]__ [-]

With the fuel pumps power pigtail connection centered between the two rows & off to the left, in it's own section & it's blade type pin in the verticle position & the diagnostic blade pins in their own section & their blade pins in a horziontal position & spaced as shown. Ignore the underlines.

So it would seem to me your vehicles EEC-lV diagnostic ports socket layout is correct.

IMO, either you have mis-identified or confused the EEC-lV & MCU connectors, because of shape. (the EEC-lV & MCU connectors have the same shape), but different pin breakout, or the cable manufacturer has screwed up & mis marked the cables.

So be sure to look on the connectors end, that plugs into your vehicles diagnostic connector, to be sure it has molded into it EEC-lV & the pins match your vehicles diagnostic ports sockets breakout.

If the AAP connector that you say is MARKED, EEC-lV, is layed out as you've posted, it's pin breakout is for a MCU diagnostic connector!!!!

If the latter is so, maybe the factory that made the plug, screwed up & has the wrong designation molded onto it.

The MCU connectors pin breakout, is as you've shown the AAP's EEC-lV connector to be!!!!!

If the AAP's plug, thats MARKED EEC-lV, really is screwed up, as you've indicated, maybe have a look at this AAP's plug thats marked MCU & see if it's pins match your vehicles EEC-lV connectors layout.

If the plugs were made at the same time & the factory screwed up & reversed the id on the two, maybe you'll get lucky & can find a match!!!! lol

If no match can be found, then try another AAP store, but check their EEC-lV connectors pin lay out, before using, to make sure it matches your vehicles diagnostic connectors socket breakout, just in case the two stores got their scan tool during the same time frame, or factory production run, the screw up happned.

If in fact, the factory did screw up the EEC-lV & MCU id's on a production run of plugs, there may be a whole bunch of this manufacturers scantools out there giving bad results!!!!

Again, your vehicles diagnostic port pin layout is correct for EEC-lV.

So check any scantools diagnostic plug your about to use & make sure it's molded in marking, on the plug that goes into the vehicles diagnostic port, says EEC-lV & it's pin breakout matches your vehicles diagnostic connector socket breakout .

Let us know what you find.

 

Thanks for your response pawpaw!

What exactly is the MCU? I have never heard of that before.

I believe that AAP's scan tool is an Actron, but I do not know the model #.

My EEC Test port, located next to the Power Distribution Box, has a seperate connector there. This is for the fuel pump? It snaps in the same cover as the EEC Test, but it is a single wire w/ a blade style connector, but it doesn't look like the diagram you posted IIRC.

BTW: how do I retrieve codes using a paperclip and a test light? Which pins do I connect the paper clip to?

I assume you put the paper clip in the test connector, then use the test light to read a series of flashes-yes?

Thanks!

 

MCU = Microprocessor Control Unit & was used by Ford from 1980-1991 on Police vehicles with carburated engnes.

The MCU connector is the same shape externally, as the EEC-lV connector, but it's pin breakout inside is different.

The EEC-lV connector was used by Ford from 1984-1995 on most vehicles with North American engines. It's easy to get the two mixed up, because they look the same externally, but have different pin breakouts inside.

Look in the "Tech Info" thread, atop this forums thread listing page & scroll down & find the how-to thread, on doing the self test hook up.

The self test pigtail, MUST be pluged into the EEC-lV connector, in order for the scantol to do all it's tests & you MUST provide a seperate 12 volt power connection to the scan tool, on the EEC-lV equipped vehicles, in order for them to power up.

On newer OBD-ll equipped vehicles using the in cabin J 1962 conector, power to the scan tool, is provided through the J 1962 DLC connector.

So a couple more hook-up things to check on the AAP's scantool, if you try it again on your EEC-lV vehicle.
Be sure their DLC connector says EEC-lV & it's pin breakout matches your vehicles DLC connectors sockets & you remember to plug the vehicles pig-tail, into the scan tools EEC-lV connector. It goes into the offset section I noted above & remember to provide a 12 vdc power source, for the scantool.

You'll use this pig-tail, with a jumper wire, if you decide to do the self test.

A scan tool is a whole lot, faster, easier to do & imo more accurate, because it's easy to get confused, tryng to count test lamp, or CEL light flashes, or watch and count multimeter needle swings, doing the self test.

Let us know how you do.