1. for access to Ford Explorer and Ranger owner generated reviews and discussion, tech tips, how to articles, off-road modifications, events, and more! Since 1996 we have been the #1 Ford Explorer resource on the Internet. We also cover the Explorer Sport Trac, Mercury Mountaineer, Lincoln Navigator, Mazda Navajo, Mazda Pickups, and the Aerostar.

    Register Today It's free! This box will disappear once registered!

Notes on pulling EEC-IV codes

Discussion in 'EEC IV' started by MrShorty, December 2, 2005.

  • Searches ExplorerForum.com
    1. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      This is from a post I wrote in October. Intended as a supplement to other sources. There are several others on the net (put "Ford EEC-IV self-test" into your favorite search engine), and any good repair manual should have instructions. FWIW, the first time I did it, I was working from my Haynes manual and managed to figure it all out.

      I hope this proves helpful

       
    2. Support EF


      Join the Elite Explorers for $20 a year

      Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose and fix problems yourself, and learn which modifications work without having to experiment on your own. Elite Explorer members see practically no ads, add your own profile photo, upload photo attachments directly to your posts and Media Gallery, create more private Conversations, and more. Join Today. Your support is greatly appreciated.



      to hide adverts.
    3. ExplorerDMB

      ExplorerDMB Moderator/Technician Moderator Emeritus

      Joined:
      January 26, 2004
      Messages:
      6,209
      Likes Received:
      1
      Trophy Points:
      0
      City, State:
      Mechanicsville, Virginia
      Year and Model:
      2004 Acura TL
      cool post - thanks for sharing! :thumbsup:

      -Drew
       
    4. Glacier991

      Glacier991 EF Tranny Guru Moderator Emeritus

      Joined:
      February 8, 2003
      Messages:
      9,830
      Likes Received:
      4
      Trophy Points:
      38
      City, State:
      Sacramento, CA 95827
      Year and Model:
      1992 XLT
      Mr. Shorty is one of the best of the best on this board. For newbies, when he weighs in on an issue, especially electrical diagnosis, you just heard from the ultimate authority.
       
    5. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      Feel like I need to add a little something here. Call it "how to get/communicate the most information possible from my EEC-IV codes."

      I often see someone post a request like, "I pulled codes and got xxx. HELP!" My first question in response to such a post is usually, "Is xxx a KOEO, KOER, or CM code?" 2nd question: "Did you get pass (11, 111) from the other portions of the test?"

      In my experience, the designations "KOEO, CM, KOER" to identify a code add a significant amount of information to most codes. I would suggest that, when pulling or conveying codes, always include some designation. Another suggestion would be to include which portions come back "pass" (11/111 depending on year/engine). Doing so conveys more information than just "I got code xxx"

      Example:

      Instead of "code 158"
      note
      KOEO: 111
      KOER: 111
      CM: 158
       
    6. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      Another note. Sometimes someone will post something to the effect of, "there were no codes in the computer." no codes can be interpreted two ways:
      1) The computer didn't respond at all to the self-test trigger or
      2) All tests came back "pass" (11/111)

      If the EEC-IV computer doesn't have any errors/faults to report, you will get pass codes from all three portions of the test, and it is best to report it as such. So, instead of, " no codes in the computer" report the condition as, "all pass codes from the computer."
      If you pull codes from the computer and the computer doesn't seem to respond, then it's time to investigate why the computer didn't respond (operator error, bad connection between computer and self-test connector, no power/ground to the computer, etc.).
       
    7. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      http://www.explorerforum.com/forums/showthread.php?t=231222

      Somebody posted this thread with a video of his check engine light flashing the codes. For those who want to see what the test looks like, this might be useful to see what the flashes look like, and see if you can come up with the same codes we got.
       
    8. Tbars4

      Tbars4 Offroad/Fitness Moderator Staff Member Moderator Elite Explorer

      Joined:
      March 4, 2007
      Messages:
      26,467
      Media:
      4
      Likes Received:
      15
      Trophy Points:
      68
      City, State:
      anaheim hills,california
      Year and Model:
      95 ranger 4x4/ 91 X 4x4
      ...Great idea MrShorty...:bigthump

      ...Here is another video in post #16 of this thread...This time he is using a scan tool to read the flashes...This thread is great for first timers to see that he did miss waiting for the end of test codes ...;)

      http://www.explorerforum.com/forums/showthread.php?t=232262
       
    9. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
    10. jaycin

      jaycin New Member

      Joined:
      September 7, 2009
      Messages:
      23
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Big D
      Year and Model:
      93 XLT
      Extra Wire?

      Hello,

      I began the process today of reading the OBD1 codes on my 93 Explorer. This thread will be very helpful. I found the large black connector OK and the separate small connector. However, the small one has TWO wires running into it --- a green one and a gray/red one. Which one do I connect the jumper to?


      Also one (white) of the many wires that run into the black connector can be pulled out. This single wire terminates in a connector itself. When viewing the face of the black connector, this white wire is housed on the far left. Could this be the correct one to connect the shorting wire?

      Would appreciate your reply.

      Thanks
       
    11. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      My wiring diagram for my '92 shows that the gray/red is Vref which feeds +5V power to several sensors, and the dark green wire is the return wire for the octane adjust pin. That connector is over in the same area, so I think what you are seeing here is the connector for the octane adjust pin.

      On my '92, the STI connector does connect to a white wire, but that wire goes into the harness -- not to the self-test connector.
       
    12. jaycin

      jaycin New Member

      Joined:
      September 7, 2009
      Messages:
      23
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Big D
      Year and Model:
      93 XLT
      Thanks for the reply. I guess I'm still confused here. Self-Test??? I've taken a clear pik but I'm not allowed to attach it, and I don't have a way to upload it to the web. Would you be kind enough to give me aa email address so I can send this to you?

      By the way, The white wire has a purple stripe as well.

      Many Thanks
       
    13. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      The white/purple wire should be the STI lead, which you should jumper to SIG RET to enter self-test mode. The picture at troublecodes.net/Ford I referenced above is pretty good.
       
    14. jaycin

      jaycin New Member

      Joined:
      September 7, 2009
      Messages:
      23
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Big D
      Year and Model:
      93 XLT
      MrShorty, I ran the KOEO test today and got codes 157 and 341. I will clean the MAF and hopefully get fixed up. I need to know if the Octane adjust service pin (Code 341) needs to be connected to somthing, Mine just hangs loose but I wanted to check this out. I also want to know if I need to run KOER tests if the MAF cleaning fixes things.

      Many Thanks
       
    15. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      Most of the time there's a shorting bar in the octane adjust service pin plug that allows the timing to advance 3 degrees more than without. If the engine pings excessively with this installed, it often gets removed to alleviate the pinging. If the engine is running fine, the shorting bar is not really needed.

      If cleaning the MAF resolves the CM 157 (my code list indicates that the 157 cannot be a KOEO code), then you don't need to run the KOER test. If I were in your position, I'd probably run the KOER test anyway, if only for the practice.
       
    16. nugs

      nugs Member

      Joined:
      July 4, 2010
      Messages:
      68
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      fargo, nd
      Year and Model:
      92 xlt
      so my 92 xlt wont have the SEFI either correct?
       
    17. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      correct
       
    18. nugs

      nugs Member

      Joined:
      July 4, 2010
      Messages:
      68
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      fargo, nd
      Year and Model:
      92 xlt
    19. bad1891

      bad1891 New Member

      Joined:
      November 16, 2008
      Messages:
      4
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Meridian, Idaho
      Year and Model:
      1995 XLT
      Mr. Shorty I hope your still working these forums... I need help (don't we all) I have a 95 ford explorer XLT running jerkish. The CEL is on and I can't get a code reader to pull the codes? After seeing Mr. Joe dirts info I manually pulled the following codes, not sure what to do after this? I hope you can help. Thanks
      KOEO 335, 335
      CM 172, 332, 336
      KOER 412, 121, 326, 411, 167, 632
       
    20. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      Start with the KOEO 335, which is (almost) always the DPFE sensor.
       
    21. bad1891

      bad1891 New Member

      Joined:
      November 16, 2008
      Messages:
      4
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Meridian, Idaho
      Year and Model:
      1995 XLT
      Thanks for the speedy reply! I'm not a mechanic by trade but I am very mechanically inclined... I'll look into the Differential Pressure Feedback EGR Sensor and let you know. Many thanks!
       
    22. bad1891

      bad1891 New Member

      Joined:
      November 16, 2008
      Messages:
      4
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Meridian, Idaho
      Year and Model:
      1995 XLT
      Changing out the DPFE sensor did the trick! Thanks for the Help!!
       
    23. bile

      bile New Member

      Joined:
      September 25, 2011
      Messages:
      25
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Pa.
      Year and Model:
      95 ford explorer xlt
      should i do nothing about the code 632? or should i perform koeo again, this time remembering to push the button. Could it possibly show new codes , that it didnt before?
       
    24. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      I would not expect to show different codes, but I would do it again, anyway. If for no other reason than it is good practice.
       
    25. bile

      bile New Member

      Joined:
      September 25, 2011
      Messages:
      25
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Pa.
      Year and Model:
      95 ford explorer xlt
      632

      Yeah, what the heck, I'll do it again. I like learning new stuff everyday.
       
    26. MrShorty

      MrShorty Explorer Addict

      Joined:
      December 27, 2001
      Messages:
      5,061
      Likes Received:
      1
      Trophy Points:
      58
      City, State:
      Spanish Fork, UT
      Year and Model:
      92 XLT and '87 Bronco II
      I don't know if yet another video is really needed, but this guy, in post #3, posts another video reading his codes (I hope future JP doesn't mind). This set has a long list of KOEO codes, but passes CM. If you can read this set of codes, you should be able to figure out just about any list your PCM can spit out at you.

      http://www.explorerforum.com/forums/showthread.php?t=342313
       

    Share This Page








    We Support Our Troops!