How To: Pull Trouble Codes on a 1st Gen Explorer (paperclip method) | Page 5 | Ford Explorer - Ford Ranger Forums - Serious Explorations

  • Register Today It's free! This box and some ads will disappear once registered!

How To: Pull Trouble Codes on a 1st Gen Explorer (paperclip method)

Don Laws

New Member
Joined
July 25, 2011
Messages
2
Reaction score
0
City, State
Northwest, NC
Year, Model & Trim Level
1994 Ranger XLT
Good Morning Wade. I bought a code reader from Harbor Freight for about $75.00 to use on my other vehicles and have used it numerous times for others as well as myself. A good investment for the long term. The shops around here charge $25 and up to check a code for you. Hmmmm, wonder what it cost's to replace all of the O2 Sensors? Good Luck and Good Hunting
 


Join the Elite Explorers for $20 per year. Gets rid of the ads! New $5 per month "try out" option.

Elite Explorer members see no advertisements, no banner ads, no double underlined links, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create and save more private conversations, and more. Join Today. Your support is greatly appreciated.




Wade99

Member
Joined
April 29, 2011
Messages
40
Reaction score
0
City, State
Palm Harbor, FL
Year, Model & Trim Level
99
Don: Good morning. Yeah, I thought about that after I typed that (cost of three O2's will be more than cost of scanner) and was waiting for the bashing. From my Ford experience and this truck being a 96,,,I'm betting it's time for O2's anyhow.
 




baphomet666

Well-Known Member
Joined
November 24, 2010
Messages
409
Reaction score
0
City, State
Bordeaux,FRANCE
Year, Model & Trim Level
Explorer.1994. 4WD




BrooklynBay

Moderator & long time member.
Staff member
Moderator
Elite Explorer
Joined
November 11, 2005
Messages
55,122
Reaction score
691
City, State
Brooklyn, NY
Year, Model & Trim Level
88 89 93 95 96 Aerostars








baphomet666

Well-Known Member
Joined
November 24, 2010
Messages
409
Reaction score
0
City, State
Bordeaux,FRANCE
Year, Model & Trim Level
Explorer.1994. 4WD




Czar Zach

Member
Joined
July 17, 2010
Messages
45
Reaction score
0
City, State
Chino, California
Year, Model & Trim Level
1993 XLT
Is it just me, or on the OPs how-to post there's no pictures showing up.

I'd like to give this a try but i have no clue what or where the connecters and what nots are located. I tried looking around under the hood today but didn't find anything i thought might be the right stuff.
 




idaho_explorer

New Member
Joined
June 11, 2012
Messages
4
Reaction score
0
City, State
boise ,id
Year, Model & Trim Level
92 explorer xl
codes

ok so i pulled the codes on mine and pulled a 116 which is coolant out of range im guessing from the bigger thermostat that replaced the stock one also it pulld what i think was a 439 but i cant find anywhere if or what that one is it also pulled a 341 which is the Octane adjust (service multiplug) grounded i have no idea what thats all about when i reset seemed to run right but i disconnected the battery before and i did the same thing guess we go on a ten mile test drive and see if it happens again.any suggestions as to what the issue at hand is???
 




CBII

Well-Known Member
Joined
November 4, 2004
Messages
317
Reaction score
1
City, State
Edmonton, Alberta Canada
Year, Model & Trim Level
91 XLT
Thanks for the write up but I'm having epic problems with 91 explorer, so much so that I'm ready to scrap it. I have a check engine light and despite following the instructions to the tee I can not get into the diagnostic mode for my life. I've tried 3 different types of jumpers and even took the connector apart and cleaned the connections and I still can't get the CEL to flash?

Please help!
 




MrShorty

Explorer Addict
Joined
December 27, 2001
Messages
5,078
Reaction score
16
City, State
Spanish Fork, UT
Year, Model & Trim Level
92 XLT and '87 Bronco II
Have you tried tracing the wires from the self-test connector to the PCM to make sure there are no breaks between the PCM and the self-test connector? have you tried jumpering STI and SIG RET at the PCM?
 




gooter87

Member
Joined
January 12, 2012
Messages
10
Reaction score
0
City, State
Orem, Utah
Year, Model & Trim Level
1993 Ford Explorer
i have a 1993 EB 4.0 explorer, so i got the paperclip method down, do i do the KOER test with that still hooked up? or do i not do a KOER test, my CEL only comes on about 10 mins after driving
 




MrShorty

Explorer Addict
Joined
December 27, 2001
Messages
5,078
Reaction score
16
City, State
Spanish Fork, UT
Year, Model & Trim Level
92 XLT and '87 Bronco II
do i do the KOER test with that still hooked up?
Yes, you leave the jumper wire/paperclip in place to perform the KOER test.

or do i not do a KOER test,
Depends on where you are at in the diagnosis. I might suggest you do the KOER test just for practice. Standard procedure is to perform the KOEO test and resolve any KOEO codes. Then perform the KOER test and resolve any codes that come up during the KOER test. Finally, if there are any CM codes unresolved, work on those.
 




MindBender0001

Well-Known Member
Joined
January 1, 2013
Messages
105
Reaction score
0
City, State
Pateros, WA
Year, Model & Trim Level
'93 Explorer
I pulled codes from our '94 today. KOEO: First code is 629, Torque Converter Clutch Circuit Fault. Second code is 176, O2 sensor not switching-system is or was lean-left or front HO2S. Within the past month, we replaced the transmission with one that was professionally rebuilt at a shop near us. I'm wondering if the 629 code could be stored from the previous tranny? Also, the cruise control diaphragm was NOT connected. While at a wrecking yard for some other parts, I noticed how the CC diaphragm was SUPPOSED to be connected. When I got home, I connected ours the way it was on the rigs in the wrecking yard. THEN the CEL came on. For the first couple minutes of driving, no light. If the CC diaphragm caused a vacuum leak, could that cause the computer to store the 176 code? My wife said that it did start 'differently', so i put the line to the CC diaphragm back the way it was. I tried pulling the jumper while the codes were being output, but the codes are still there. And of course, my tabs expire in a few days and I need to run emissions to get new ones. The x seems to run fine, no driveability problems, not sure of the mileage. I'm just curious to see if you experts have any other thoughts and/or options.

-Bender
 




MrShorty

Explorer Addict
Joined
December 27, 2001
Messages
5,078
Reaction score
16
City, State
Spanish Fork, UT
Year, Model & Trim Level
92 XLT and '87 Bronco II
I'm wondering if the 629 code could be stored from the previous tranny?
Only if it is a CM 629 (from the 2nd set of codes output after the separator pulse). KOEO codes (before the separator pulse) are hard faults that are not stored or remembered. If it is a CM code, you should be able to clear it by removing the jumper. If that doesn't clear the codes, that suggests that the faults are currently present.

Second code is 176, O2 sensor not switching-system is or was lean-left or front HO2S. Within the past month, we replaced the transmission
One thing to check for after replacing the transmission is to make sure the O2 sensor wires did not get pinched or cut in between the transmission and the engine.
 




MindBender0001

Well-Known Member
Joined
January 1, 2013
Messages
105
Reaction score
0
City, State
Pateros, WA
Year, Model & Trim Level
'93 Explorer
Well as luck would have it, when they went for a power connection at the cig lighter, my wife told them the wires were melted and it didn't work. They had her turn off the truck and pop the hood to connect to the battery. When she started the truck, no light...while they were testing....which is how it has been ever since the light came on. Passed with flying colors.

As for the codes...if I'm getting 629 BEFORE the separator, then there is something has an issue AT THAT POINT. I'm gonna call the tranny shop that built the trans for that one. I'm gonna check the codes again tomorrow. She has a lot of driving to do (100 miles or so). My only concern at this point is that the 176 code was still there even after pulling the wire. I actually pulled the wire twice. The first time I pulled it after all codes were done. Ran the test again and 176 was still there. Pulled the wire the second time WHILE the code was blinking. Next test, still there. At that point I gave up and told her to go do emissions.

-Bender
 




noels

New Member
Joined
April 21, 2012
Messages
2
Reaction score
0
City, State
Santa Monica, CA
Year, Model & Trim Level
1993 Ford Explorer XLT 4w
Thank you Doonze, Joe Dirt & Mr Shorty,
Did my code check using the wire arc trick on my 93' Explorer, got the 159 MAF, replaced it and went from a horrific spit and sputter back to pretty smooth running for a 287k orig engine. Had the old girl for 20 yrs! THANK YOU FOR SHARING YOUR KNOWLEDGE!
 




Patrickf1986

New Member
Joined
July 8, 2013
Messages
2
Reaction score
0
City, State
Indianapolis, IN
Year, Model & Trim Level
1991 Explorer XLT
So here is my problem. I have a 91 XLT and my cel is always on (when running, in the on and acc position.) I tried the paper clip method last week to diagnose and had no luck. It doesn't pull any codes. A couple relays click and that is as far as it will go. I went to autozone and picked up an OBD-I reader and followed the directions to the T and still it does nothing. A couple relays click buzz and whirr and that is as far as it goes. What's the deal here? I know the harness has to be alright or it wouldn't enter test mode so what could be the malfunction?
 




MrShorty

Explorer Addict
Joined
December 27, 2001
Messages
5,078
Reaction score
16
City, State
Spanish Fork, UT
Year, Model & Trim Level
92 XLT and '87 Bronco II
Since I no longer have my Explorer, can someone verify that the CEL is supposed to come on in the ACC position? I thought the CEL stayed off in ACC. I guess my first thought is to check for faults in the CEL circuit.
 




peter683

Active Member
Joined
October 6, 2008
Messages
56
Reaction score
0
Year, Model & Trim Level
1991 Explorer
Just came back to this thread, thank you guy's for the tutorial I will have to try that as the CEL came on the other day then went off..
 


Join the Elite Explorers for $20 per year. Gets rid of the ads! New $5 per month "try out" option.

Elite Explorer members see no advertisements, no banner ads, no double underlined links, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create and save more private conversations, and more. Join Today. Your support is greatly appreciated.




vq5speed

Well-Known Member
Joined
June 17, 2008
Messages
652
Reaction score
8
City, State
1991 XLT Manual Locks
Year, Model & Trim Level
Stockton,Ca
Where do find the list of trouble codes.
 




Top