E4OD Diagnosis Thread

I have seen a plethra of E4OD problem threads popping up lately. I hope that this thread will help guide those with issues through the diagnostic and maybe even the repair process. Hopefully this can save some of you some time, money, and frustration. The E4OD serves it's purpose but it's...

www.fullsizebronco.com

 

Any grinding noises?
How about when placing back into park?

 

No noises in any gear or when moving between gears. When working right the tranny works perfectly and is strong throughout all gears. Recently serviced, no metal in the pan. Did not make any difference. I feel it has to be electrical due to the fact it is so random but I don't know where to start.

 

Yo Wfg923,
Welcome!

E4OD Transmission Control Indicator Light (TCIL) is a LED with an overdrive on/off switch at end of the Transmission shifter stalk; flashing OD light is an indication of a transmission related trouble code in the Powertrain Control Module (PCM).
Is it flashing while driving?

Try a Self Test for Diagnostic Trouble Codes (DTC)s by my pal, BroncoJoe19 @ Code Reader
The engine temperature must be greater than 50° F for the Key On Engine Off (KOEO) Self-Test and greater than 180° F for the Key On Engine Running (KOER) Self-Test. Run it around to heat the engine up and shift thru all gears including Reverse. Make sure A/C is off and transmission is in Park (automatic); or in Neutral for a Manual & release clutch. Then turn off engine, all accessories/lights (close driver's door) , etc.

Do KOEO test First. Post Code(s) here according to KOEO & KOER.
A helper can assist you by counting the codes. Some use their smart phones to record them.

BEWARE OF FAN, BELTS, PULLEYS, HOT HOSES, IGNITION HIGH TENSION WIRES, AND ENGINE COMPONENTS

Or ask local mom and dad parts stores if they will test it for you.
Or purchase a coder reader such as Equus 3145 Innova OBD I Code Reader for Ford EEC IV Engines at Walmart & most parts stores
.
➡Nagging Neutral Nonsense & Pinpoint Test, Manual Manual Lever Position (MLPS) also called Transmission Range (TR) Sensor. Some of the problems the MLPS can cause are wrong gear starts, TCC hunting, no 4th gear, engine stalling, high or erratic line pressure & a sudden neutral condition; The negative lead of the multimeter should be placed at the MLPS signal-return ground terminal at the MLPS...This sensor is responsible for more malfunctions than any other sensor in the sys- tem, and the kicker is that it seldom stores a code 67 or 634..."
Source: by Pete L

Test, Pin-Point in 92-96; from Ford EVTM; "...The negative lead of the multimeter should be placed at the MLPS signal-return ground terminal at the MLPS. Check the resistance of the MLPS: The resistance of the MLPS (pins 30 and 46).." read more
Source: by Ford via alldata & justanswer.com
Lastly, MLPS
Connector Re-Pining; "...The new style Manual Lever Position (MLPS) also called Transmission Range (TR) Sensor comes with a matching vehicle harness connector. The problem is that you have to remove the pins and their wires from the old vehicle harness connector. What ever you do don't pull all the pins out at the same time because you will never figure out were they go. Easiest thing to do is remove one pin at a time and re-install it into the new connector..."
Source: by me
●□●
Here is the 1992 Ford F-Series Dealer Brochure @ 1992 Ford F-Series

Register with VIN to see most Ford dealer maintenance/repairs done @ any dealership nation-wide @ Welcome to Ford Owner | Official Ford Owner Site

For any questions or to chat about it's planned modifications or build, it's better to post each seperately in Noobie Bronco Tech Questions. Flame free zone. This will get more attention and you can build up your post count to get into other sections such as Bronco and Ford Parts/Accessories (75 posts required to view).

To save you time and for better responses, please fill out your Bronco info with location, year, engine size, transmission type, transfer case type (manual or electric shift), locking hub type (automatic or manual) info & major mods such as a Lift, etc. .
Bronco info is now able to be put under your user name.
Click your profile button in the top right and go to account settings.

On that first page, named Account Details, scroll down to "Vehicle Info" and type in up to 100 characters.

Now you can simply enter your information in the text editor and click save.

Forum faqs @ Common Replies to FAQs ... includes for example;
How to use search (Advanced) and How to POST PICTURES

➡See Baba Looey's Favorite FSB Links (lots and lots of tech links) ... includes such as, "Tailgate Window repair & troublehooting.

Try to VOTE in our Full-Size of the Month & Full-Size of the Year Contests @ F.O.T.M Voting
You will get ideas by those competing. Also see the prizes! They are awesome as compared to other sites' "contests"!

Al

 

@Wfg923 Have you verified your PSOM is correctly set? I had the exact same symptoms after changing tire sizes and once I reset my PSOM, the problems went away.

Watch this video to give you a clear understanding of resetting the PSOM.

 

I wouldn't think the psom would be out of calibration. I still have the OE size tires on the truck. P235/75-15

 

Have you owned the truck since it was built? A previous owner could have changed the settings when they were running oversized tires.

It is a free troubleshooting technique and can be done in 20 minutes or less. Nice to rule that out before parts changing racks up costs....

I wish I had checked my PSOM long before I did. I went several months trying to track down the culprit and found out it was the PSOM.

Just my 2 cents worth.

Another thing to make sure of is your grounds. Make sure they are making good connection. A poor ground can cause a ton of problems.

 

Look at the info provided. The vast majority of E4OD problems (where you don't hear grinding etc) are not transmission related - they are electronic in nature.

Check the MLPS sensor (Test it) and ALL the wiring to it. Do the same with the wiring harness to the solenoid pack on the other side of the transmission. Check the entire harness, check the connectors, and use a voltmeter to get the current readings.

 

Look at the info provided. The vast majority of E4OD problems (where you don't hear grinding etc) are not transmission related - they are electronic in nature.

Check the MLPS sensor (Test it) and ALL the wiring to it. Do the same with the wiring harness to the solenoid pack on the other side of the transmission. Check the entire harness, check the connectors, and use a voltmeter to get the current readings.

I want to do this also. Do you know what the readings should be on both the

Look at the info provided. The vast majority of E4OD problems (where you don't hear grinding etc) are not transmission related - they are electronic in nature.

Check the MLPS sensor (Test it) and ALL the wiring to it. Do the same with the wiring harness to the solenoid pack on the other side of the transmission. Check the entire harness, check the connectors, and use a voltmeter to get the current readings.

I hope to do this also. Do you know what the readings should be or where I can find them. I also suspect an electrical issue or possibly a pressure solenoid issue. I've just got to find the time to do it.

 

Here's what I think. You said recently serviced. Did they put the filter support clip in place? I have a feeling your filter dropped. Then when you shut the truck off, all the fluid drops to the pan and is now higher level than when running.

The filter is like a straw. You go to McDonald's and order a Coke. If your straw has a hole in it (filter drop), once the fluid drops below that hole you're sucking air. You really should drop the pan and make sure the filter is in place. With the truck running, the fluid level in pan is lower than when the truck is off.

 

I have thought of that and hope to get time to check it soon.

 

I am by no means discounting what you said. I will check this out also.

 

E4OD - How to test the MLPS?? - Ford Truck Enthusiasts Forums

Clutch, Transmission, Differential, Axle & Transfer Case - E4OD - How to test the MLPS?? - Background - '94 F350 7.3L IDI diesel, e4od auto 350,000 Kilometers - I have put on approx 30,000 of that number. Problems - Throws a code 62. Converter clutch error (E4OD) OD light on shifter blinks after...

www.ford-trucks.com