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Ford ABS Questions (Read 19,713 times)
The Extractor
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Ford ABS Questions
Mar 12th, 2015 at 10:35pm
 
Sorry for the really long post. Cheesy

Ok here is what Im dealing with. I have a 2000 f350 v10 gas
auto 4x4 xlt truck that I use offroad.
The ABS module took a dirt nap DTC C1185  and I need to bypass it with a signal convertor/emulator.
Ive checked all my fuses, checked the wiring and it all seems to be good.
I would simply replace it however it is and uncommon module being 2 whl abs instead of 4.
There is a hall effect sensor on the rear diff that supposedly produces and pulsing DC signal, then the ABS module converts it to supposedly a square wave signal for the PCM and GEM module then to the speedo and it also has and effect on the shifting in 4L. I have removed the module from the truck and opened it but I cannot inspect the chips as the circuit board is retained by the plug pins. I am going to
desolder and inspect it when my new iron and wick show up.

Ive spoken to the local dealer and he was very helpful and with the info I gave pretty much said it needs replaced.

Can anyone help me determine what exactly the signals are and build a emulator/ bypass etc ?

Thanks in advance for any and all help! - A

This is my module, and my truck.

...


...


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« Last Edit: Mar 13th, 2015 at 11:44am by The Extractor »  
 
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JNelson
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Re: Ford ABS Questions
Reply #1 - Mar 13th, 2015 at 11:00am
 
It would be way easier to ship the module out for repairs. Then it would just work as designed and cost less than replacement.

I fix cars for a living. They need to operate as designed by the factory and with associated reliability.
Meaning I cannot make some sort of signal converter to save a few bucks vs fixing it right.


Also note that if you desolder the pins and damage something or cannot reassemble it correctly the module repair shop will charge more or you cause irreparable damage...
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The Extractor
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Re: Ford ABS Questions
Reply #2 - Mar 13th, 2015 at 11:36am
 
Im not a stupid cheap butt redneck dummy who is trying to save a few bucks.

This isnt a car, or a vehicle that sees the road much at all. Considering the truck is a 2000 with a 1979 ford front axle and a 1998 GM rear axle with a tone ring added, the frame has been shortened by 3 feet, a complete internal roll cage, t case converted from elec shift to manual and a few other things, your suggestion doesnt really apply. But thanks anyway.

All the places online I found that "fix" modules pretty much have a 50/50 mix of terrible reviews and good. Id rather not gamble my money on something that "might" work.
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« Last Edit: Mar 13th, 2015 at 11:59am by The Extractor »  
 
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JNelson
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Re: Ford ABS Questions
Reply #3 - Mar 13th, 2015 at 1:29pm
 
Sorry I didn't mean to call you a cheap butt red neck. But in my opinion your solution "might" have a 50/50 chance of success and reliability...

In my opinion it might have less, much less than a 50/50 chance.

There are definitely guys here that can help you create what you are looking for, hope they find you.

But I would check the output of the rear speed sensor, they were common failure on the older axles.
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The Extractor
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Re: Ford ABS Questions
Reply #4 - Mar 13th, 2015 at 2:52pm
 
Hey no problem.  Cool
I checked the wires and they have continuity even when wiggled. I will put it on jack stands and see if it gives me a signal.

This is kind of is a crusade of mine to do this. Ya know one of those challenge accepted situation.
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JNelson
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Re: Ford ABS Questions
Reply #5 - Mar 13th, 2015 at 5:46pm
 
Never mind, I assumed the code was for the rear wheel speed sensor because you mentioned the module modified the signal.
The code is for internal power relay fault. The rear wheel speed sensor isn't going to set that code
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The Extractor
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Re: Ford ABS Questions
Reply #6 - Mar 13th, 2015 at 5:49pm
 
That code is the p0500 I had at the same time due to the ABS module failure.  Wink
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Re: Ford ABS Questions
Reply #7 - Mar 14th, 2015 at 5:47am
 
Do you have a VIN so I can check As-Built_Data thru Ford.

Some modules on Fords you can get used and as long as you can talk to the old module you can get a used module and then program it to your vehicle Wink

Ma be a cheaper fix and less hassle and achieve the same purpose Smiley
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The Extractor
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Re: Ford ABS Questions
Reply #8 - Mar 14th, 2015 at 2:47pm
 
1ftsw31s0yee33566

I think my truck uncommon as almost every other SD truck I look at has 4whl ABS.
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The Extractor
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Re: Ford ABS Questions
Reply #9 - Mar 14th, 2015 at 2:54pm
 
I want to be clear that I do not want to build a new abs module. I want a signal convertor to run the speedo.
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Abndanger
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Re: Ford ABS Questions
Reply #10 - Mar 14th, 2015 at 4:48pm
 
Understandable. But if the old module is still alive you can install a used one and do PMI and program the used one to your vehicle.

I need the VIN to look up the string code. This way lets say you can find a used one for 50 buck and find someone in your area capable of programming it with the Ford IDS you will have the original functionality back. Wink
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The Extractor
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Re: Ford ABS Questions
Reply #11 - Mar 14th, 2015 at 11:22pm
 
1ftsw31s0yee33566
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KarlW
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Re: Ford ABS Questions
Reply #12 - Mar 15th, 2015 at 2:22am
 
The Extractor wrote on Mar 12th, 2015 at 10:35pm:
There is a hall effect sensor on the rear diff that supposedly produces and pulsing DC signal, then the ABS module converts it to supposedly a square wave signal for the PCM and GEM module


If you have a scope this is a very easy system to test an access. Aka Cruise servo would be a good easy test point.

† Have you load tested power and grounds to ABS Module?
Does the dtc clear or hard?

The Extractor wrote on Mar 12th, 2015 at 10:35pm:
Can anyone help me determine what exactly the signals are


Here is what the data your after looks like
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« Last Edit: Mar 15th, 2015 at 7:17am by KarlW »  

vss.jpg (109 KB | 452 )
vss.jpg
 
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The Extractor
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Re: Ford ABS Questions
Reply #13 - Mar 15th, 2015 at 10:58am
 
Karl, thank you so much! I hope I can make a convertor for it now that I have the data. I dont have a scope, I almost a bought a fluke 123 scopemeter on ebay but now it looks like I dont need it.

I dont know how to load test them. I have check and cleaned all grounds nearby to the module and fuse box.

Im not sure what you mean by hard but it sets then comes right back when the ignition is cycled off to on.
My cheapy code reader couldnt even get to it. I had my buddy with a nice Snap On scanner track it down for me and try to clear it.
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« Last Edit: Mar 15th, 2015 at 1:06pm by The Extractor »  
 
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The Extractor
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Re: Ford ABS Questions
Reply #14 - Mar 15th, 2015 at 6:24pm
 
Karl could you post full screen shots of both images or email them to me please? Could post specs and other pertinent info on the scope used for this?


KarlW wrote on Mar 15th, 2015 at 2:22am:
The Extractor wrote on Mar 12th, 2015 at 10:35pm:
There is a hall effect sensor on the rear diff that supposedly produces and pulsing DC signal, then the ABS module converts it to supposedly a square wave signal for the PCM and GEM module


If you have a scope this is a very easy system to test an access. Aka Cruise servo would be a good easy test point.

† Have you load tested power and grounds to ABS Module?
Does the dtc clear or hard?

The Extractor wrote on Mar 12th, 2015 at 10:35pm:
Can anyone help me determine what exactly the signals are


Here is what the data your after looks like

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« Last Edit: Mar 15th, 2015 at 11:45pm by The Extractor »  
 
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