Testing Digital ABS sensors: Ford Escape
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- Опубліковано 30 вер 2024
- This 2006 Ford Escape has an ABS light on the dash and a trouble code C1234 "Right Front Wheel Speed Sensor Signal Missing."
I show how to perform a complete ABS system diagnosis, starting from a test drive to manually testing the sensor with an oscilloscope.
This turns out to be a perfect example of why you should NOT change parts just based on trouble codes!!
This vehicle has digital-type ABS sensors, which are becoming the norm for most newer vehicles. Testing digital ABS sensors with an oscilloscope is not as easy as the traditional AC pulse generator VRS-type sensors. We go over a few quick tricks to set up your scope and what to look for when testing these digital-type sensors.
Here are two great videos on digital ABS sensors from ScannerDanner:
• How to test a digital ...
• How to test a digital ...
The repair of this Ford Escape will be shown in Part 2.
Enjoy!
Haha to funny I uploaded a Jeep today with a C1044 and almost the same waveform. It was a bit of a bigger toilet than this rust free cream puff. I also left everyone hanging too haha. They are gonna think we are up to something lol. So that waveform was a little tricky to pick up at first glance huh. The broken tone rings on A/C type sensors are definitely much easier to see. Great diag. man!
+South Main Auto Repair You are up to no good we need more videos come on guy dont be like paul danner he went hollywood on us!
+South Main Auto Repair This is the 2nd time that both you of posted the same problem at the same time LOL Great cooperation !!
+Willem Streutgers Both of you are making cliffhangers LOL
They know that we cant stop checking in to see whats going on they have us,
+Willem Streutgers I noticed too whats going on, must be a conspiracy. LOL
At higher speeds the dropouts seem further spaced, likely is the tone ring, anyways, how do I test this when I can’t even move the vehicle? And will the light be on after a reset? I seem to have dead sensors but can’t spin the wheels and only have a single external connection waveform meter
ok wtf? you and eric posting an abs issue within hours.... the jeep thing!?!?!?!?! hahaa keep the videos coming buddy! it's helping me learn my verdict bigtime
I noticed the same thing...last week they had very similar problems too!
Nice vid Ivan. When you get your next scope would you consider a Pico scope, it would have to be rolled around on a cart but I did see a guy in England with the setup , looked awesome, well of course he makes vids with it .
+STEVE ROB That English guy with the PicoScope cart is funny! Yeah my next scope will definitely be a Pico for sure :)
Nice find on the tone ring Ivan and good explanation to point out the differences on the scope. Looking forward to the repair and take care...
I guess you and sma started same upload days. Times and subjects. Lol
thanks Ivan for great video, a good tool on the Verus is to use the graphing multimeter to plot the frequency maybe that would have shown the drop out clearer many thanks sandy
+sandy anderson Great point, I should have tried the component test meter too! Oh well maybe next time :)
+motoYam82 no worries, your a genius anyway cheers sandy
Nice job Ivan. Thanks for pointing out the scope subtleties. I'll definitely be applying them to my Vantage. We definitely have to use our senses and only a fool would ever discount visual inspection.
Excellent video! Thank you it helps a lot .. I have just bought a 2005 escape. And I don't have all the Fancy equipment. But would this also show itselft in the form of the rear wheels locked together like a positrac diff? When you make a u turn it drags or scoots one tire... There doesn't seem to be any differential between the rear wheels... Any thoughts would be greatly appreciated!
Wow didn't know they came available with a locking differential lol...I would lift up the rear end with the car off and turn one wheel by hand; the opposite one should spin the other way freely.
What's most problems with check advance trac light, cause that's lots of problem with advance trac
great video...liked how you got the signal with ac coupling...scanner danner used an amp clamp to get his signal on a jeep...amp clamp will allow testing on both wires..but your way would allow 2 channel testing ...known good signal and faulty signal....this type of sensor maybe the future for all digital signals....a two wire square wave sensor...this will give the engineers extra wiring room for more smart modules...maybe an over engineered license plate lamp computer on the CAN...lol.....great testing skills
Nice Job Ivan. These Fords ( and a lot of the GMs ) are Notorious for breaking tone rings. I replace them quite often. The GMs although play havoc with the drivability.
It's a great weekend when I get to watch SMA & PHD ABS diagnostic videos after removing the carbs off my ZL600. Eric will have his Part 2 posted tomorrow so maybe after I rebuild the carbs tomorrow I'll get to watch round 2 of SMA & PHD ABS repairs...:-)
Cost to have tone rings replaced both front?
Nice video if you graph the frequency it will show the same as the live data with glitches very handy set up on the snap on scopes.
Just upgraded to a pico 4 channel and it is awesome but expensive
Keep it up
Thanks
Visual diagnosis the best way to go, but scope method more accurate.
That was a great diagnosis. For you it was simple, for me it was educational. I could never justify buying a Verus but man that's an awesome tool.
+wyattoneable They make some very affordable standalone lad scopes ya know...
Hey Ivan, do you and Eric time these videos together.
+Kev Taylor I was just thinking when would Ivans abs video turn up :)
excellent explanation of your diagnosis thanks
Nice video! Thanks for sharing Ivan!
great video ivan
Ivan, do your viewer's think there is a conspiracy going on? There should be a full investigation started immediately. Quick, get Mrs. O out here to check it out. LOL
I think that the engineers developed a crap out gene in the materials. So naturally ivan and eric o, living in the rest belt, would have cars with similar problems, hows that for a save eric and ivan!
Same issue as Eric O Not the first time
+Steve Allen They may as well be in in the same shop there like family ivan and eric not a thing wrong with that just need more!
Mine is not a 4wd. Does that mean it's surely One of the front wheels?
Good TS, visual inspection must done first.
i escape with a cracked tone wheel that never happens haha, or cracked brake hoses
I am 90% confident that that IS a variable reluctance sensor ! You can mot reference the signal to ground. You need to measure a "difference" between the 2 wires. Likely there is a way to do this on your 'scope using 2 inputs.
+theoldwizard998 The second wire on the sensor is just a common ground. This type of ABS sensor actually has internal circuitry to transform a typical AC variable-amplitude signal to a two-state fixed amplitude signal. There is no way to see the raw AC signal on a scope without cutting the sensor open :)
Cracked brake lines and cracked tone rings are super common on this gen Escape. Dorman makes just the tone ring to keep people from having to constantly buy axles.
+Chad Bob Thank goodness for Dorman!
I replaced one last year, drivers side. Had the same symptoms now, another one to replace. I have a pit in the garage, a lot easier to just go underneath and look then fool around with a computer. I mistakenly thought you were going to repair it in this video.
He didn't "fool around" with the computer. He is showing how to to use it as a diagnostic tool. In other words, this is an educational video. That flew right over your head. Why did you assume he would repair it in this video - the title says "testing ABS sensor".
@@donmoore7785 And I'm saying it was faster and easier just to go underneath and look at it and know for sure which is what he did in the end anyway.. Computers can be great aids in diagnostics and sometimes personal knowledge is faster and better. Plus there may be more than one explanation for a certain code. Sorry if I stepped on your computer oriented toes.. Sometimes you have to get off your butt and take a look. It won't hurt you.. I'm pretty sure this guy knows how to fix it.. I'd like to know how to fix it instead of............. wait for it.... fool around with a computer. Did that fly over your head or was that direct enough ?
AC Sinewave :)
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What does that buzzer that goes off during the test drive mean?
+Varinki seat belt
+Bub Dog's What do you think? Thanks.
+Varinki It sounded like a time bomb lol
+motoYam82 I'm glad that neither of my cars have one of those. One has a light on the instrument panel the other has nothing.
+Varinki some of the later model Fords will even mute the radio if you don't buckle your seat belt.