Since the Escape and especially 2009-2010 4cyl or 6cyl Escapes are so prone to this failure of the throttle bodies. I figure I would make a short video detailing the replacement of the throttle body and the few extra steps to take to make it a successful repair. Hope this helps.

 

Thanks for the videos and explanations. I hope I never have to use them... I hope!

By chance, have you ever disassembled a failed throttle body assembly to see the guts? From the manual, electrically, I see that there is the positioning motor with two leads, and two potentiometers as position feedback sensors (two for redundancy).

I'm curious if the positioning motor drives the throttle plate directly, or if there is some gear train to gear it down first. I also wonder what technology the motor is. A stepper motor would have been a good choice, but a stepper motor requires more than two wires to drive the stepper's separate phasing coils. I designed a product in the early 1980s that used stepper motors for various functions, some quite precise, so I was well-versed in them back then.

 

Yes I have pulled a throttle body apart just the other day I made a video on it. It is the new style sensor and electronics and I have an old style electronic one soon I will be pulling apart. Yes there are 2 sensors for redundancy that mirror each other as shown in the video above. The way it looks is a regular dc motor that is PWM. Here is the video-

 

Thank you very much for the video!

It's sooo nice to see someone taking things apart and figuring out for themselves how things work! That seems to be a rarity these days, unfortunately. The best Engineers I have known and worked with were people who took things apart and worked on things themselves. It gave them a connection and systems ability that others did not seem to have.

Interesting that the failure is the position feedback sensor.

From motor pinion to spur, then from the pinion on the underside of the spur to the ~ 1/3 spur, that's a pretty good reduction ratio. So the motor spins quite a bit one way or the other for a small movement of the throttle plate, to give the precision.

I was trying to figure out the exact sensor method. For accurate positioning, it would seem that a feedback method with a lot of granularity would be required. That is, a slight movement of the throttle plate would give a lot of output pulses. It looks like the end of the throttle plate shaft lines up with the top of that IC, so I am wondering if the IC has a precision magnetic sensor in it. And that the end of the throttle plate shaft has a multi-pole magnet on it, such that the magnet has many many tangential poles on it. So a small rotational movement of the throttle shaft causes many poles to pass by the IC sensor.

They would know how many poles per increment of revolution should go by, they know the gear reduction ratio from motor to throttle, and can "zero" the pulse counter when the motor is released (engine idle state). After that, they could count X pulses per Y degrees of throttle rotation. Just a thought.

 

How does this relate to the extended warranty of the TB failures? I just got the letter yesterday and it states the problem is caused by contamination of contacts in the TB so what contacts are they referring to??

The letter states that you'd get a CEL and be in the limp home mode. There is supposed by a PCM flash coming in the spring to improve the performance if this happens and we'll get another letter when that's available.

EDIT:
Looked at the video above again and the only contacts are the motor contacts unless it's the connector contacts? Contacts can be cleaned.

 

Yeah these new ones are something new for sure and we never get any p2135 codes for these new ones just inaccurate movement of the plate or loss of control of the plate and hence the current recall to replace the throttle body. So they fixed the tp sensor issue and have motor contact issues now.

 

There is something more to the contact issue and must be the tension on the pins or the plating issue. Something other than cleaning the contacts and putting dielectric grease on or else they have us doing that for the recall.

 

It does say, "contamination of contacts". The explanation to vehicle owners isn't really accurate? Have you ever seen a situation(TSB) was just a contact cleaning and dielectric grease tocorrect? This isn't a recall. Is there a TSB on this problem?

 

I wonder if there would be a TSB. If there was, is it now cancelled with the reploacement notice?
According to the letter, the Throttle body gets replaced if/when you get the warning light. (There is a blurb in the letter about re-imbursement if you already had the TB replaced)
Because they're replacing the unit, a TSB would only cover 3rd failures, right?
Something tells me FoMoCo doesn't want to braodcast that scenario.

 

There shouldn't be a premature failure of the etb after this one, Ford usually doesn't release a recall and do a mass order of parts until the original concern is fix on the new units.

 

Yes this is a FSA which whether it is extended warranty or as bad as the new escape do not drive recall we group them all together at the dealer and call them recall FSA is just a fancy name to keep out of the papers. Yes there was a tsb on cleaning the contacts and applying dielectric grease to the drivers air bag on the ford focus, it later got rewrote in the workshop manual and tsb was cancelled I have a whole video on it. There is also a tsb on the new explorers to clean and apply dielectric grease to 3 connectors for air bag light codes that are intermittent.

 

Just got a letter in the mail today, warranty coverage on TB extended to 10/150 or Jan2015. We have a 2012 XLT 2.5L4. 95k on it and no TB issues yet.

 

I see many throttle body issues . Not so many on Fords lately though .Many GM issues though .2 GM , 1 Nissan That I replaced last week . Last Ford TB was last year that needed replacing . All I am saying .. they all have issues .

 

I can't count the number of Cobalt TB's I've done, it's almost as good as last gen Cavalier fuel pumps.