Subaru Vvt Learned Values Reset

Pedro Mobile Technician Indiana Posted   Latest  
Demonstration
Driveability
Programming
2014 Subaru Impreza WRX 2.5L (EJ255) 5-spd (TY758)

With the help of the “Subaguru” Leo Gilmore I have had success resetting Subaru ECM vvt learned values. There has been several posts here and some podcasts regarding this issue. I have attached some pictures of a 2014 WRX I reset today (big thanks to Tomi Oliva for sharing the screenshots). We wanted to share this case with you to spread awareness that it can be done and we are close to offer a brief presentation on how to do it. 

As explained before, driving with a timing fault the ECM will learn the wrong values. After the timing fault is repaired the ECM fails to revert to good learned values.

As of now the only oem solution is new ecm. The scan tool does not offer any type of reset function. 

We are looking into offering a short class on how to perform this reset. One way will be a short segment in Leo and Scotts Subaru class. Another will be a short webinar. 

You can reach out to me at … or to get on the list for the webinar or to get a module reset.

You can also reach out to Leo Gilmore with interest in the Subaru class.

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Helpful
Interesting
Thanks
Kurt Diagnostician
Saskatchewan
Kurt
 

Interested in a webinar on this reset. Have one in the shop, still waiting on an ECU from the dealer

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Richard Instructor
Florida
Richard
 

Great job Pedro, Tomi and Leo. This is a huge help for a lot of shops. I look forward to the webinar!!

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Matthew Diagnostician
Kentucky
Matthew
 

Thank u so much. This issue has been a pain in the past. I too would join the webinar

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Jason Owner/Technician
California
Jason
 

Would love to join the webinar. I have been installing used ECMs in these.

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Rudy Technician
Utah
Rudy
 

I dont recall this issue. What happens if the value is not relearned? Drivability,CEL? What MY vehicles pose these problems?

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Leo Technician
New York
Leo
 

Hi Rudy! Subaru FB/FA engines (4 cylinder chain driven) which first appeared in the 2011 Forester. Your question relates to only one factor in a larger process, but it boils down to the fact that the original cause of a VVT fault code can be fully repaired, all live data and all Mode 6 test results can be clean and correct, yet a correlation fault code will still return as a current fault if one…

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Geoff Diagnostician
Hawaii
Geoff
 

I found it especially interesting in that recent (last year maybe?) ASE Subaru VVT Webinar sponsored by Subaru that the instructor said ,“the function to clear the learned values used to be in the scan tool but THEY (engineers) took it out”. (and so now replace ECM is the only fix)

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Leo Technician
New York
Leo
 

Hey Geoff! Yup, that was June of last year.

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Paul Owner/Technician
California
Paul
 

This is interesting. I haven't seen it yet. Sort of like the old Nissans that wouldn't learn idle after a throttle body clean unless you disconnect a bunch of injectors. A couple questions: When you say driving with a timing fault, do you mean something that occurs by itself (stuck cam actuator, stretched chain, etc.), or do you mean that the cam timing was set incorrectly after a repair…

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Leo Technician
New York
Leo
   

When you say driving with a timing fault, do you mean something that occurs by itself (stuck cam actuator, stretched chain, etc.), or do you mean that the cam timing was set incorrectly after a repair. Hi Paul, it could be any of the above. I demonstrate examples with a dozen or so case studies in a class I've put together addressing these repairs. A very frustrating detail in some cases…

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Paul Owner/Technician
California
Paul
 

Ok. Sounds like a useful class.

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