2011 Volkswagen Jetta Stalling

Bernie Diagnostician New Mexico Posted   Latest   Edited  
Case Study
ATS - Automotive Test Solutions
Driveability
2011 Volkswagen Jetta Active 2.5L (EA113) 6-spd (Tiptronic)
Stalling Cold

Here is a case study I have just completed, this VW has an intermittent cold stalling issue.

diag​.​net/file/f4n7wbaed…

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Thanks
Eric Instructor
California
Eric
 

Excellent as always. The concern stated that the stalling occurred less after the vehicle warmed up. If that was an accurate observation, how would that relate to an internal PCM fault? Poor electrical connections/solder joints? Something else?

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Spiro Service Manager
New York
Spiro
 

Great process of elimination. Thanks for posting Bernie!

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Steve Diagnostician
Arkansas
Steve
 

Awesome diagnostic!

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Bernie Diagnostician
New Mexico
Bernie
 

Eric The most probable cause would be solder joints in the ECM.

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Dwight Owner/Technician
California
Dwight
 

I'm thinking bad solder joint also. Would preheating the PCM with a hot air gun, to where the vehicle stalls much less have help with the diagnostics. Would the tap test (beating the PCM with a screwdriver handle) caused the vehicle to stall? I wonder what would happen if the PCM was left in the freezer overnight, would you get a no-start, and warmed up with the heat gun, a start. Nice job…

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Caleb Diagnostician
Indiana
Caleb
 

Awesome stuff Bernie. Had a similar issue on a 20 Tiguan earlier in the week. Would stall after running about 15-30 seconds. Many modules reporting no comm with ECM all the time. Could not read DTC's from ECM. Could only read MVB's when it was running. Checked all powers, grounds and CAN lines during stall. All okay. Waiting for the ECM to finish the job.

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Christopher Technician
Virginia
Christopher
 

Thanks for that Bernie. Leaves no doubt. The VSS input is a great thought. I would not have been looking for that.

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Steve Instructor
California
Steve
 

Bernie, Great job showing diagnostic logic.

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Sean Diagnostician
United Kingdom
Sean
 

Great job Bernie. Would you consider a PCM software update next?

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Bernie Diagnostician
New Mexico
Bernie
 

Sean It would be a good idea to check for software updates before the PCM is replaced.

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Sean Diagnostician
United Kingdom
Sean
 

Really enjoy your case studies Bernie, keep up the good work.

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