Exhaust Brake Not Functioning

Joe Owner/Technician Saegertown, Pennsylvania Posted   Latest   Edited  
Question
Braking
2011 Ram 2500 Laramie 6.7L (L ETJ) 6-spd (68RFE)—3D7UT2CLXBG629991
Exhaust Brake Not Functioning

Hi Everyone,

I'm working on a 2011 Ram 2500 with the 6.7L diesel engine, and customer complaint is that the exhaust brake doesn't work, I couldn't find much troubleshooting info on it, the ecm is showing that the exhaust brake switch is turned on so I figured everything is good from the switch to the ecm, and I also did a visual inspection on the wiring and that looks good, was wondering if someone could help me out? Thanks!

0
Sisco Owner/Technician
Mendon, Vermont
Sisco Default
 

Codes? Just replaced a turbo on a '14 because VGT vanes would not move. Controller (mounted to turbo) could be bad as well. You would have codes pertaining to such.

0 Default Ð Bounty Awarded
Joe Owner/Technician
Saegertown, Pennsylvania
Joe Default
 

Thanks for the reply! And no I don't have any codes. What is the best way to check if the vanes are moving?

0 Default Ð Bounty Awarded
Sisco Owner/Technician
Mendon, Vermont
Sisco Default
 

You could pull the actuator off the side of the turbo and see if mechanism moves. The issue with doing that on the '14 we had was there is very little clearance to access the lower bolt that would need to be removed with the actuator, and it was way too corroded to get it out.

0 Default Ð Bounty Awarded
Phil Technician
Tewksbury, Massachusetts
Phil Default
 

Is the vehicle modified? Emissions parts deleted? Check for disabled OBDII monitors that should be enabled. If it has non stock programming then I recommend return to stock before trying to diagnose anything.

0 Default Ð Bounty Awarded
Lucas Owner/Technician
Blowing Rock, North Carolina
Lucas Default
 

I've found more commonly than not, a turbocharger actuator failure will result in exhaust brake faults in the infancy of the failure. That being said, as mentioned some tuning revisions disabled the exhaust brake, and some C&C trucks had factory configuration options to turn it on and off! I'd look for other charger codes and inquire about other charger related symptoms.

+2 Default Ð Bounty Awarded
Kevin Owner/Technician
Weatherford, Texas
Kevin Default
 

Drive the truck and watch command vs actual VGT position on your scanner. This may give you some indication as to whether the veins/actuator are having issues and whether it is a command issue or not.

0 Default Ð Bounty Awarded
Joe Owner/Technician
Saegertown, Pennsylvania
Joe Default
 

Thank you all for your replies! Yes it does look like the truck has the emissions components deleted. And I did watch the VGT position and they seem to be sync with each other. Is there a way to check if the non stock program has disabled the exhaust brake?

0 Default Ð Bounty Awarded
Phil Technician
Tewksbury, Massachusetts
Phil Default
 

There may or may not be tuners that could tell you. Easiest to do is to return to stock calibration and then see how it works. Be aware, sometimes the PCM is locked by the tuner and you can't easily flash it back to stock-if so it would need a new PCM or someone who can possibly do board level chip flashing. Is this a newly purchased vehicle for the motorist-most likely from out of state? If so…

0 Default Ð Bounty Awarded
Ken Owner/Technician
Phoenix, Arizona
Ken Default
 

Non-oe tuner added.....your are wasting your time....if you reinstall the original program then all the deleted items will need to be installed....and as the laws are getting tougher on diesel deletes the customer will probably need to reinstall sooner or later anyway.

0 Default Ð Bounty Awarded
Caleb Diagnostician
Mishawaka, Indiana
Caleb Default
 

I know that you could actually enable and disable the exhaust brake with Witech in the ECM. However with it being tuned and deleted it needs to go back to the tuner to make sure everything is good on his end. Or if you have Witech you could enable it yourself. Otherwise I would not waste your time. If the ECM is receiving the switch input an the VGT vanes work then the only thing it can be is in…

0 Default Ð Bounty Awarded
Tyler Owner/Technician
Fort St. John, British Columbia
Tyler Default
 

Hey Joe did you get this sorted out? If not I can help

0 Default Ð Bounty Awarded
Joe Owner/Technician
Saegertown, Pennsylvania
Joe Default
 

Hey Tyler, Well not sure yet, I opened up the actuator and it looked like it could be bad and smelled like a burned circuit board, so I order a new actuator for it, but I'm not sure if that is going to fix it or not, I'm not getting any reading from the exhaust manifold back pressure sensor either, not sure if that really matters or not, maybe you can tell me?

0 Default Ð Bounty Awarded
Tyler Owner/Technician
Fort St. John, British Columbia
Tyler Default
 

For sure what's the best #

0 Default Ð Bounty Awarded
Joe Owner/Technician
Saegertown, Pennsylvania
Joe Default
 

Sure, it's …

0 Default Ð Bounty Awarded
Joe Owner/Technician
Saegertown, Pennsylvania
Joe Resolution
 

Thank you all for your help! Especially Tyler who called me! I opened up the actuator and found moisture inside of it and circuit board smelled burned, so replaced the actuator, now exhaust brake and everything works.

0 Resolution Ð Bounty Awarded