Service active dampening and off road limited management messages.

[Mack0092]

I had to go to the dealer and have them recalibrate the suspension

 

[jazico]

I had to go to the dealer and have them recalibrate the suspension

Did this fix the problem? Just wondering if the calibration stuck.

And did you talk to them about needing to have the truck on a lift when performing the recalibration? Also which calibration did you have them do? Rebound (PCM) or Ride Height (ADCM) ? Or both?

 

[Mack0092]

Did this fix the problem? Just wondering if the calibration stuck.

And did you talk to them about needing to have the truck on a lift when performing the recalibration? Also which calibration did you have them do? Rebound (PCM) or Ride Height (ADCM) ? Or both?

Yes, it did fix the problem. It was a pain in the ass, the dealer was clueless. I literally showed them the steps to recalibrate the truck to include putting it up on the lift. I believe we just did the ride height ADCM.

 

[jazico]

Yes, it did fix the problem. It was a pain in the ass, the dealer was clueless. I literally showed them the steps to recalibrate the truck to include putting it up on the lift. I believe we just did the ride height ADCM.

I did PCM recently, and still the same result, but from all my research yesterday, I learned there two re-calibrations, Rebound and Ride Height.

I am going to try to do the Right Height version (ADCM) and see if that yields better/different results.

 

[Dubstep Shep]

I did PCM recently, and still the same result, but from all my research yesterday, I learned there two re-calibrations, Rebound and Ride Height.

I am going to try to do the Right Height version (ADCM) and see if that yields better/different results.

You have a link to the procedures by chance?

 

[jazico]

You have a link to the procedures by chance?

This is what you want to tell them:

Height Sensor Calibration (ADCM)​

• The truck must be sitting on the ground, on a flat and level surface.
• Perform the calibration only at normal ride height, do not lift the vehicle.
• This ensures all sensors read proper resting voltages and prevents incorrect learned values.

---

TRX Suspension Rebound Reset (PCM)​

• The truck must be lifted off the ground with all four wheels fully free-hanging.
• Perform the rebound reset only in this state, it’s the required method for the TRX.
• This allows the system to correctly learn suspension limits and prevents rebound or damping error codes.

 

[jazico]

So, I took my vehicle to the dealership again this morning, to re-do the calibration, with the specific instructions I just posted above.

They were really awesome about it and recalibrated both the ride height and the rebound. They asked me for permission to test drive after they performed the task to see if it would get rid of the code/message.

No bueno.
They came back with the following:

"Upon performing TRX suspension rebound reset found level sensor valves to be concerning with left rear level sensor voltage only being at 0.2612. Will create star case to discuss with Chrysler to confirm if this valve is in normal range"

I told them cool beans, let me know when Stellantis gets back to you. Once I got home, I spent the rest of the day digging into how this system actually works. Eventually, I learned more about the sensors themselves, what they look like, how they’re mounted, and how they’re supposed to be connected.

So I am like let me go check things out with all this wealth of new knowledge lol. Maybe the rod for the sensor is bent like some other folks had.

Tell me what's wrong with this picture :

I couldn't believe it. I am almost certain this happened after I had the HD springs installed, because immediately after the install is when I started getting the message. I assumed that when you mess with the suspension, it was common and just had to recalibrate. Not sure if they pop off easily or what, or if it's even part the process (doubt it) and was forgotten to be put back on, but what's crazier is that the dealership handled my truck twice for this ADCM issue in a span of 3 days and didn't notice it.

 

[jazico]

So I finally was able to test drive the truck this morning (I wasn't able to last night, work meeting), and viola, like magic, poof the message/error is gone.

So TLDR, if you are getting the message/error in question, first thing I would do is check the sensors

 

[Dudebro]

What a bunch of rookies at the dealer for not seeing that. Easy fix

 

[JPV96]

I added the rear sway bar. Does this have to be unbolted to raise the truck and let the wheels hang fully?

 

[Ev_nev_R]

I'm so glad I came across this. My dealer has had my truck for 3 months swapping out parts and I picked it up last week with zero results. They changed the PCM, suspension control module and put in a new battery. So today I called my service rep and mentioned if they performed the suspension calibration and rebound reset after all these parts were replaced and he claims they did. I would like to take my truck to a new dealer and have them look at it. Any recommendations for a service shop in Putnam NY or Connecticut?

 

[jazico]

I'm so glad I came across this. My dealer has had my truck for 3 months swapping out parts and I picked it up last week with zero results. They changed the PCM, suspension control module and put in a new battery. So today I called my service rep and mentioned if they performed the suspension calibration and rebound reset after all these parts were replaced and he claims they did. I would like to take my truck to a new dealer and have them look at it. Any recommendations for a service shop in Putnam NY or Connecticut?

I know this sounds silly, but have you checked the ride height sensors themselves.

There are 4 of them, one for each corner. You can easily check this yourself.

Make sure none of them are bent or popped off (like it was in my case above).

Here is an example of what it may look like bent:

 

[jazico]

This is what you want to tell them:

Height Sensor Calibration (ADCM)​

• The truck must be sitting on the ground, on a flat and level surface.
• Perform the calibration only at normal ride height, do not lift the vehicle.
• This ensures all sensors read proper resting voltages and prevents incorrect learned values.

---

TRX Suspension Rebound Reset (PCM)​

• The truck must be lifted off the ground with all four wheels fully free-hanging.
• Perform the rebound reset only in this state, it’s the required method for the TRX.
• This allows the system to correctly learn suspension limits and prevents rebound or damping error codes.

@Ev_nev_R once you have checked out the sensors, make sure the dealer performs the calibrations this way. Most of them are clueless on the process of how it needs to be done.

 

[Ev_nev_R]

@Ev_nev_R once you have checked out the sensors, make sure the dealer performs the calibrations this way. Most of them are clueless on the process of how it needs to be done.

Thanks man, really appreciate this. When I get home I'll check those sensors.

 

[Ev_nev_R]

So sensors all checked out. I stopped by the dealer this morning to show them that recalibration process and they told me that they performed that with no such luck. Is there anything else these guys could be missing? As always thanks for the help.

 

[jazico]

So sensors all checked out. I stopped by the dealer this morning to show them that recalibration process and they told me that they performed that with no such luck. Is there anything else these guys could be missing? As always thanks for the help.

So, to recap, all sensors are in good shape, in place, and not bent. You have done both the Height Sensor Calibration (ADCM), and the Rebound Reset (PCM). Replaced PCM, ADCM? (is this what you meant by the suspense module?), and the battery.

 

[Ev_nev_R]

So, to recap, all sensors are in good shape, in place, and not bent. You have done both the Height Sensor Calibration (ADCM), and the Rebound Reset (PCM). Replaced PCM, ADCM? (is this what you meant by the suspense module?), and the battery.

Yes, all the sensors were connected and intact. Dealer swapped all those parts and attempted the calibration and rebound reset with no luck. They're left clueless why nothing is working.

 

[Dudebro]

If they replaced the ADCM and all the sensors and it's still doing it, they likely need to start looking at the shocks themselves.

 

[jazico]

If they replaced the ADCM and all the sensors and it's still doing it, they likely need to start looking at the shocks themselves.

Yes, I agree. I was going to ask if they started looking at other suspension areas/parts.

 

[Ev_nev_R]

I've made an appointment at the next nearest ram dealer. RAM cares recommended that someone else take a look. Hopefully they'll catch the problem quickly.