Jeep Garage  - Jeep Forum banner

CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

Tags
2014
19K views 36 replies 13 participants last post by  cheesesteak22 
#1 · (Edited)
SCOPE: Adding the "STOP" feature to early 2014 Jeep Grand Cherokees that came with Active Cruise Control and Forward collision Warning with Mitigation.

BACKGROUND:
Read this thread:
http://www.jeepgarage.org/f73/adaptive-cruise-control-stop-go-61316.html
Early 2014 JGCs with ACC and FCW did not have STOP and GO capability for their ACC function. Starting in July, Jeep implemented some changes and now...the vehicle has STOP and GO capability added to their Active Cruise Control. This is a significant improvement in safety, as it can bring the car down to a complete stop. It probably also improves on the Forward Collision Warning with CRASH Mitigation.

OBJECTIVE: Identify the parts and retrofit the STOP capability to early model year 2014 JGCs.

CAVEAT: We were told by Milous that older vehicles cannot have the STOP feature added on and that there have been some hardware changes. Success is therefore NOT guaranteed. I also am not willing to spend too much on this project. I do expect a few hundred dollars, maybe $1000 factoring in labor costs. I am NOT however willing to do this irrespective of costs, especially since it *might* involve additional sensors; brake lines and so on. I ain't doing that. I will just trade it in in 2017 or whenever the next major update is.

And Milous is correct, we are not talking a "reflash", a "reprogramming" of a module. But I've done some exotic things with my Subarus in the past, so I am not that worried of a module or two. I doubt this will cause any "bricking" of any car part and we are swapping OEM for OEM.

Obviously I will need some community help. And similarly I will be more than happy to provide help in both man-hours of research and/or labor and financial (as in splitting the acquisition costs) with someone willing to be the first to try it out. Now, the more people willing to do this, the better, and cheaper overall costs.

This is what I know so far.

The system is made by Bosch.

This is likely the sensor:
LRR3: 3rd Generation Long-Range Radar Sensor
Distance 0.5…250 m
Accuracy ±0.1 m
Relative speed -75 …+60 m/s
Accuracy ±0.12 m/s
LRR3 technical data sheet

A newer sensor is available from Bosch, LRR4, but not in production until next year....So it is NOT the sensor. And LRR3 appears to be made since 2009.

I took a trip to the dealership tonight to look up the difference between the ABS Control Module and the ABS Control Unit between two vehicles: mine and whatever I find new and better on the lot.

Comparing the EARLY (April 2013) JGC (EC160968) Package 23H limited
and a FRESH (Post-JULY 2013) JGC (EC272504) Package 23P Overland, the following differences are noted:

  • the 6 channel ABS Brake Pressure Modulator is seemingly built for higher pressures and incorporates 2 "blocks" for the rear channels (probably valves).
The pictures in this post are for the new hardware only:

  • ABS Module (F120400) (1732160500000) (001333524) (6/17/2013)
  • ECU 232306-107 (P) 68207920AE (T) ANHI228315078
  • Pump Motor WH1063360
 

Attachments

See less See more
6
#2 · (Edited)
Pictures in this post show the older hardware:

  • ABS module (1732160200000)(001114519)(F349000)(1/22/2013)
  • ECU 229222-126 (P) 04779975AK (T) AKHI085316681
  • no part number on the pump but this is my car so I will retake a picture
As of today:


the ABS Control Module on the OLD car P/N 68199249AC retails for $210
the ABS Control Unit on the NEW car P/N 68085397AB retails for $325
 

Attachments

#3 ·
If you can figure this out, I will definitely install it! :thumbsup: Unfortunately, I have zero knowledge in this area and will be little help to you.
 
#5 · (Edited)
And then there's the ACC Module itself, the object of a recent TSB

I will have to cross-reference these hardware pieces by part numbers by VIN and see if they are the same or different. My suspicions at this time is that the module itself is different, not the radar sensor but the control logic and supportive elements. I could be completely wrong, and I have been on occasion, but the car already has the hardware and the logic needed to activate brakes and apply them down to 15 mph. All I need it is to keep them on to zero and to detect stationary objects to further enhance it. The more I think about it, the more I think it is the controller logic of ACC not so much the secondary systems (ABS and brakes) that actuate the commands.

I have thus refined my definition of success for this endeavor. Even if it will Not bring STOP and GO functionality, as long as it slows down the car to zero and then release the brakes, I will call it a victory.

The module is pictured here
http://thumbs3.ebaystatic.com/d/l225/m/mT87Eg3Rr8ekMcZ55EZtq4A.jpg
 
#6 ·
Interesting theory, but I think you should shoot for perfect as designed. If the vehical does not come to a complete stop it may decide to throttle up or do something else crazy.
One thing of concern to me would be any dealer only updates on a vehical with a retro fit Stop and Go that did not come equipped with it, a firmware update on some other module may effect the Stop and Go system.
In any event keep on it and let's see how this go's.
 
#7 · (Edited)
I have secured the active help of people with know-how at a dealership. Don't ask how. I am able to confirm that there is at least one part different between the builds and it is suspected, at this point in time, that it is the only one. I do have the part numbers. The service manager will be calling Chrysler to find out more.

I am also working the BOSCH USA angle, whom I contacted directly. BOSCH is the manufacturer of the control modules and the sensor.

My request was described as "unorthodox but reasonable" and I was told that last year there was a guy who added the automatic headlight illumination and HIDs on a Jeep that did not come from the factory with it; installed the hardware and wiring and reflashed it and that was the end of the deal.

I have also started the investigative process for retrofitting the FRONT PARK SENSORS (FPS) from the SUMMIT. At this point in time, it actually appears that adding the FPS is more expensive than the STOP "project". I will have to make a cost-benefit analysis vs. adding a front camera and LOCKPICK C8 or whatever version whenever that becomes available.
 
#8 ·
I have secured the active help of people with know-how at a dealership. Don't ask how. I am able to confirm that there is at least one part different between the builds and it is suspected, at this point in time, that it is the only one. I do have the part numbers. The service manager will be calling Chrysler to find out more.

I am also working the BOSCH USA angle, whom I contacted directly. BOSCH is the manufacturer of the control modules and the sensor.

My request was described as "unorthodox but reasonable" and I was told that last year there was a guy who added the automatic headlight illumination and HIDs on a Jeep that did not come from the factory with it; installed the hardware and wiring and reflashed it and that was the end of the deal.

I have also started the investigative process for retrofitting the FRONT PARK SENSORS (FPS) from the SUMMIT. At this point in time, it actually appears that adding the FPS is more expensive than the STOP "project". I will have to make a cost-benefit analysis vs. adding a front camera and LOCKPICK C8 or whatever version whenever that becomes available.
Nice work! and if only one part is different as you suspect above it sounds more reasonable that this would be possible vs differences over a Varity of modules. If you have the dealer in on this to do the work and support it and cost is in the reasonable realm I would definitely be in for this. Nice work also on getting a dealer on board to work this, I don't know how you managed that but good job.
 
#10 · (Edited)
As of Monday 14 October 2013, if we were to replace these parts on these 2 vehicles:

+NH3 (with STOP) - VIN EC183329
(Mfg. after July 2013)

  • Active Cruise Control Module: 68109355AF (the radar "eye")
  • ABS Control Module: 68085397AB
  • ABS Module: 68225501AE MSRP @ $417.00

+NH1 (without STOP) - VIN EC160968 (Mfg. in April 2013)

  • Active Cruise Control Module: 68109355AF (the radar "eye")
  • ABS Control Module: 68085397AB
  • ABS Module: 68199249AH MSRP @ $315.00
As of right now, it is believed the difference rests ONLY in the ABS Module, which can be clearly seen in my pictures as being different. I suppose my first hunch was correct. My connection has e-mailed the factory for additional feedback. i am yet to hear from BOSCH USA.

HELP: Whoever is interested in seeing this progress, they could e-mail BOSCH and check with the dealership as well. And obviously provide feedback here.
 

Attachments

#11 ·
As of Monday 14 October 2013, if we were to replace these parts on these 2 vehicles:

+NH3 (with STOP) - VIN EC183329 (Mfg. after July 2013)

  • Active Cruise Control Module: 68109355AF (the radar "eye")
  • ABS Control Module: 68085397AB
  • ABS Module: 68225501AE MSRP @ $417.00
+NH1 (without STOP) - VIN EC160968 (Mfg. in April 2013)

  • Active Cruise Control Module: 68109355AF (the radar "eye")
  • ABS Control Module: 68085397AB
  • ABS Module: 68199249AH MSRP @ $315.00
As of right now, it is believed the difference rests ONLY in the ABS Module, which can be clearly seen in my pictures as being different. I suppose my first hunch was correct. My connection has e-mailed the factory for additional feedback. i am yet to hear from BOSCH USA.

HELP: Whoever is interested in seeing this progress, they could e-mail BOSCH and check with the dealership as well. And obviously provide feedback here.
I asked my dealer about this and they wont touch it. If you have a contact that is talking with the factory that is likely the best hope. One $400 piece of hardware would not be bad but I wonder what potential there is for different software loads on other interfacing modules. The right factory contact is probably the key.
 
#12 ·
Dealer told me they will not assist with a braking system component that the vehical did not have from the factory. This leads me to believe that any module firmware update for the ACC with stop function that would be needed I will not be able to get it from my dealer unless the Vin number matches that option. Your factory connection is our best bet for this endeavor.
 
#16 ·
I do not have a factory connection. I just happen to have come across forward thinking people. Getting a dealer to cooperate with your request is dependent on a number of things: making it clear who foots the bill; showing that you are not replacing intended basic function; that the parts you are requesting are bolt-on identical parts, though one is an upgrade. Then, there's the other thing: parts can be added to your VIN - all those little things you get added as a dealership option. Could be fog lights; could be roof bars could be the upgraded navi (like a 730 unit of the older Jeeps swapped over a 430 - or a new RA3 which gets the navi portion activated later). Flashes are NOT VIN dependent but components dependent. The VIN acts like a catalog of components making it easy to keep track of firmware upgrades. Again...depends on the unique relationship you have with your dealer. I will continue to pursue this though.
 
#13 ·
I'm thinking the dealer didn't want to touch it for many reasons, most likely because of safety. Wouldn't want the liability if your brakes failing. As for retro fitting to have the stop go feature, there is a possibility for it to be added to the module but it could also need other hardware like many others have found with the difference in the module part numbers. This would be one of those trial and error project to find out. I don't know the sales code off by heart, but if you talk to ur dealer's parts guy that has good experience with starparts, could find out by filtering parts by sales code if any hardware is different from yours. I could try asking the engineers but they wouldn't be much help, since they don't know much about retrofitting an option such as this that was not factory installed. I will also look into any info I can get through my login for dealer connect. Any tsbs or star cases I can look into also. Will keep you posted on my findings.
 
#14 · (Edited)
Looking more into it, do u have a Forward Facing Camera (FFC)?
I found some info on the FCW+ system and on how it is intended to work.
Hardware (2014 Grand Cherokee, Cherokee, and Durango only)
The primary sensors used for this feature include the forward facing radar located in the front of the vehicle in the grill texture and the forward facing camera located inside the vehicle near the rear view mirror. The forward facing radar using input from several other sensor to understand both driver intent and vehicle dynamics. These sensors included steering wheel angle, vehicle yaw rate, brake switch status, and throttle input. If the system determines the driver is actively driving and aware of the environmental conditions, it will suppress the warning assuming the driver is in control. Environmental factors also have impact on the function including snow, rain, fog, road condition and road slope.
To enable the feature
- The small LED on the Forward Collision Warning button on the center stack must not be lit.
- The vehicle must be traveling greater than 5mph.
The Forward Collision Warning system is not intended to do the following.
- The system will not bring the vehicle to a complete stop!
- The system cannot account for all driving scenarios!
- The Active Braking will not react on stationary licensable vehicle unless determined by both the Forward Facing Camera and Radar.
- The Active braking will not react on Street Signs, Guard Rails, Pedestrians, Animals, or other stationary objects. You will receive an audible and visual alert only for these objects if conditions are met.
Radar/Camera Fusion
To reduce the number of false positives in previous systems we have integrated Forward Facing Camera information with radar information to improve the robustness of the system.
- These improvements include redundant information to confirm automatic braking on stationary licensable vehicles which are classified as Cars, Trucks, Motorcycles, and Trailers.
- The forward collision warning system will still provide an audible/visual warning only on stationary objects which are not classified as vehicles if the conditions are met.
- Automatic Braking will be provided on moving objects with Radar only classification. This is the same amount of braking as maximum ACC braking.
NOTE: The system is not designed to replace attentive driving, it is only provided as assistance to the driver. Please see the owner’s manual for more information.

I took what training course they have for this system, and i remember in it saying this will not completely stop the vehicle if you do not react, it will however add aditional braking force if thinks you are not apply enough pressure to the brake pedal for the vehicle to stop without hitting the other vehicle.

And as for the tsb on the ACC, all i see is one for it not operating over 55 mph. Just a flash update.
 
#15 ·
Good point,

I believe the camera that you are talking about is the triangle shaped form seen in this picture, behind the rear view mirror. I also have some other sensor by the mirror, which probably controls the automatic lights and wipers.

Seen better in this picture...



whereas by comparison, the 2011-2013 vehicles do not have that kind of mirror assembly. I think this Forward Facing Camera we got covered.

 

Attachments

#17 ·
If anyone else wants to help, I would like you guys to check on the rest of the components: Master Brake Cylinder; ABS Sensors; this Forward Facing Camera. There's more work to be done...but we are already seeing that it is not about sensitivity of detection but rather brake modulation. Please use the VIN used in POST # 10.
 
#19 ·
#23 ·
Interesting, I hope the guy keeps us informed.
I have done little progress - well maybe considerable progress depending how you look at it.

- Bosch told me that I should call Jeep.
- After I called Jeep, several days later I received a message along these lines: "Currently Chrysler does not have a retrofit kit to add STOP functionality to vehicles that did not come with it. Jeep engineers do not recommend installing components to the car that were not part of the original specification".
- I have sold some old Subaru car parts to acquire funds for the ABS control module.

This statement did not answer my question which was very specific as to what parts were different between different vehicles. I did not really expect the answer, as the question came from a consumer not from a dealer tech. The good news, as I interpreted the answer, is that it can be done, otherwise the answer would have been along the lines that the work involved so obscure that it cannot be done and it would void the warranty. I am still working the dealer angle.
 
#27 ·
I am still working on it.
I got a message recently on this subject matter from Chrysler, working the dealership angle.

ANSWER
Chrysler would not advocate modifying a vehicle with options that were not available at time of purchase, especially whensafety would be involved. We would not be able to track the vehicle for recall purposes.
QUESTION
I have a technical question. I have a customer that purchased a Jeep Grand Cherokee (EC160968) that is equipped with adaptive cruise (NH1) and he wants to change it to adaptive cruise with stop (NH3). He gave me the vin number to a Jeep Grand Cherokee (EC183329) that is equipped. It seems there was a mid-year change in the Grand Cherokee. Hardware wise I see the ABS modules are different. My question is if you can tell me what hardware is different and is there software we can install to make the customer’s Jeep have the adaptive cruise with stop feature?
I understand their answer, and I respect it. But it will not deter me and also serves to confirm my suspicions: it is possible. I will attempt this swap sometime in 2014 after, allowing Chrysler more time to clarify and solve any possible recalls for this system. The worst that can happen is I pay twice labor and once for this particular newer ABS controller - in case I have to go back to the non-STOP original configuration.
 
#28 · (Edited)
I am still working on it.
I got a message recently on this subject matter from Chrysler, working the dealership angle.

ANSWER
QUESTION
I understand their answer, and I respect it. But it will not deter me and also serves to confirm my suspicions: it is possible. I will attempt this swap sometime in 2014 after, allowing Chrysler more time to clarify and solve any possible recalls for this system. The worst that can happen is I pay twice labor and once for this particular newer ABS controller - in case I have to go back to the non-STOP original configuration.
Do you really think that changing to the updated ABS controller is all that is needed? and that the rest of the systems will just sink up with the updated controller? If so that would not be that bad. You could do that on your own install it bleed the system, it cant be that easy though can it?
 
#29 ·
It will also need reprogramming. That is where schmoozing is involved - because I believe that the individual systems can be flashed and made functional.

But like the official statement was...Chrysler would not know that my car has NH3 if there was some update down the road, to send me a recall letter. Or maybe there is a way to update their knowledge database but the first attempt is to discourage people. Put it this way - they don't want to pay for it or assume liability. And I am cool with that. As far as tracking is concerned, if I purchased a non-navi enabled RA3 and I later decide to activate Navi, they have a way of tracking that right?

I will work on this in spring/summer.

I also want tor retrofit SUMMIT trim front Parksense sensors, though I will likely start with a camera and the Lockpick. For now, I only have funds for the ACC and Lockpick projects.
 
#30 ·
It will also need reprogramming. That is where schmoozing is involved - because I believe that the individual systems can be flashed and made functional.

But like the official statement was...Chrysler would not know that my car has NH3 if there was some update down the road, to send me a recall letter. Or maybe there is a way to update their knowledge database but the first attempt is to discourage people. Put it this way - they don't want to pay for it or assume liability. And I am cool with that. As far as tracking is concerned, if I purchased a non-navi enabled RA3 and I later decide to activate Navi, they have a way of tracking that right?

I will work on this in spring/summer.

I also want tor retrofit SUMMIT trim front Parksense sensors, though I will likely start with a camera and the Lockpick. For now, I only have funds for the ACC and Lockpick projects.
Changing out the controller is easy/affordable enough but reflashing associated modules with firmware that was not intended for that vehicle that is the show stopper. My dealer and I am sure most would never touch that. If you have an in with your dealer I could see why it would work for you. Good luck let us know how it goes.
 
#31 ·
I drove to northern California from southern California last week and used it for much of the trip both ways. It is what all of us have probably always wanted from cruise control. You set a following distance, then a maximum speed. Being able to move your legs is very helpful on long trips.
 
#37 ·
Do you have the wireless reprogrammed or is there a way to flash the system using the OBDII port?

I talked to my dealer about having the ABS module replaced and they seem to be fine with doing that, it's just the reprogramming of a vehicle outside of the VIN they didn't want to do.

If I get this installed what's the process for reprogramming look like?
 
#35 ·
I would be very interested in an update on this project. If you are somehow able to flash the software and provide instructions on the steps that would be huge!!!!

I called chrysler and my local dealer, they said they are locked into only providing updates based on what my VIN came with. They said that short of having chrysler updating my VIN they wont be able to flash with any non-approved software.

It sounds like changing the ABS module isnt the issue (if that is the only component that requires changing)

Someone please provide an update!!
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top