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  #1  
Old 10-08-2013, 09:07 PM
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CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

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:
Adaptive Cruise Control Stop-go
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
Quote:
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
Attached Images
File Type: jpg WP_20131008_009.jpg (336.7 KB, 78 views)
File Type: jpg WP_20131008_010.jpg (317.0 KB, 71 views)
File Type: jpg WP_20131008_012.jpg (262.6 KB, 65 views)
File Type: jpg WP_20131008_014.jpg (371.1 KB, 71 views)
File Type: jpg WP_20131008_016.jpg (297.9 KB, 74 views)
File Type: jpg WP_20131008_017.jpg (417.1 KB, 62 views)
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  #2  
Old 10-08-2013, 09:07 PM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

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
Attached Images
File Type: jpg WP_20131008_005.jpg (348.5 KB, 42 views)
File Type: jpg WP_20131008_026.jpg (270.7 KB, 44 views)
File Type: jpg WP_20131008_029.jpg (457.1 KB, 42 views)
File Type: jpg WP_20131008_007.jpg (308.6 KB, 39 views)
File Type: jpg WP_20131008_008.jpg (475.4 KB, 48 views)
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  #3  
Old 10-08-2013, 09:13 PM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

If you can figure this out, I will definitely install it! Unfortunately, I have zero knowledge in this area and will be little help to you.
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Old 10-08-2013, 10:16 PM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

Quite an ambitious project..
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Old 10-09-2013, 08:41 AM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

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...cZ55EZtq4A.jpg
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Old 10-09-2013, 03:45 PM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

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.
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Old 10-11-2013, 03:32 PM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

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.
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Old 10-11-2013, 03:52 PM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

Quote:
Originally Posted by f1anatic View Post
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.
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Old 10-12-2013, 06:43 AM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

This is some great stuff. Sounds very promising and the FPS project is one of great interest also. Glad to hear the dealer connection is good to inquire with Chrysler on this.
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Old 10-14-2013, 05:05 PM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

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.
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File Type: jpg ABS Module.JPG (66.8 KB, 54 views)
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Old 10-14-2013, 05:29 PM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

Quote:
Originally Posted by f1anatic View Post
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.
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Old 10-14-2013, 05:59 PM
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Re: CROWD PROJECT: Retrofitting "STOP" on the 2014 JGCs with ACC

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.
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