Damaged Modules

[ZEEP]

Hello,
My 2020 Jeep Wrangler JL 2.0 Sport S was drove into a deep water, RF Hub and possibly BCM were damaged. (got a bunch DTCs).

Questions:
1. Can I replace the modules from the donor vehicle (plug-and-play) to keep my vehicle work properly?
2. Do donor modules need to be programmed?
3. Does the donor's trim, engine and year of manufacture matter?

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[alphawolff]

You need new modules, and they must be programmed at the dealer. Your entire interior wiring is compromised if the damage has reached as high as the RFH. I would not be surprised if new modules fail to program, if the modules are even the issue.

I would strongly suggest performing no repairs on this vehicle. The correct repair is an entire interior gut accompanied by a replacement of all interior wiring and electronics that were submerged.

 

[Cips]

This may help a lot.
https://www.jlwranglerforums.com/forum/threads/2019-rubicon-jlu-flood-restoration-project.83289/

 

[ZEEP]

You need new modules, and they must be programmed at the dealer. Your entire interior wiring is compromised if the damage has reached as high as the RFH. I would not be surprised if new modules fail to program, if the modules are even the issue.

I would strongly suggest performing no repairs on this vehicle. The correct repair is an entire interior gut accompanied by a replacement of all interior wiring and electronics that were submerged.

There is no dealer in my country and no new parts for this car, just donors.
I cleaned all the parts, connectors and harnesses, the only thing I found was a corroded RF Hub.

I can open and close the doors with the key fob, radio, air conditioner and power windows working, but car won't start.
Display Shows: CEL, ABS and ESC on display.

Car started only once, but maybe in Limp Mode.
No power steering, no headlights, maximum 2000 RPM and the Electronic Throttle Body Control on display.

Bunch of DTCs in JScan Advanced, file attached.

 

[alphawolff]

If the RFH is corroded like that then it indicates the entire interior was submerged. Your wiring will be heavily compromised, and all electronic components below that water line must be replaced. You will not be able to visually find all the damage, and once corrosion has begun you cannot clean it. It is a chemical reaction and will return. Stuff that works now will fail in the near future.

If you have like-donors you will need to transplant the entire interior. Some modules can be properly re-configured with Jscan, but immobilizers like the BCM and RFH must be replaced with new and programmed using the factory wi-tech scanner.


I do not know where you are located or what your current circumstances are, but it would be significantly cheaper and easier to repair just about any donor vehicle than to tackle this repair. Using MSRP prices you're talking tens of thousands in parts, not including labor. Unless this is a passion project, then by all means go for it. Cips posted a good run down of a similar repair. Most exterior items are weather sealed other than stuff like the PDC.

 

[ZEEP]

This may help a lot.
https://www.jlwranglerforums.com/forum/threads/2019-rubicon-jlu-flood-restoration-project.83289/

Thanks, I'll take a look, but my car wasn't completely underwater.

If the RFH is corroded like that then it indicates the entire interior was submerged. Your wiring will be heavily compromised, and all electronic components below that water line must be replaced. You will not be able to visually find all the damage, and once corrosion has begun you cannot clean it. It is a chemical reaction and will return. Stuff that works now will fail in the near future.

If you have like-donors you will need to transplant the entire interior. Some modules can be properly re-configured with Jscan, but immobilizers like the BCM and RFH must be replaced with new and programmed using the factory wi-tech scanner.


I do not know where you are located or what your current circumstances are, but it would be significantly cheaper and easier to repair just about any donor vehicle than to tackle this repair. Using MSRP prices you're talking tens of thousands in parts, not including labor. Unless this is a passion project, then by all means go for it. Cips posted a good run down of a similar repair. Most exterior items are weather sealed other than stuff like the PDC.

I checked all modules and wiring and found no problems except for the RF Hub.
Because i want to know what set of modules i can change to start the car without programming.

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