Replacing Bad RDC Module and Coding
 

Hey everyone, I have found information on other forums regarding E90 RDC replacement and coding. However, when I use NCSExpert to try and code the module, the RDC is not showing up in my ECU list in NCSExpert.

Back story: I have a 2007 BMW 530xi (built 12/2006, right after RDC was introduced) I got a "TPM Malfuntion" light in my dash and when I checked RDC module in INPA, I was getting error messages indicating all four corners were unreadable as well as a general RDC module error. I was also getting many "failure to connect to module" errors. I was thinking the RDC module was probably dead (172,000 miles) and I purchased a junkyard RDC module on eBay to replace mine and swapped it in.

However, now I am having issues coding it. I am trying to do a SG_Reset with NCSExpert to re-learn this junkyard module to my car as some E90 owners have done successfully. However, my RDC module is NOT showing up in the ECU list in NCSExpert. So I am unable to select the module to reset it. When I check the module in INPA, I can read it and check errors, but it is still not reading tire pressure sensors and I still have a TPM light.

Can someone tell me if these are the right steps and why the RDC is not showing up in my ECU menu? I updated the Daten files to v60.1 so I don't think this is a software issue. Maybe the RDC is located under another module?

1. Load NCSExpert.
2. Load Profile and select Expertmode
3. F1 (VIN/ZCS/FA)
4. F3 (ZCS/FA f .ECU)
5. Choose E60
6. Select CAS
7. F6 (BACK)
8. F4 (Process ECU)
9. Select the RDC Module to revert to stock (RDC NOT SHOWING UP)
10. F2->Choose "SG_Reset->ok

Thanks for the help!

(posting here, as this is the only place, I found the similar question and situation with e60)

Hopefully, this will help others.

The solution was to change the fuse #82 in the trunk.
(found a post about a mechanic's bad handwriting where someone figured out how to be 82 (instead of 32))

I was suffering same issue...
(also 2007 530xi); I'd replaced the unit in the trunk, and the one under the driver seat...
both with modules from ebay/salvage yard...

I had also found the info (that at least on the e90) RDC modules needed to be coded (well to do a SG-RESET); as well as some places that said on e60 where snapping the new module in the trunk was plug and play.

I couldn't see RDC ecu in any coding software (NCS, INPA, etc).

After struggling with it again over the weekend, I was seriously thinking about doing the conversion from RDC to FTM to escape the mess.

Then, it hit me that I still hadn't replaced the fuse. When I was originally searching for it, I came across the info about the RDC units being fried in the trunk due to spillage. That was certainly the case in my car, as there was a brown sticky residue of probably some cola. I got a new unit from ebay, snapped it in, and nothing. I tried another from a salvage yard from a 2008 535xi -- still no love. Then, I became convinced that the problem was the antenna under the car, and replaced that with one from the same 535xi from the salvage yard. That led me down the coding rabbit hole.

The long and the short. Replaced the fuse, got a warning about a low rear tire, did a reset, and (touch wood), everything seems to be working.

I have also relocated the sensor to the rear drivers side area below the rear tail light to prevent possible problems with future spills.