2015 TFT in 2013 Turbo - Sorry
Posted: 03 May 2026, 17:53
Hey Everyone, sorry to bring up a topic that's been a sore spot for many. I swear I spent a few hours digging. Unfortunately programming isn't my background.
I bought what I understood to be a pre-facelift TFT display (It does display the bluey logo on start), did a proxi, changed bit 65 to "40" and most things function correctly. Naturally the G force just shows zeros, interestingly my tire pressures all display about 8 psi lower than the ECU reports, and the BCM shows an intermittent error for incorrect equipment, while the dash shows a continuous bcm error.
I did try changing bit 49, but of course bluey failed, and there was one other bit I ran across I swapped from AA to BA but had no noticeable effect sitting in the driveway.
The intermittent communication error would seem to point towards a mismatch in the expected string of bits, and I believe I ran across someone with a newer TFT that added "empty" bits to the end of their proxi data to get those two talking, but best I can gather otherwise is the 2015 TFT should also expect 85 bits?
This is what I have now:
31 33 31 35 39 36 32 37 36 30 30 31 32 33 34 35 36 37 38 39 30 20 12 12 11 6F 84 00 04 03 00 00 00 29 00 00 00 03 00 00 00 81 D2 4D 06 F4 40 01 71 AA 15 00 67 00 09 00 94 03 00 02 00 01 A0 10 40 00 00 00 00 00 00 00 00 27 00 00 00 00 31 06 B1 01 00 00 00
BCM error is B10AA-4A-PROXI Configuration Control : incorrect component installed - intermittent
TFT error is U1700-86-No Body Computer : Signal/message invalid - present
Anyone out there have any thoughts or guidance? I've seen a couple of people pulling off what appears to be magic, but I don't know enough to understand exactly what happened yet. Thanks, and sorry again - I'm new to proper forums.
Edit/update : Changed byte 49 to "C0" as suggested in a couple other posts to let it fail and pull the PDF. In the PDF there was a suggestion to change the same byte to "40", which resulted in a completed proxi, but several more errors for intermittent or missing messages in the BCM. Changed bit 50 from "BA" to "AA" allowed all errors in the BCM to be cleared without reoccurring, same present/persistent error on the dash. No change to TPMS values displayed or G force indications.
Current best data packet :
31 33 31 35 39 36 32 37 36 30 30 31 32 33 34 35 36 37 38 39 30 20 12 12 11 6F 84 00 04 03 00 00 00 29 00 00 00 03 00 00 00 81 D2 4D 06 F4 40 01 40 AA 15 00 67 00 09 00 94 03 00 02 00 01 A0 10 40 00 00 00 00 00 00 00 00 27 00 00 00 00 31 06 B1 01 00 00 00
I bought what I understood to be a pre-facelift TFT display (It does display the bluey logo on start), did a proxi, changed bit 65 to "40" and most things function correctly. Naturally the G force just shows zeros, interestingly my tire pressures all display about 8 psi lower than the ECU reports, and the BCM shows an intermittent error for incorrect equipment, while the dash shows a continuous bcm error.
I did try changing bit 49, but of course bluey failed, and there was one other bit I ran across I swapped from AA to BA but had no noticeable effect sitting in the driveway.
The intermittent communication error would seem to point towards a mismatch in the expected string of bits, and I believe I ran across someone with a newer TFT that added "empty" bits to the end of their proxi data to get those two talking, but best I can gather otherwise is the 2015 TFT should also expect 85 bits?
This is what I have now:
31 33 31 35 39 36 32 37 36 30 30 31 32 33 34 35 36 37 38 39 30 20 12 12 11 6F 84 00 04 03 00 00 00 29 00 00 00 03 00 00 00 81 D2 4D 06 F4 40 01 71 AA 15 00 67 00 09 00 94 03 00 02 00 01 A0 10 40 00 00 00 00 00 00 00 00 27 00 00 00 00 31 06 B1 01 00 00 00
BCM error is B10AA-4A-PROXI Configuration Control : incorrect component installed - intermittent
TFT error is U1700-86-No Body Computer : Signal/message invalid - present
Anyone out there have any thoughts or guidance? I've seen a couple of people pulling off what appears to be magic, but I don't know enough to understand exactly what happened yet. Thanks, and sorry again - I'm new to proper forums.
Edit/update : Changed byte 49 to "C0" as suggested in a couple other posts to let it fail and pull the PDF. In the PDF there was a suggestion to change the same byte to "40", which resulted in a completed proxi, but several more errors for intermittent or missing messages in the BCM. Changed bit 50 from "BA" to "AA" allowed all errors in the BCM to be cleared without reoccurring, same present/persistent error on the dash. No change to TPMS values displayed or G force indications.
Current best data packet :
31 33 31 35 39 36 32 37 36 30 30 31 32 33 34 35 36 37 38 39 30 20 12 12 11 6F 84 00 04 03 00 00 00 29 00 00 00 03 00 00 00 81 D2 4D 06 F4 40 01 40 AA 15 00 67 00 09 00 94 03 00 02 00 01 A0 10 40 00 00 00 00 00 00 00 00 27 00 00 00 00 31 06 B1 01 00 00 00