2015 FR-S BIU/Integ Unit Assy replacement - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Conti93 · 07-07-2023, 04:27 PM

Hi all!

I've got an FR-S of a friend of mine without keyless (so blade key) which was flooded and I'm replacing the BCM/BIU aka Integration Unit Assembly.
Since it has the normal key, AFAIK, the immo info is stored in the Integ Unit Assy AND the cluster. The latter was not submerged, so it's fine; for the Integ Unit Assy unfortunately there's a pin completely missing in the MCU, so I've found an identical one (there are three version for each region.. I erred on the safe side) P/N 88281CA220.

AFAIK the immo info is stored inside this module in the 93C86, dumb question: can I simply swap the EEPROM content between the two modules?

I've attached the two files if anyone wants to take a peek.
Thanks.

Conti93 · 03-13-2025, 08:58 AM

Yes. simply swap EEPROM from the same P/N BIU and then do an ECU Communication ID reregistration as per TSB posted here.

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03-13-2025, 08:58 AM	#2
Conti93 Member Join Date: Apr 2018 Drives: '02 Speedster n°586 - '23 GR86 Location: Italy Posts: 22 Thanks: 4 Thanked 9 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yes. simply swap EEPROM from the same P/N BIU and then do an ECU Communication ID reregistration as per TSB posted here.

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