Engine Won't Start (ECU FLASH) MY2017 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

kasugasorata98 · 11-07-2022, 01:30 PM

Hi everyone,

My car is the Toyota 86 2017 Facelift model.

Without enough research, I went ahead and flashed 2013 rom on the ECU which may have bricked my ECU. I am unsure if it's fully bricked as I am still able to read and write to the ECU using ECU FLASH. However my engine no longer starts.

I have seen a post from steve99 https://www.ft86club.com/forums/show...10&postcount=1

that says, "K00x roms are for 2017 cars only, do not flash earlier roms to 2017 cars else you will trigger a security lockout and car will not start . you will need to perform the ECU replacement ecu resync proceedure to get car to start after flashing back a 2017 rom."

Things I have done,
- Removed battery and insert back
- Flashed 2017 Roms
- Flashed my stock rom with no definitions (create from scratch)

None of these has worked because the ecu is probably in security lock mode.

Is there anyone who knows how to reset the ecu so that I can remove the security lock mode and start my engine?

As of now, my ecu is flashed with my stock rom which is ZA1JK01B

Would really appreciate you guys on your inputs to this thread.

tomm.brz · 11-07-2022, 02:05 PM

here procedure
https://www.ft86club.com/forums/showthread.php?t=102810

AussieBRZ · 11-07-2022, 03:21 PM

As Tom says above use that proceedire to rescny security

Flash back a Stock rom then

Just perform steps 7 through to 14 in the procedure above

That will rescnc the security and car will Start, done it several times will be fine

kasugasorata98 · 11-07-2022, 08:07 PM

Thanks so much for the replies guys. Glad to know this is the solution. I will update once I get my hands on a jumper.

Is anyone also able to answer if ZA1JK01B car is compatible with ZA1JK00G rom from OFT?

AussieBRZ · 11-08-2022, 05:05 AM

Quote:

Originally Posted by kasugasorata98

Thanks so much for the replies guys. Glad to know this is the solution. I will update once I get my hands on a jumper.

Is anyone also able to answer if ZA1JK01B car is compatible with ZA1JK00G rom from OFT?

If it's a 2017-2021 manual then K00G will work

If it's auto 2017-2021 then use K01I

kasugasorata98 · 11-09-2022, 08:30 AM

Just a bit of an update, the solution provided by tomm.brz & AussieBRZ worked. I have flashed K00S onto my car and it worked just as fine.

tomm.brz · 11-09-2022, 09:13 AM

credit to him, he did all the job. Thanks Steve

11-07-2022, 01:30 PM	#1
kasugasorata98 Junior Member Join Date: Nov 2022 Drives: Toyota 86 2017 Facelift Location: Malaysia Posts: 3 Thanks: 0 Thanked 2 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Engine Won't Start (ECU FLASH) MY2017 Hi everyone, My car is the Toyota 86 2017 Facelift model. Without enough research, I went ahead and flashed 2013 rom on the ECU which may have bricked my ECU. I am unsure if it's fully bricked as I am still able to read and write to the ECU using ECU FLASH. However my engine no longer starts. I have seen a post from steve99 https://www.ft86club.com/forums/show...10&postcount=1 that says, "K00x roms are for 2017 cars only, do not flash earlier roms to 2017 cars else you will trigger a security lockout and car will not start . you will need to perform the ECU replacement ecu resync proceedure to get car to start after flashing back a 2017 rom." Things I have done, - Removed battery and insert back - Flashed 2017 Roms - Flashed my stock rom with no definitions (create from scratch) None of these has worked because the ecu is probably in security lock mode. Is there anyone who knows how to reset the ecu so that I can remove the security lock mode and start my engine? As of now, my ecu is flashed with my stock rom which is ZA1JK01B Would really appreciate you guys on your inputs to this thread.

11-07-2022, 03:21 PM	#3
AussieBRZ Senior Member Join Date: Aug 2022 Drives: WRB BRZ Location: Australia Posts: 112 Thanks: 14 Thanked 51 Times in 36 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	As Tom says above use that proceedire to rescny security Flash back a Stock rom then Just perform steps 7 through to 14 in the procedure above That will rescnc the security and car will Start, done it several times will be fine Last edited by AussieBRZ; 11-07-2022 at 03:32 PM.

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11-07-2022, 02:05 PM	#2
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,196 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	here procedure https://www.ft86club.com/forums/showthread.php?t=102810

11-07-2022, 08:07 PM	#4
kasugasorata98 Junior Member Join Date: Nov 2022 Drives: Toyota 86 2017 Facelift Location: Malaysia Posts: 3 Thanks: 0 Thanked 2 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thanks so much for the replies guys. Glad to know this is the solution. I will update once I get my hands on a jumper. Is anyone also able to answer if ZA1JK01B car is compatible with ZA1JK00G rom from OFT?

11-09-2022, 08:30 AM	#6
kasugasorata98 Junior Member Join Date: Nov 2022 Drives: Toyota 86 2017 Facelift Location: Malaysia Posts: 3 Thanks: 0 Thanked 2 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Just a bit of an update, the solution provided by tomm.brz & AussieBRZ worked. I have flashed K00S onto my car and it worked just as fine.

11-09-2022, 09:13 AM	#7
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,196 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	credit to him, he did all the job. Thanks Steve

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