ECU locked - can I just replace it? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

steve99 · 07-19-2018, 09:48 PM

Quote:

Originally Posted by jtz54

I verified the comms is working. Was able to read realtime info using an ODBII reader and also with the OFT. Trying to read ECU using OFT still does not work.

I ordered an ECU off eBay that matches my car. I hope it isn't flashed. When I swap in the ECU do I have to change VIN# or mess with immobilizer system or is that info in a different place?

no you don't have to change VIN its just a reference, not used for security sync. The vin is in different chip in ecu , imobilier doent care in vin different

Car will start and run fine with different vin.

just do the 30 minute (at least 30) loop 4-13 with ignition FULL on not accessory. CEL light should flash entire time

jtz54 · 08-20-2018, 10:41 AM

Bought an ECU off eBay. Noticed it is an "HE" vs an "HY" unit and my FR-S is the 6 speed automatic (Seller didn't say what car except 2013-2015 FR-S). Swapped the units with the battery disconnected. Now the car starter won't engage??? Was wondering if the unit was from a manual car and it was looking for a clutch disengagement signal. Anyone know about this and how to correct it (swapped the original back in and it starts fine)?

Ultramaroon · 08-20-2018, 12:49 PM

Did you follow Steve's procedure?

jtz54 · 08-20-2018, 01:27 PM

Was Steve's procedure just turning the ignition to on for 30 minutes without starting it? All the lights came on but wouldn't engage the starter.

Sent from my SM-G955U using Tapatalk

Ultramaroon · 08-20-2018, 02:57 PM

No. Read again. Did the CEL flash for that 30 minutes? You have to jumper a couple leads before turning on the ignition.

jtz54 · 08-20-2018, 03:31 PM

"just do the 30 minute (at least 30) loop 4-13 with ignition FULL on not accessory. CEL light should flash entire time"

So......short pins 4 & 13 then turn on the ignition without starting and watch for CEL light to flash for at least 30 minutes?
Is there a pinout of the ECU is this covered in another thread? Thanks for the info and patience!

Ultramaroon · 08-20-2018, 03:50 PM

Quote:

Originally Posted by jtz54

"just do the 30 minute (at least 30) loop 4-13 with ignition FULL on not accessory. CEL light should flash entire time"

So......short pins 4 & 13 then turn on the ignition without starting and watch for CEL light to flash for at least 30 minutes?
Is there a pinout of the ECU is this covered in another thread? Thanks for the info and patience!

No offense but take some time to read all of Steve's responses to you in your own thread. In post 4 he linked you right to his procedure which includes all those details. He's done a shit ton of work to help us all. We just have to dig a little.

08-20-2018, 10:41 AM	#16
jtz54 Member Join Date: Jun 2018 Drives: 2015 Scion FR-S Location: Arizona Posts: 14 Thanks: 5 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Bought an ECU off eBay. Noticed it is an "HE" vs an "HY" unit and my FR-S is the 6 speed automatic (Seller didn't say what car except 2013-2015 FR-S). Swapped the units with the battery disconnected. Now the car starter won't engage??? Was wondering if the unit was from a manual car and it was looking for a clutch disengagement signal. Anyone know about this and how to correct it (swapped the original back in and it starts fine)? Last edited by jtz54; 08-20-2018 at 11:07 AM.

08-20-2018, 12:49 PM	#17
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,871 Thanks: 52,137 Thanked 36,522 Times in 18,923 Posts Mentioned: 1107 Post(s) Tagged: 9 Thread(s)	Did you follow Steve's procedure? __________________ service manuals

08-20-2018, 02:57 PM	#19
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,871 Thanks: 52,137 Thanked 36,522 Times in 18,923 Posts Mentioned: 1107 Post(s) Tagged: 9 Thread(s)	No. Read again. Did the CEL flash for that 30 minutes? You have to jumper a couple leads before turning on the ignition. __________________ service manuals

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08-20-2018, 01:27 PM	#18
jtz54 Member Join Date: Jun 2018 Drives: 2015 Scion FR-S Location: Arizona Posts: 14 Thanks: 5 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Was Steve's procedure just turning the ignition to on for 30 minutes without starting it? All the lights came on but wouldn't engage the starter. Sent from my SM-G955U using Tapatalk

08-20-2018, 03:31 PM	#20
jtz54 Member Join Date: Jun 2018 Drives: 2015 Scion FR-S Location: Arizona Posts: 14 Thanks: 5 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	"just do the 30 minute (at least 30) loop 4-13 with ignition FULL on not accessory. CEL light should flash entire time" So......short pins 4 & 13 then turn on the ignition without starting and watch for CEL light to flash for at least 30 minutes? Is there a pinout of the ECU is this covered in another thread? Thanks for the info and patience!

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