Replacing a Bricked damaged or faulty ECU with new or used ECU FRS BRZ GT 86

[Aurange]

Originally Posted by steve99

if CEL doesnt blink with loop on pins 4 to 13 on obd port (ignition must be full ON not jst accessory) then either loop is not connecting or connection to obd port bad or ecu may have problem.


put the old ecu back and see in cel blinks with loop on 4-13 and ignition full on engine stopped

The old ecu is fried but I did put it back in and the same thing is happening. By “full on” you mean the last click before starting the car correct? Also thank you for responding 🙏🏼. I have a key switch car if that makes any difference

[steve99]

Originally Posted by Aurange

The old ecu is fried but I did put it back in and the same thing is happening. By “full on” you mean the last click before starting the car correct? Also thank you for responding 🙏🏼. I have a key switch car if that makes any difference

yes on key start lasy click before starter cranks


sounds like you may have wiring issue


does car actualky start on old ecu ?


test you 4-13 loop on a friends car it wont harm to test it

[Aurange]

Originally Posted by steve99

yes on key start lasy click before starter cranks


sounds like you may have wiring issue


does car actualky start on old ecu ?


test you 4-13 loop on a friends car it wont harm to test it

No the car doesn’t start on old ecu because the ecu is fried. I was trying to fix this trash wiring job the last owner did for the gauges and accidentally blew the old ecu. I took it to a mechanic to confirm the ecu was fried and they said it was. That’s why I bought a new Ecu to get the car up and running again.

[jrhudson]

Okay so i'll be needing to replace my ECU due to P0018 code. Would this process still be the same for a push to start FRS/BRZ? also Im confused on what to replace to have the alarm system and start up working as intended. Would i need to also replace the alarm system like the immobilizer? or is the ECU/ECM the only thing needed?

[steve99]

Originally Posted by jrhudson

Okay so i'll be needing to replace my ECU due to P0018 code. Would this process still be the same for a push to start FRS/BRZ? also Im confused on what to replace to have the alarm system and start up working as intended. Would i need to also replace the alarm system like the immobilizer? or is the ECU/ECM the only thing needed?

Same process pish button start or key start, you only need to swap ecu nothing else

[jrhudson]

Okay so i swapped ecus and im trying to change the vin number via techstream but the alarmed is somehow armed and i cant disarm it. Everytime i put the car into ignition the alarm goes off. Im confused anyway so this doesnt happen?

I swapped back my original ecu and the alarm still goes off. Whenever i connect the battery even tho i havent set the car into on mode its already like this.

[steve99]

Originally Posted by jrhudson

Okay so i swapped ecus and im trying to change the vin number via techstream but the alarmed is somehow armed and i cant disarm it. Everytime i put the car into ignition the alarm goes off. Im confused anyway so this doesnt happen?

I swapped back my original ecu and the alarm still goes off. Whenever i connect the battery even tho i havent set the car into on mode its already like this.

Assume its aftermarket alarm ? you will likely need documention on how to reset or reprogram it

[jrhudson]

Originally Posted by steve99

Assume its aftermarket alarm ? you will likely need documention on how to reset or reprogram it

Its not. Its the one from the factory. I havent even gotten a chance to do the whole 30 minute learn thing yet.

I connect the battery and some lights in the car turn on.

[steve99]

Originally Posted by jrhudson

Its not. Its the one from the factory. I havent even gotten a chance to do the whole 30 minute learn thing yet.

I connect the battery and some lights in the car turn on.

https://www.gt86.org.uk/forums/forum...ctivate-alarm/


few post down is factpry alarm manual, we dont jave it in my country so i have zero knoledge on it

[jrhudson]

Originally Posted by steve99

https://www.gt86.org.uk/forums/forum...ctivate-alarm/


few post down is factpry alarm manual, we dont jave it in my country so i have zero knoledge on it

Thanks! ill try these things next. So i've tried just unplugging the physical horns and just to see if i could've done the 30min learn period. i tried it twice but it didnt work. I'm hoping it's like a ground or something.

Also i believe the ecu i got was for the MY15 manual just like mine but during the 30 min learning period the dash says A/T OIL TEMP. i've never seen that appear before, ever. Is that an indication replacement ecu i have might've been for an auto?

[steve99]

Originally Posted by jrhudson

Thanks! ill try these things next. So i've tried just unplugging the physical horns and just to see if i could've done the 30min learn period. i tried it twice but it didnt work. I'm hoping it's like a ground or something.

Also i believe the ecu i got was for the MY15 manual just like mine but during the 30 min learning period the dash says A/T OIL TEMP. i've never seen that appear before, ever. Is that an indication replacement ecu i have might've been for an auto?

ues if your getting that id say the new ecu is programmed with an auto calibration


plug ecu in and read calid from ecu


if its auto calibration and tour car manual it wont start either

[jrhudson]

Originally Posted by steve99

ues if your getting that id say the new ecu is programmed with an auto calibration


plug ecu in and read calid from ecu


if its auto calibration and tour car manual it wont start either

Yup i asked the seller and they said it was for an auto. =(

Calid for replacement ecu is d00d but my original ecu calid is D00C. When i tried to flash via ecutek with the correct calid rom (d00c) it said it wasnt compatible.

[steve99]

Originally Posted by jrhudson

Yup i asked the seller and they said it was for an auto. =(

Calid for replacement ecu is d00d but my original ecu calid is D00C. When i tried to flash via ecutek with the correct calid rom (d00c) it said it wasnt compatible.

ok thats easy fix message me ill telk you how to override ecutek rom id check

[jrhudson]

Couldn't get my key fob to disable the alarm even after the 30 min relearn period. I have a manual frs and accidentally got an auto ECU as the replacement but thanks to @steve99 assisting me in turning my auto ECU to a manual ECU.

Getting the ecutek tune in for my setup was the solution. key fob/security system was working as intended. thanks again @steve99