ECU Learning reset. - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

gen3v8 · 11-20-2021, 05:19 PM

So the ECU learns to some extent over time. If I want to undo what has been learnt, what is the best method.
1 Reload the OFT tune.
2 Disconnect the battery.
3 Do a ECU reset(Clear with scantool)
I`m just curious which is the best

tomm.brz · 11-20-2021, 06:24 PM

they achive the same, just delete dtc as it s simpler
Ecu learns fuel trims mostly and keeps Memory of AM if it drops

elBarto · 11-20-2021, 06:31 PM

All options are valid, but option 2 is the safest.
With option 1 you always have a (very small) chance of bricking the ECU or writing an incorrect rom.

11-20-2021, 05:19 PM	#1
gen3v8 30 minute maintenance Join Date: Oct 2020 Drives: My18 wrxsti Location: Botany Bay Posts: 1,178 Thanks: 769 Thanked 1,236 Times in 631 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	ECU Learning reset. So the ECU learns to some extent over time. If I want to undo what has been learnt, what is the best method. 1 Reload the OFT tune. 2 Disconnect the battery. 3 Do a ECU reset(Clear with scantool) I`m just curious which is the best

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11-20-2021, 06:24 PM	#2
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,277 Thanks: 515 Thanked 1,121 Times in 811 Posts Mentioned: 70 Post(s) Tagged: 0 Thread(s)	they achive the same, just delete dtc as it s simpler Ecu learns fuel trims mostly and keeps Memory of AM if it drops

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