Resetting your ECU with BIG`O

[Limbo]

Guys. Pull the fuse for 30sec OR If you can't find it pull Battery Plug for 10mins.

Then start car - Idle for 5 mins or so until the car is warm. Do not touch the accelerator whilst waiting.

Take car for a drive, revving thru slowly up to redline and let it go down slowly. Prob do this a few times just for goodluck. Then you should be fine.

I don't think i can say it any easier.

[vippy84]

If your unsure on which fuse to pull you can always undo the negative terminal of the battery.

I unplug both terminal + and - for 15 mins? will that do the resetting?

[solitz]

yeah it will vippy84

[VTAKYO]

hmm bit confused which fuse do i take out i dont have a 7.5a

and wen u said slowly rev to redline is that for everygear ..

[ECU-MAN]

you dont have to rev your car to red line.

just let it idle in Park for AT or N for MT for 10 min ( untill the thermo fans kick in twice ). make sure there is no electrical load on the car. Turn off all accesories, inc the radio.

[VTAKYO]

k thx for clearing that up
so u noe which fuse to take out ..
i have a dc5r

[Ph@t-G]

Ok I've trolled through this DIY, with one other person having the same question I have.

When removing the fuses (in my case EK1), is it the "FI E/M (ECM/PCM)" and "Back Up" fuses as listed in the owner's manual?

Nice and easy question...

Cheers

[Alpine]

When resetting the ECU does the engine already need to be warm or can it be done cold?

[XP02ED]

k thx for clearing that up
so u noe which fuse to take out ..
i have a dc5r

Just take the battery out thats what i did,

Cant seem to find anywhere what each pic means on the engine fuse box :S!
IF anyone knows or got a link pm! THANK!

[Simmo2302]

hmm.. seems to b a bit of confusion here.

this is my gist on things...

1. find ur fuses (check a manual) and unplug em for anything up to 10mins.
or
2. disconnect both battery cables for anything up to 10 mins
or
3. unplug the connector for the ECU itself, for anything up to 10mins.

once done reconnect whateva u did, and idle engine for 10mins, turn all accessories off (ie radio).

after 10 mins of idle take car for drive, changing gears at appropiate times/speeds (usually found in honda owners manual) do this for some time ie 10 mins, so ECU can learn air/fuel ratios for normal driving.

when satisfied, if u want to, drive ur car like its stolen, so ecu can learn ratios when engine is under strain (ie when racing).

can be done on cold or warm engine, or a sunny / mild day.

somebody correct me if i m wrong.

(times may vary due to personal preference)

[Alpine]

Just a warning to those who are unplugging the fuses, in particular the backup fuse which also serves the Radio...

Doing this fried my Alpine head unit completely for some reason. I had to purchase a new head unit in the end.

Beware.

[Simmo2302]

hmm... sounds like u got a power surge, but dont know y, unless u had the ignition in the on or acc position.

i dont kno about alpine, but my pioneer has a fuse (round glass type) behind the headdeck on the power line aswell (in a black case lookin thing).

if urs has it, maybe u blew it.

if not maybe as a precaution u better cut ur power line and put another fuse in there, just incase.