reset pcm computer

[qwerty247]

is there a specific way to reset the computer?

i heard you need to disconnect battery and then turn key?

or you just need to disconnect the battery neg ?

does it need to be disconnected for a certain length of time?

thanks for any advise

[90xj06]

what year.

[qwerty247]

sorry, its a 97 xj.
thanks

[90xj06]

and most likely just unhook the battery. just to be safe leave it unplugged over night. that way it will defiantly reset.

[qwerty247]

will it 'relearn' immediately or will it take a few days of driving around?

thanks again

[qwerty247]

also is it enough to just disconnect the neg on battery or need to do neg and pos?

[90xj06]

do the pos and cover the terminal with a rag.