ScCo

Can anyone tell me how to completely reset the ECU in a 1992 maxima?

Matt93SE

iTrader: (44)

pull the engine fuse, or just disconnect the battery for at least 30 minutes. even better would be overnight, just to make sure any residual power left in the capacitors in the circuit have discharged and the ECU has no reserve power..

blah blah blah.. disconnect the battery for a couple hours.

MadMaxBrent

Either disconnect you negative lead from your battery overnight, or turn the ecu diagnostic screw into diagnostic mode and then back to its normal position. I prefer this method as I don't get blasted by the car alarm going off as I reconnect the battery lead.

Brent.

ScCo

I pulled the engine fuse and had disconnected the battery, just wanted to make sure there wasn't anything else that had to be done.

The car had been running like hell(misfiring, and dying spontaneously) so we ended up having to replace the ignition coil relay(toasted) and the car kept running bad. So I cleared the computer and it seems to be perfectly fine thus far. Hopefully everything is good now.

Thanks

Shane

flyry110

where is the ECU diagnostic screw?

mykizism

on the ECU it self like behind the head unit of ur car (tape , cd player)

and a lil lower, just get low with the car and look behind the ash tray and change holder some where in that remote area is the ecu, its some where on the ecu (the screw)

Luan

Can you guy explain somehow resetting the ECU make the car run better?

Tx

flyry110

well if you've done any mods, resetting the ECU will help. The ecu will notice the change and change everything forit.

Luan

I think that ECU will always adjust automatically for any situation it receives from all the sensors (signals).
So it will detect the changes (mods) and do the adjustment right away.
Just my two cent thought.