I read somewhere there is a way to reset ECU with two turn of the screw back and forth. Has anyone done it? Where are instructions for that?
Thanks
Nick

 

for 4th gen maxima 95-99.

 

For 2000-2001 ECUs, just leave the negative battery terminal disconnected overnight.

 

I know i can leave battery disconnected overnight, that works fine. But I read about that screw procedure. Thats what I am asking.
Nick

 

How long does it take to re-learn airflow, as in an intake?

 

Again, that works only on pre-2000 ECUs.

 

the screw terminal is located on the drivers side right kick panel(under the center of dash) That is only applicable as kratz noted. Our cars have two holes in the same location, however they are merely exposing the inside of the ecu. To reset the ecu and pull the codes, unfortunately you'll need ahandheld code reader or go to auto zone. If you simply want to reset, you can remove the termianl for more than an hour, or you can remove both and touch them together, grounding the residual electricity, and therefore eliminating your hour wait. Or you can open the opposite side panel of the ecu, just take the plastic kicker out, and unplug the ecu harness by flipping the lock arm to the right, and pulling it out, note there are tabs locking the arm you'll need to depress.

 

I got that, I meant about unplugging the neg. terminal.

 

Thanks a lot

 

hey newb... my advice is to not be a smartazz - especially not to Ice - he's one of the most helpful/knowledgeable members here.... AND he's a mod - which means he can boot your azz...

 

the ecu will take ~15 minutes to totally relearn its equipment, during this time you will notice idle/drivability changes, erratic behaviour, etc. if you have had your ecu updated with the consult II from the dealer, you will lose your updates, such as the fuel cut tsb, etc.. but you'll lose those any time you lose battery for an hour or more.

 

what? That doesn't make any sense. Fuel Cut TSB in particular--that's a Flash ROM update, it is NOT going to be clobbered by this ECU reset. Read about the difference between ROM, RAM, and battery-backed Non Volatile RAM sometime.

 

Hey Jedi,
I thought i was being polite. I sais "Thanks" to all the comments. If his reply wasn't understandable, then i just restated the question. Thats all.
Nick

 

if you unplug the ecu from the harness, and you have gotten the fuel cut reflash, several people have noted a return of the 14-1800 rpm fuel cut.

 

As sprillis said, once it is flashed, it is permanent.

I've had the fuel TSB reflash and unplugged the ECU numerous times...no difference.

 

Hey, Alex....you once posted that u did not like the after-effects of the fuel cutoff TSB -indeed, that it caused 'other issues'.....can u comment some more on those issues and what other problems this TSB caused?

Thks
Galo

 

Well first, it didn't 100% fix the fuel cut. Second, it added a cold start hesitation/surging. Third, seat of the pants says slightly less throttle-response and throughout powerband loss.

All that and it's still worth the less sensitive on/off bucking throttle sensitivity IMHO.