is the only way to reset the ecu by hitting the gas while the car is just on and not engine started? or is there an easier way then all those steps?

 

Disconnect cable from your negative terminal on battery and leave off for 12 hours

 

oh nice, that deff is alot easier.

 

Wasnt it faster to neg off, pos off, then touch em together for 10 secs?

 

yeah...i heard that works better. i dunno.

 

does that work? hey cool, i learned something new and saved myself 12 hours

 

So if you finish your break in should you reset the ecu? I behaved during my break in period....now I just floor it and go!

 

Just remember all methods besides the pedal method will cause the car to lose it's memory presets. Radio and seat, shift light etc.

 

That is very true & noteworthy. I paid the dealer to have some defaults reprogramed. Now my car doors all lock & unlock with one push of the remote.
A battery disconnect would erase the changes, wasting my money.

 

12 hours is ridiculous. Just take off the cables, hit the brakes if you think it will help (most likely won't....a myth to "drain" the last drops of electricity out of the system) and reattach the cables afterwards. Should take like a few minutes for everything.

sean

 

Use the pedal method. It is great and easy.

For those who are wondering, it works the same on the 2005 models.

I notice a big change is part throttle responsiveness after I do the ECU reset.

Also, it smooths the gear changes too (6MT). It must have something to do with the throttle position. Have I ever mentioned how much I hate "drive by wire" throttles. I would much rather have a cable operated throttle blade.

 

(most likely won't....a myth to "drain" the last drops of electricity out of the system)

How about turning head lights on? That will be the most efficient way to drain elctricity, but I have doubts about that. Most likely you need 12 hours to discharge battery for EPROM where the data is stored.

 

You are not trying to discharge your battery, you are trying discharge the ECU memory.

I've been using the pedal method, it's working every time for me now.

 

I have an 05, and tried doing this on my 04 (did not work):

G35 ECU Reset #1

1) Turn ignition on, wait 3 seconds
2) Push fully and release the gas pedal 5 times within 5 seconds
3) Wait 7 secs, fully push gas pedal and hold for 10 seconds until the CES light starts to blink
4) Release gas pedal (you are in diagnostic test mode 2)
5) Press and hold gas pedal for more than 10 seconds. Release pedal.
6) The CES light will continue to blink
7) Turn ignition off. Restart car.

What part did I do wrong? I got this from https://g35driver.com/forums/faq-diy/6538-ecu-resets.html

 

Hi All-
This may sound silly, but what does resetting the ECU do? I bought my car used and I think that it is sluggish sometimes. Will resetting the ECU help?
Thanks.