Originally Posted by RedG37SNC

I don't know about you guy's but my ECU's dumb as a rock! I've read this before about "learning how your drive", I'm not buying it though, I think it's wishful thinking. The only real learning I've seen documented is the ECU's ability to learn how to set various engine parameters like AFR, Timing, VVEL ect... however it's limited to what's mapped in tables. Case in point, I've reset the ECU dozens of times and ran for long periods yet the car would always run rich WOT(pre-tune that is.) At idle and maintaining any RPM's it would run 14.7 which is where you want to be for fuel economy.

If we're saying that if you drive it aggressively it will pick fuel and timing tables that lean more towards power over fuel economy... that would seem possible if it has multiple tables... not sure here but rather doubt it. Even if there were, Nissan's tables would more then likely be designed to compensate for different altitudes and humidity to achieve fuel economy and reliable operations leaning rich and how you drive it wouldn't make a difference.

I think we've all driven enough to know the two acceleration program behaviors and two deacceleration program behaviors and the RPMs and speeds it downshifts or upshifts. Things get a bit less predictable with the accelerometer however for the most part they're predictable and that is how I for one would prefer it.

So where is there a need and how does this "learning" manifest itself? Am I missing something here?

Originally Posted by philter25

This car definately has a learning curve and adapts to your driving. When I first got the car, I found it often stuck between gears or searching for the right gear. Same with downshifting. After about 1000 miles, it started to adapt to my lead foot and "expected" shifts and they started to be quicker.

I had my ECU and TCM reflashed last time I was at the dealership and noticed it took about 500 miles for it to re-learn my driving style. Same problems with shifting and searching for gears and upshifting and downshifting at the wrong time.

Now its used to my highway driving and ninja-like driving through traffic at 80 mph. When Im going 70 behind a guy and I press the throttle to pass him, it downshifts quickly and Im around people in seconds.

However, I could see a problem with this if you have 2 different people with drastic driving styles driving the car. My wife only drives the car if I need to take her SUV to home depot.

Originally Posted by CodeG

People need to learn how the car operates. The G will up-shift to 7th gear (to save fuel) at any cruising speed, I have seen as low as 1000 RPM. Of-course your car will not accelerates very well in 7th gear but you want to save fuel, don't you? If you want to do quick passing lane change then floor the throttle, or better yet down shift to a lower gear. The throttle on the G37 is very smart and will learn your driving style too; if you quickly stab the gas, it will reacts to the situation very quickly and perform fast down shifts. For example if you quickly stab the pedal from a stop the car will keep 1st gear longer and perform upshift at higher RPM. If you input the throttle slowly it will quickly shift into higher gear and create the condition described as laggy. Yes, in the conflicting world of fuel economy and blazing performance, you need to know how to operate the machine. You want to have more control, buy a car with manual trans. But then reading all the complaints, I feel like you people want a car that will drive itself and read your minds.

Originally Posted by CodeG

^^ I learned new thing all the time about this car too. Lately I found that as soon as the trans up-shifted early, I down shift. I did that a few times and the trans will "learn" and responds rather responsively for the whole trip. That takes care of the lag.
At first I was also complaining about the rough shifting when the car came to a stop, but now I realized it is down shifting, so I can quickly accelerates again. To me that is a sport sedan quirks, an ES Camry will not do that. But I do not want a ES Camry!
BTW I am driving an old WRX, the G is wife's car.

Originally Posted by jq1980

So are you driving in DS mode when you do the manual down shift, then back to D and it learns it that way? I haven't experimented with that. Yeah, my wife was saying something similar about how our 2001 Outback with 160,000 miles on it doesn't have the quirks of the G's tranny. Uhh, slightly different cars.