machine

While perusing the service manual, I came across the procedures for "Accelerator Pedal Release Position Learning", "Throttle Valve Closed Position Learning" and "Idle Air Volume Learning". What everyone else (incl TechnoSquare) calls "resetting the ECU", Nissan calls "Idle Air Volume Learning". So I compiled the procedures with relevant data and no "fluff" into a single document.

I apologize if this has been done before...

NoahzBurnt

iTrader: (10)

I'm confused.....I have been looking for the overall ECU reset to see if it quickens my car after adding bolt-on's.

What exactly does following your pdf result in?!?

Z BOY

iTrader: (41)

resetting ecu sends it back to stock a/f maps; it then has to relearn and re-adapt gradually to your new mods, so doing it can actually lower your performance initially. the benefit is that it extinguishes the cel in some cases.

machine

As I understand it...

After bolt-ons it can help to force the ECU to re-learn the air-flow pattern and sensor inputs. The procedure Technosquare describes as an "ECU reset" is really the "Idle Air Volume Learning" procedure, so it can help adjust the A/F ratio if you'd added mods to allow more air in/out.

seanlaw

iTrader: (4)

i actually did the first part of technosquares ecu reset yesterday...i did notice that the car seemed to run a little bit different after the reset. (smoother in my opinion). but looking at the pdf...that third step, in the nissan one, seems to be different than the first step of technosquare's

maybe i'll try that nissan one...it couldn't hurt i guess considering after i reset the ecu i went and bought a k&n drop in...probably should do it again anyways

Brandon@Forged

Moved.

machine

Um, ok, why? This applies to 350Z's in general doesn't it?

F2CMaDMaXX

iTrader: (2)

This appears to be incorrect.

The procedure is the same as the Idle air re-learn up until step 8. Instead of releasing within 3 seconds of the CEL going solid, you do the following;


4. Fully release the accelerator pedal (while the CEL is still blinking)

5. Wait about 10 second.

6. Fully depress the accelerator pedal and keep it for more than 10 seconds.

7. Fully release the accelerator pedal (The CEL light will continue to blink but at a a faster rate).

8. Turn ignition switch to ?OFF? position and now you can start the car. The CEL light should be gone.

If the CEL light continues to remain ON, repeat the above steps. Timing is EXTREMELY critical to resetting the ECU.

djamps

iTrader: (1)

disconnect the battery, hold the brake pedal down for 30 seconds... reconnect battery... done. No point in the pedal dance if you just want to clear CEL and reset fuel trims.

F2CMaDMaXX

iTrader: (2)

This is an option i you don't want to mess under the hood and lose your radio presets.

I do wish to know if the only thing it does, is reset/clear the CEL and reset the fuel trims though. I can clear learned fuel through Cipher.

djamps

iTrader: (1)

**** then if you have cipher there's no point in pedal dancing or losing presets.

F2CMaDMaXX

iTrader: (2)

Heh, well this is my question, is all the reset doing, just clearing the learning fuel trims?

djamps

iTrader: (1)

And CEL's, yes.

F2CMaDMaXX

iTrader: (2)

Hmm, so long as i don't have any CEL's, which Cipher will clear anyway, then clearing the learned fuel trims are the only things left over.