Why Did My Z, Keep Revving? Video.

semtex · 02-05-2010, 08:35 AM

Btw, TW -- in spite of my admittedly snarky tone above (I haven't had my coffee yet), I am happy for you that you got this fixed. I'm sure it was annoying that your car did what it did, not to mention a little unnerving. In fact, I think this confirmed diagnosis is quite significant in that it's the first confirmed incident of SRM malfunctioning (isn't it?). To be honest, I'm quite surprised that we haven't seen more cases of SRM malfunctioning sooner. It's new technology, after all, and the 09 370Z is the first implementation of this new tech. When I got my Z with the sport pkg., part of me felt that I was taking a big gamble getting a car with a brand new feature that isn't on any other cars yet. I have to say that overall I'm very pleased with how well SRM has held up after owning my Z for over a year. But now that we have our first confirmed case of SRM going bad, we'll need to keep a more watchful eye on this, I think.

TheWeatherman · 02-05-2010, 08:49 AM

Quote:

Originally Posted by semtex

Btw, TW -- in spite of my admittedly snarky tone above (I haven't had my coffee yet), I am happy for you that you got this fixed. I'm sure it was annoying that your car did what it did, not to mention a little unnerving. In fact, I think this confirmed diagnosis is quite significant in that it's the first confirmed incident of SRM malfunctioning (isn't it?). To be honest, I'm quite surprised that we haven't seen more cases of SRM malfunctioning sooner. It's new technology, after all, and the 09 370Z is the first implementation of this new tech. When I got my Z with the sport pkg., part of me felt that I was taking a big gamble getting a car with a brand new feature that isn't on any other cars yet. I have to say that overall I'm very pleased with how well SRM has held up after owning my Z for over a year. But now that we have our first confirmed case of SRM going bad, we'll need to keep a more watchful eye on this, I think.

For some reason, I never even thought of turning off the SRM. I just wanted to quickly see if I could at least stop it, and get a good video for all of us to see. It was a really fun topic of discussion though! The age of cell phone video has worked in a very constructive way! Boy does my Z look great freshly waxed! Stupid Winter. Go away already! Thanks for your kind comments on the Z being all fixed. Should something happen on this subject again, I'd be the first to let you all know... Hopefully with a good video as well.

Modshack · 02-05-2010, 09:57 AM

Quote:

Originally Posted by semtex

why don't you just turn SRM off and see what happens? So does he ever try it? Nope. But personally, I found his attitude downright frustrating and, in light of the confirmation that it was SRM all along, foolish and anything but constructive.

Only 8 suggestions that the OP push the button. We're all glad that this is fixed, but a simple act on the OP's part early in this thread would have been far more constructive for us all.

Quote:

Originally Posted by semtex

To be honest, I'm quite surprised that we haven't seen more cases of SRM malfunctioning sooner.

Based on some of the responses in this thread, there appear to be a fair percentage that are not operating as designed. It should NOT rev in neutral as many report. The OP's final diagnosis indicates the potential sensor problem....

ChrisSlicks · 02-05-2010, 10:09 AM

Quote:

Originally Posted by Modshack

It should NOT rev in neutral as many report.

I beg to differ. The neutral rev is by design, it is designed this way so that the ECU can hit the target RPM's on a quick shift. If the ECU only revved when the shift hit the target gate it would be too late.

Modshack · 02-05-2010, 10:32 AM

Quote:

Originally Posted by ChrisSlicks

I beg to differ. The neutral rev is by design, it is designed this way so that the ECU can hit the target RPM's on a quick shift. If the ECU only revved when the shift hit the target gate it would be too late.

?? This is probably a matter of semantics here, but mine will not rev until the gate sensor is triggered. This is never too late for a matched engagement. Maybe you're shifting at the speed of light...I dunno. Wiggling your stick around in neutral should not trigger a REV as a few have reported and as was ultimately found to be a fault in the OP's car..

Maybe you need to do the Neutral Learning procedure?

3.PERFORM M/T NEUTRAL POSITION LEARNING
Without CONSULT-III
NOTE:
• It is better to count the time accurately with a clock.
• It is impossible to switch the learning mode when a clutch interlock switch circuit has a malfunction.
1. Check that there is no sticking when shifting shift lever to the neutral position.
2. Turn ignition switch ON and wait 5 seconds.
3. Within 5 seconds repeat the following operation 3 times. Fully depress and fully release clutch pedal while
pressing and holding S-MODE switch.
4. Wait 3 seconds while S-MODE switch is released.
5. Wait 5 seconds while pressing S-MODE switch.
6. Wait 3 seconds while S-MODE switch is released.
7. Within 5 seconds repeat the following operation 5 times. Fully depress and fully release clutch pedal while
pressing and holding S-MODE switch.
ECM starts M/T Neutral Position Learning.
NOTE:
Never touch shift lever. Otherwise learning may not complete normally

ChrisSlicks · 02-05-2010, 10:49 AM

Quote:

Originally Posted by Modshack

?? This is probably a matter of semantics here, but mine will not rev until the gate sensor is triggered. This is never too late for a matched engagement. Maybe you're shifting at the speed of light...I dunno. Wiggling your stick around in neutral should not trigger a REV as a few have reported and as was ultimately found to be a fault in the OP's car..

We'll just have to agree to disagree on this one for now.

The service manual doesn't have any description of proper SRM operation. It does however describe a neutral position learning mode.

ChrisSlicks · 02-05-2010, 10:50 AM

Quote:

Originally Posted by Modshack

Maybe you need to do the Neutral Learning procedure?

LOL, actually I think you need to perform the neutral position learning mode because mine works and yours doesn't!

Modshack · 02-05-2010, 11:29 AM

Quote:

Originally Posted by ChrisSlicks

LOL, actually I think you need to perform the neutral position learning mode because mine works and yours doesn't!

LOL...But I don't want mine working the way yours does!....

ChrisSlicks · 02-05-2010, 11:48 AM

Quote:

Originally Posted by Modshack

LOL...But I don't want mine working the way yours does!....

Just wondering if perhaps your sensor could have got knocked out of alignment when you installed your short shifter kit? Just a thought ...

Obviously if you like it the way it is then there is no reason to change.

02-05-2010, 08:35 AM	#1 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 55 Posts: 5,995 Drives: People to drink Rep Power: 34	Btw, TW -- in spite of my admittedly snarky tone above (I haven't had my coffee yet), I am happy for you that you got this fixed. I'm sure it was annoying that your car did what it did, not to mention a little unnerving. In fact, I think this confirmed diagnosis is quite significant in that it's the first confirmed incident of SRM malfunctioning (isn't it?). To be honest, I'm quite surprised that we haven't seen more cases of SRM malfunctioning sooner. It's new technology, after all, and the 09 370Z is the first implementation of this new tech. When I got my Z with the sport pkg., part of me felt that I was taking a big gamble getting a car with a brand new feature that isn't on any other cars yet. I have to say that overall I'm very pleased with how well SRM has held up after owning my Z for over a year. But now that we have our first confirmed case of SRM going bad, we'll need to keep a more watchful eye on this, I think. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

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