M35 Tps Troubleshooting

[stealth01]

My Stagea has a random TPS error that triggers limp mode and was hoping someone could point me in the right direction with regards to troubleshooting the problem. This is my first fly by wire car, so TPS issues like this I am foreign to.

From what I understand the M35 Service Manual isn't available in English but the V35/G35 manual is a good reference for this sort of problem.

[PN-Mad]

Best idea would be to try to borrow a working unit from someone, and try that out. If that works, grab one from the wreckers off a V35 / Z33. I think they are the same. But watch out for any unit that has a hole drilled in the plate.

I don't think there are any replaceable parts within the unit itself. But someone will correct me if I am wrong.

[scotty nm35]

I tried to rip a throttle unit apart to clean the TPS carbon tracks but i'm fairly sure it failed. They are definitely not a serviceable part.

Seeing Nissan want $1800 for a new throttle unit and these are failing like hotcakes I would grab any second hand VQ throttle you can get. A 350z/V35 one will fit, I am running a VQ25DD throttle at the moment due to the same fault.

If you need a hand with clearing the codes, resetting the idle or changing the throttle over, a quick search and you will find the information on here. Otherwise PM me if you need someone to do the work for you.

[stealth01]

Thanks for your help guys, I'll try source a VQ throttle and give it a go. $1800 seems abit steep lol, a quick search on Ebay and I've found a "New * GENUINE * Nissan 350Z Maxima Throttle Body" with TPS sensor for sub $250

Edited January 21, 2013 by stealth01

[Daleo]

Thanks for your help guys, I'll try source a VQ throttle and give it a go. $1800 seems abit steep lol, a quick search on Ebay and I've found a "New * GENUINE * Nissan 350Z Maxima Throttle Body" with TPS sensor for sub $250

Post up a link to seller, or is it just a single unit?

[stealth01]

http://www.ebay.com.au/itm/New-GENUINE-Nissan-350Z-Maxima-Murano-Z33-J31-Z50-Throttle-Body-/150895287518?pt=AU_Car_Parts_Accessories&hash=item23220f5cde

Good buy?

Edited January 21, 2013 by stealth01

[scotty nm35]

It looks reasonable, local buy with warranty. Try it out and let us know.

[stealth01]

I spoke with Nissan today and the part numbers for the Z33 TB and the M35 TB are not the same, has anyone used a Z33 TB? I just want to confirm that it is usable on an M35

[scotty nm35]

Same part. I have used early Z33 and M35 direct injection.

[iamhe77]

Yes, whilst I didn't have a Z33 TB, my old VQ25det Stagea had a V35 (VQ35de) throttle body on it without issue.

So between Scott and I, that would mean that 350z, M35 and V35 throttle bodies all fit.

Prossibly J31 Maxima as well although I have not tested this.

[Commsman]

What does the seller mean when he says "For your peace of mind this part comes with a 12 month manufacturers warranty at least."

...at least?

I reckon he's bought heaps of these at a clearance sale & will swap any faulty ones for as long as he still has stock.

[zei20l]

+1 on Z33 one will fit.

also, are you sure its the throttle? could be the pedal input sensor

[stealth01]

How would I troubleshoot the pedal input sensor? Simply find a replacement and try it out? Any reference voltage readings I should be checking for?

[scotty nm35]

It's more likely to be the throttle body but the pedal could be the issue. As it's just a glitch that causes the limp mode it is very hard to measure voltage or resistance issues, easier to swap the parts out.

[stealth01]

Just to add to this, it seems that when it goes into limp mode, I can turn the car off, tap the pedal input sensor on the pedal afew times, start it up and its fine...

Is the pedal input sensor as interchangeable as the TB seems to be?

[scotty nm35]

Yep, it's a two minute job to get the pedal unit out. Pull the plug and remove the two nuts.

[Daleo]

Has anyone bought one of the TB's in the link?

[stealth01]

I ended up buying one, but my problem seems to resolved itself out and I haven't had to install it yet to test if it works. The part I received is genuine Nissan

[pomnz]

From what I understand the M35 Service Manual isn't available in English but the V35/G35 manual is a good reference for this sort of problem.

Jap manual is on here if you want it, can be good for pics and some use with googly translate.

http://www.skylinesaustralia.com/forums/topic/341609-stagea-workshop-manual/page__hl__manual__st__20

[Daleo]

After an unplug, & plug back in; mine appears to be doing it's job properly again.

Wonder if it'll last.