370z roof won't move warning light on

TehDesolate

Just for the record (since I've been reading this thread for the last week), I'm having similar issues as jkatt with my 2011 370Z Roadster. Regardless of the direction (open/close), the roof stops halfway through the process (Page 20, stops at CL-4 of Factory Service Manual - RF) and I have to manually close/open the roof. Greatly appreciate everyone's input and all of the resources on this thread. I'm gonna try some of the fixes (OBD DTC codes, fuses, chaffed wires) that worked here and see if I can get my roof fixed... It's such a tragedy that a fine car as the 370Z has these issues. I'll update sometime later this week with what I find.

TehDesolate

Turns out it was a pair of chaffed wires that was causing a short in the wiring harness. I was able to splice in some extra wire to repair it, but now the roof pauses about 1' up when I try to open it.

It'll open fully when given an encouraging nudge... Here goes another weekend.

OldGuyFla

Sounds like you are making headway. Good luck!

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jkatt

just happened this weekend, top hydraulics are shot and have leaked, new kit plus labor is $9,100 from Nissan, how cute!!!!

OldGuyFla

Sorry to hear the new problems. Have you talked to Klaus at TopHydraulics? He usually can help with all things hydraulic.
Good luck, please keep us updated.

Dan

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Bummer

Seems to me if you get it from Nissan you will have the same thing you have now. Not a good thing at that price.

From the sound of things Top Hydraulics will rebuild the cylinders with better seals. If it were mine I'd send them to TH and rebuild it with better than new, probably one or two at a time until they're all done.

As always YMMV and all that.

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Steve

k4mik4ze

Hey guys,

readed the whole topic and have a problm as well. At the beginning there was no trouble to open the roof but sometimes during closing is stucks befor the back has starts to get closed (see video)
https://streamable.com/4h1id

But when i supported the roof at this point by hands it worked. Then sometimes the same happend during opening. Now the roof is not coming out more then 20 cm of the box then it falls back. After 2-3 seconds i can try it again but still the same. The pump is working until this moment and more or less operating fine.
I‘ve tried to block the roof befor the issue to check if there is a problem with the weight but its working fine as long as i hold it. But when i release its still just going to the same point.

I hope someone can help me.
Best regards from germany

k4mik4ze

We found out that it was a wire from the upper left sensor.

KenB

Any chance you could tell us more about how you found this out? Thanks

Spoiler

Glad you got it solved.

gbhrps

KenB,

There are 8 small hydraulic rams in the top mechanism. Each one has a sail switch (read position switch) at its two positions, fully extended and fulled retracted. They tell the top computer when the ram has reached either end of its travel, the computer reads the info, and then starts its next part of the open/close operation.

In K4mik4ze's case, they discovered a broken/frayed wire at one of the sensor connections on the ram and corrected it.

Sadly, if the sensor had been at fault and needed replacing, since Nissan does not sell rams or sail switches as individual parts ... the only solution would have been to replace the entire top mechanism, .... to the tune of upwards of $12 000 dollars.

Its crazy expensive, but it makes more sense from Nissan's point of view to replace an entire top, motor, computer, cloth, frame and hydraulic system as a one piece item, to ensure a one time fix with no call backs. Its sort of like ... they'll replace a sticking brake caliper with a new one, rather than take the old on apart, clean it up, lube it, install new seals and reinstall it.

They make more money on the parts, hopefully spend less time on labour, and should have less call backs and complaints.

Spoiler

Sad but true...

k4mik4ze

We checked the power on each line (at the plug) and on the left there was nothing. Then we replaced the Wire. Is not so hard, but you need support and maybe 2 hours to fix it. Usually the sensors does not fault because is a pretty simple one.

Basically there is 12V on the line, when the system faults, then there is still a 2-3 Volt check signal. Hope it helps. In the most cases it´s a part of the harness.

I would say there is a pretty simple way to check if its a mechanical or electrical fault.
When the system has a failure, the roof is absolutely not operating.
That means, there is no signal when you pushing the button etc.
Thats also the reason why i was so sure to check the electronic first.
Because at the beginning of the problem i started to disconnect single sensors,
and the symptom was exactly the same like after my broke wire.

Maybe it´s a safety feature of the ECU to stop everything until every of the wires gives a 12V signal back.
So if the roof it´s operating just at the beginnen or something else it could be that the wire has connection in this position but loses it during the movement. Good way to check this, put the root manually to the service position and look if you get a feedback when you pushing the button.

I hope it helped a bit, good luck!

Spoiler

Appreciate the details. This may help someone if a problem pops up

Thanks,

Spoiler

gbhrps

k4mik4ze,

Thank you for the follow up! Its going to help someone. maybe even me, down the road.

Not every fix is $12 000.