2010 Murano - Transmission? B2603, P0705, p1700

[iscrni]

Hi All, hoping someone can help.

My wife's 2010 Murano is having intermittent issues, the PRNDL indicator on the dash go blank, looses all acceleration and/or would feel jerky with no power to accelerate, and the I-Key light come on. it seems to happen more commonly after a longer drive and in slower moving traffic but is still random. car can be driven for a week and no issues, then could do it back to back days. No engine lights but when I scanned for codes i got B2603 - Shift position, there was also a pending code P0705 - Transmission range sensor circuit malfunction. the freeze frame data also picked up a P1700 but wasn't in the confirmed or pending codes (I'm assuming it was triggered by the driveability issues the car is having).

A few weeks prior it threw a U1000 (Can_Comm_Circuit) with B2562 (low battery voltage code), C1155 (Brake fluid level) along with the B2603 (shift position), replaced the battery as the other was dead, voltage was low and wasn't holding a charge. since the battery change only the B2603 code has returned, and with the two new codes mentioned in the above paragraph. Also, to rule out the alternator, it seems good - charging at 14+ volts on start up idle and once driving drops to 13.2-13.5.

Everything I've researched might have a similar code but doesn't quite fit the symptoms she is having. and I cant seem to replicate the issue on my test drives, so I'm hoping someone on here can help brainstorm some possibilities.

Also for some more context, 2010 3.5v6 Murano SL AWD - 150k Miles all stock

[VStar650CL]

That sounds like a problem with the the transmission or range sensor wiring. Start by popping both connectors and check for water intrusion. Make sure there isn't water in the IPDM compartment too, all the power for the engine and drivetrain systems goes through it.

[Uright]

Hello all,

So i picked this thread becauae it was about the transmission and for the most part similar issue.

It is throwing the P0705 code as well and i dont know where that is. Supposedly also the nuetral switch / inhibitor switch!? Most videos have the switch next to the cable on top of the trans, unbolt remove and instal the other this one does not!?

I changed the step motor still same issue and the issue is it does engage “R” and does move to “N” and “D” however they dont show on the dash cluster!?

I also notice that when i opened the trans to view what happens when you change gears that the stepper motor rod connector does not move, is it not supposed to move when selecting another gear?

I have read TCM replacement and as long as it is the same part number no programming i believe !?

Thanks for any help.

[VStar650CL]

The Range Switch on '09B trannies is internal, it's part of the Valve Body. See TM-46 here for how to check it:
https://www.nicoclub.com/service-manual ... 0%2FTM.pdf

On the earliest iterations of the CVT's, Nissan didn't want people screwing around with the VB's, so the FSM will tell you to replace the whole transmission. That isn't correct, you'll actually just need a VB.

The stepper only moves when the belt is engaged and a ratio change is called for. When the car is just sitting it's generally in the lowest ratio position for both forward and reverse, so it won't move with the shifter.

[Uright]

Thank you Vstar,

Just for clerty, you are saying the valve body needs to be replaced?

I have read if i detach the memory box and put it on the new/used valve body that it would not need programming correct?

Sucks they put the switch internally, was hoping it was the step motor..but it does have 188k miles..oh well..

[VStar650CL]

Just for clerty, you are saying the valve body needs to be replaced?

If the switch is bad, yes. It's also possible your TCM has s#it the bed or you have broken wires in the harness. VB's are big bucks, diag first and don't be sorry later.

I have read if i detach the memory box and put it on the new/used valve body that it would not need programming correct?

It won't throw codes if you do that (at least not right away), but they often don't work well. The data in the ROM is the calibrations for the valves and solenoids, by swapping ROM's you're causing the TCM to use the data from the old VB to run the new VB. That may or may not be close enough to work right, and may or may not be far out enough to blow things up. Sometimes people do that and the transmission won't even move.

If you have the CVTz50 app, it's easy to do it the right way. Follow the steps on TM-8 of the FSM...
https://www.nicoclub.com/service-manual ... 0%2FTM.pdf
...but where the FSM says, "Select Erase" using the Consult, instead press and hold the "Read/Clear CVT DTC" button using CVTz50.

[Uright]

I neee to do the check.

They have valve bodies on ebay for like 200.ish to 300.00 dollars supposedly plug and play but i understand what you are saying.

The TCM, if i go to the junkyard and grab a same part number would it need programming?

Thanks again for your expertise

[VStar650CL]

You're not getting the concept, let me explain better. The TCM is separate from the transmission. When you "program", what's actually happening is the that the TCM reads the data from the ROM inside the VB and stores a permanent copy in its own memory, which it then uses to run the transmission. If you install a JY VB, it has the same problem as a new one, the values in the TCM won't match the values in the ROM. The calibration procedure is the only way to make those match. That's why when people here install JY trannies, I always urge them to try to get the donor TCM along with the trans. That's the only circumstance where programming wouldn't be needed, because the TCM and VB are already on the same page. You could do the same thing with a JY VB and the matching TCM, but that's the only way.

[Uright]

I got you.

So you are saying if I get a junk yard valve body i need to use that app to potentially program the tcm to it?

Or I could just get both the tcu and valve body and plug and play.

In the end is there anyway way of knowing what is good if i pull them or no it is a gamble!?

Thank you for your patience and knowledge.

[VStar650CL]

So you are saying if I get a junk yard valve body i need to use that app to potentially program the tcm to it?

Or I could just get both the tcu and valve body and plug and play.

Correct.

In the end is there anyway way of knowing what is good if i pull them or no it is a gamble!?

Yes. Plug the donor TCM into your car in place of your existing one and see if it has codes. That will tell you if the donor trans was healthy when scrapped. However, be aware that scrapyards don't generally tear up healthy trannies, they sell them. The odds of finding a healthy VB from a trashed transmission are pretty slim. CVTz50 and a VP11 dongle will set you back $30. I'd suggest you don't fight it and do it right.

[Uright]

Thank you again.

So i think i misunderstood a previous reapinse, i can just het the TCM from the junkyard, the app and dongle no valve body and I can win?

How its comfusing is that the “range switch” physically lives in the valve body and ao then one assumes to change that first and but you recommending is what i am saying in the first sentence?

Not sure where you are from, send me your nnmber becauae text will be alot easier then this forum. So many pop ups etc..

[VStar650CL]

No, you need a VB if the switch is bad, not a TCM. The TCM needs to be loaded with the information from the VB, otherwise it can't work right. I.e., the data in the TCM and the data in the ROM must be identical. Whether you accomplish that by buying a junkyard set which already matches or using CVTz50 to reload the TCM is irrelevant. They just need to match.

[Uright]

No, you need a VB if the switch is bad, not a TCM. The TCM needs to be loaded with the information from the VB, otherwise it can't work right. I.e., the data in the TCM and the data in the ROM must be identical. Whether you accomplish that by buying a junkyard set which already matches or using CVTz50 to reload the TCM is irrelevant. They just need to match.

Ok is it safe to assume that since it is not displaying “N” or “D” and soon as i physically move the shifter into “N” or “D” i do feel it engage but when i put it back to “P” in the cluster the “p” dissapears but if I turn the car off and on it the “P” shows up but also that the same code is there.

Is it safe to say it is the valve body?

[Uright]

Interesting I am in Maryland and we have LKQ, which is national I believe and so there were 3 Murano’s two had the had the trans and ecu but almost the same miles as mine then another had been wrecked so you could maybe assume that since it been wrecked that the trans was working or maybe that is why it was wrecked..haha dont know..but the trans was gone but not the TCU so if they resel the trans then they definitly either pull that ROM from the trans and put it on their new trans or they have to do the app deal!?

[VStar650CL]

We reload TCM's all the time for people who don't have the equipment and don't know about CVTz50. That's what most people do, they take it to the dealer.

[Uright]

Haha..so you are telling me to take my current situation to the dealer..current TCM and current valve body and they will reset TCM i guess make it work?

I get that but alot of folks dont trust dealers but they are not honest with their diagnosises.

Please send me a link if you can so i can review the app and dongle becauae i tried to find it.

[VStar650CL]

The dongle I use is the VeePeak VP11, it's the cheapest one I know about which works correctly for all the CVTz50 functions (not all of them do):
https://www.ebay.com/itm/126251160755

You can download CVTz50 from the Google Playstore:
https://play.google.com/store/apps/deta ... n_US&pli=1

[Uright]

So i an xtool scanner i guess i cant do anything with that?

I have an iphone so that is why i was not finding I guess.

[VStar650CL]

One of my customers said he got it to work fine with a 'droid emulator, but I don't remember which one he used. I think he used Andy, but don't hold me to it.

[Uright]

So i think I have decided to take it to the Nissan Dealer so they can put their equipment on it and give me a proper diagnosis hopefully.

Do you think it is a simple as updating software with what i currently have or are they going to try and sell me a new valve body?

[VStar650CL]

You're not getting this. It is NOT a software problem. It's most likely a bad VB, but it could be wiring or (remotely) a bad TCM. IF you happen to need a new VB or new TCM, THEN you need to conform the data. Unless some hardware is changed, there's nothing to conform. Please read, this isn't rocket science.

[Uright]

Vstar, that is what I was I meant because I am not confident to distinguish between the TCM and Valve Body and that is what i was hoping Nissan could tell me.

I dont know the science behind it but it would have been great if they simply made the range/inhibtor switch where the rest are, on top the transmission shell, so for you with your knowledge it is not rocket science but for others who dont have your experience it is not so easy to dig out.

Sorry i have frustrated you and thanks for what information you have offered so far.

[VStar650CL]

Follow the instructions for P0705 in that link I gave you. That will eliminate wiring and the switch if they're both good, which only leaves the TCM. The TCM is separate from the transmission, it's located on a bracket next to the battery. The ECM is there too, you can distinguish them because the TCM has only one connector, the ECM has three. See TM-11 here for where all the transmission parts are located:
https://www.nicoclub.com/service-manual ... 0%2FTM.pdf

I'd be very afraid of taking it to a dealer, on a car that age most places will shrug and sell you a transmission. Very few dealerships have folks like me who aren't afraid of electricity.