Nissan NERS programming

Timothy Owner/Technician Wisconsin Posted   Latest  
Resolved
Programming
2008 Nissan Rogue S 2.5L (QR25DE) — JN8AS58V78W129295
Tcm Calibration

I was called in to program this vehicle. Shop had just installed a Nissan New CVT. Wanted it programmed as the trans wasn't shifting.

I said, “OK”. The issue, is that the ID number from the TCM, is a later calibration than is available at Nissan techinfo, so, there's nothing to download. The number I read out of the TCM: 31036-JM39C, and the number available is 31036-JM39B…

I did, just for S&Gs, try to initialize the CVT, but it didn't complete…

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Interesting
Paul Owner/Technician
California
Paul
 

As far as I can tell 31036-JM39C is the current version. If you enter 31036-JM39B into Nissan Techinfo, it gives you 31036-JM39C to download and install. Maybe there's another reason the learning isn't completing?

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Timothy Owner/Technician
Wisconsin
Timothy
 

If you try to use the ‘B’ version, it errors out, stating that the version in the TCM (the ‘C’ version) is the latest and greatest, and sends you back to no file is available…

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Paul Owner/Technician
California
Paul
 

It looks like there's a chicken dance that goes along with the scan tool initialization command. I've attached a couple of images in case you hadn't seen it.

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Timothy Owner/Technician
Wisconsin
Timothy
 

I've seen it many times before. Lots of Nissans just need initialization. Done quite a few. What I've not seen before, is the CVT not shifting, and the engine RPM limited after a new CVT from Nissan was installed.

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Paul Owner/Technician
California
Paul
 

Did the calibration data change after the initialization, or did it remain the same?

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Timothy Owner/Technician
Wisconsin
Timothy
 

After checking back with the shop, I found that they only replaced the CVT, NOT the TCM, so initialization is not necessary, and the TCM already has calibration and files that are already loaded in the car. Explains a few things… What is strange (and what they were trying to cure), is that the car will not accelerate beyond about 1750 RPMs (it's very exact), and when it hits that RPM level, it…

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Paul Owner/Technician
California
Paul
   

Hi Timothy, If they replaced the CVT, but didn't replace the TCM, then programing isn't necessary, but initialization is necessary. The old TCM has data learned from the controlling the old CVT, and now it's trying to control the new CVT with the old information. If it were driven long enough, it might eventually learn to control the replacement CVT, but it might ruin it in the process. We once…

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Jared Diagnostician
Maryland
Jared
 

If it didnt complete, then why? Im assuming you did the KOEO in R with foot partially on accelerator pedal, clear DTCs routine. Do you see a P on the dash for PRNDL display? If a ROM is not communicating with TCM, it cannot transfer over data, and PRNDL will not display park and neutral ranges. I have had a few remans that i have had to put new valve bodies on for no ROM comm.

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Timothy Owner/Technician
Wisconsin
Timothy
 

The PRNDL is normal, displaying the gears in the correct order, and position.

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Brandon Technician
New York
Brandon
 

The calibration data was cleared and the TCM can't reinitialize to the ROM assembly inside the valve body. It probably slams into gear also I'm guessing. Most likely cause is a bad pin fit at cvt or tcm connector. Check calibration data.

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Timothy Owner/Technician
Wisconsin
Timothy
 

Does not slam into gear at all, just won't accelerate beyond about 2K, and will not shift. Almost appears that its against a ‘limiter’ of some kind. Haven't truly experienced anything quite like it. Shop states that it was OK with previous trans installed, just slipping a lot, hence the replacement with new from Nissan.

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Timothy Owner/Technician
Wisconsin
Timothy Resolution
 

Vehicle is not repaired. With the research that I've done, and in talking to Nissan (what fun!), this transmission does not need programmed, though it does need initialized, unless it comes with a DVD/CD. This one did not, so it appears that the transmission has an issue. Apparently the previous transmission just had a bearing noise but shifted fine. Replacement does no shifting. Should attempt…

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