2010 Tundra: P0717

[kevm14]

I drove to the transfer station mostly in 4hi just to exercise it per the owner's manual. Switched back to 2hi before pulling in. Did my stuff. As I was pulling out I switched back to 4hi and shortly after, I got this:

20260405_090932.jpg

Scanned it and got this:

Screenshot_20260405_092016_Ediag.jpg

Unfortunately I don't see any PIDs to observe what sounds like a transmission sensor. I was able to switch back and forth between 2hi and 4hi after this happened so maybe it's not related to the 4wd at all. The reason I mention that is because a week ago, I drove it to work and got a blinking 4hi/4lo display. No codes though. Did some research and it could be just the switch/controller in the dash. But it hasn't happened since.

[kevm14]

https://www.tundras.com/threads/p0717-c ... ase.54652/

[kevm14]

Unfortunately I don't see any PIDs to observe what sounds like a transmission sensor.

Found the PID.

Tundra turbine speed sensor PID.PNG

Nada

Screenshot_20260405_101048_Ediag.jpg

Also no difference in reading plugged in or unplugged. Probably makes sense to throw a sensor at it before I chase a ghost.

[kevm14]

Looks like it is 89413-0C020.

Discontinued by Toyota according to the site I use but: https://www.rockauto.com/en/moreinfo.ph ... 34&jsn=516

Only $47 for the AISIN.

[kevm14]

Thanks to the factory service manual I was able to find the PID ID for the input shaft speed sensor. It reads zero whether the sensor is unplugged or plugged in.
.
Access looks tight but should be pretty easy.

[kevm14]

Received sensor. I'll put it in when I feel like it.

[kevm14]

Unplugged old sensor, began to remove 10mm bolt. Bolt broke in the transmission case. Of course it did. It actually looked ok so I guess the corrosion was all on the aluminum case around the bolt. Sensor really fought coming out, even with a pry bar. I think it was more transmission case corrosion.

20260411_105950.jpg

20260411_110027.jpg

20260411_115454.jpg

Screenshot_20260411_121112_Ediag.jpg

Had difficulty getting the new one in so I was able to jam a battery terminal cleaner with some WD-40 in the hole and clean a bit. That did help. Got the new sensor in which required multiple tries with some real force. Got everything plugged in and it did fix the issue. I will probably jam some JB Weld in the hole and just jam the old bolt in. There are no threads I can use as it broke off fairly shallow. But I took it around the block at least and it didn't budge so I'm hoping some epoxy will hold it on.

Access is way too tight to drill and extract without dropping the transmission way down.

[kevm14]

JB Welded and jammed the bolt in there. I don't know how much extra holding power there will be but it has to be something. If the transmission goes back into limp mode I guess I'll know what to check.

20260411_111027.jpg

20260411_111039.jpg

20260411_114416.jpg

20260411_121357.jpg