Okay, the code is specific to the shift motor. There is no movement in the motor when the relay is activated. I feel confident that the transfer case is stuck in neutral.
With this code, you could have a poor connection at the shift motor, a wiring problem, or the shift motor itself may be bad. Since you indicated it shows the 4wd system is responding, I don't think it's a power issue, but we need to check.
First, I need you to check fuse 17 in the under-hood fuse box. Confirm it's good and has power both to and from it.
Here is a link you may find helpful.
If that checks good, I need you to locate the shift motor on the transfer case. I attached a general pic of what it looks like. (see pic 3) Have a helper switch between 4wd and 2wd to see if there is power at either of the two wires (one yellow and one orange).
If you find there is power and there is no movement in the motor, chances are the motor is bad.
Let me know what you find or if you have questions. The 0% on the torque converter lock-up is normal when at idle.
The last pic below shows the fuse to check in the under-hood fuse box.
Let me know,
Images (Click to enlarge)
Friday, November 19th, 2021 AT 9:43 PM