Wiring diagrams for transmission and the TCM control module?

This is a little tricky because there is no direct ground. There is a reference circuit (voltage supply) and then a signal return circuit. Which means the circuit starts and ends at the TCM. The TCM sends the power, the sensor just alters the voltage and sends it back to the TCM.

So the TCM actually grounds the circuit through the TCM ground but the TCM is in between the sensor and the actual ground. The way it knows what speed the input is going is by how fast the voltage is pulsing from around 1.5v up to 3.5v and back and forth with the teeth and gap of the tone wheel on the input shaft.

Does this make sense? Let me know what questions you have. I attached the wiring diagram for your review. Thanks

Okay. That is great. I am attaching below the testing and info for this code. Take a look at this and let me know what questions you have. It is not the easiest testing but should take us to what the issue is for all those issues.

I attached the diagrams I found for the TCM. Let me know if you have any other questions. This guide will help you test the connections.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (Below). Please let us know what happens.

Here is the wiring diagrams for the transmission and the transfer case with a guide to show you how to test the wiring:

https://www.2carpros.com/articles/how-to-check-wiring

Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.

Cheers, Ken

The low reference should either 5 or 8 volts. It is not marked but GM uses on 2 references.

Roy

Good evening,

I attached the wiring diagram for the engine and the transmission below for you to view.

https://www.2carpros.com/articles/how-to-check-wiring

Let us know if you have any other questions.

Roy

Yes, it does. It contains both the engine and transmission diagrams.

Roy

I have found these transmission wiring diagrams for you (below) and a guide to help you do some testing

https://www.2carpros.com/articles/how-to-check-wiring

Please let us know if you need anything else to get the problem fixed. Click the images to enlarge (BELOW)

There seems to be a slight difference according to the vin number of the fuses and locations so I got all of them for you with the fuse locations below. Here are some guides as well to help you with any testing you need to do.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (BELOW)