Wiring diagrams for transmission and the TCM control module?

Tiny
MIKEWARD30
  • MEMBER
  • 2009 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 175,000 MILES
I need to know what wire is ground for the input shaft speed sensor it goes from transmission to TCM. Please and thank you.
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Saturday, December 12th, 2020 AT 10:51 AM

43 Replies

Tiny
KASEKENNY
  • EXPERT
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
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Saturday, December 12th, 2020 AT 3:37 PM
Tiny
MIKEWARD30
  • MEMBER
Okay, yes this makes perfect sense. I'm getting a p0717 code has been doing it for awhile. How can I go about testing these? I've heard of the reference going bad in the TCM. It's been doing it for awhile sometimes can drive for a hour and it's fine and other times it does it first thing "shifting hard 1-2". Any info would help me. I've got a multimeter.
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Saturday, December 12th, 2020 AT 10:23 PM
Tiny
KASEKENNY
  • EXPERT
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.
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Sunday, December 13th, 2020 AT 4:21 PM
Tiny
BUBR1976
  • MEMBER
  • 2008 CHEVROLET SILVERADO
  • 6.6L
  • V8
  • 4WD
  • AUTOMATIC
  • 239,000 MILES
Can I get the Tcm wiring diagrams please?
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
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.

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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
BUBR1976
  • MEMBER
Thank you I found the connection was bad at the transmision got it fixed.
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
KEN L
  • ADMIN
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
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
BUBR1976
  • MEMBER
Thanks a lot.
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
BUBR1976
  • MEMBER
What should be the voltage/resistance on the low reference wire?
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
The low reference should either 5 or 8 volts. It is not marked but GM uses on 2 references.

Roy
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
BUBR1976
  • MEMBER
Okay, thanks. I found 7.5 volt on the encoder motor but I couldn't find 12 volts.
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
MRFIXIT16
  • MEMBER
  • 2007 CHEVROLET SILVERADO
  • 6.6L
  • V8
  • 4WD
  • AUTOMATIC
  • 300,000 MILES
In search of complete wiring diagram for ECU and TCU controllers. Duramax LMM with Alison transmission. Please help!
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
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
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
MRFIXIT16
  • MEMBER
Does this include the TCM diagrams? Thank you for your quick response!
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
ASEMASTER6371
  • EXPERT
Yes, it does. It contains both the engine and transmission diagrams.

Roy
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
SILVERADOZ712000
  • MEMBER
  • 2000 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 153,000 MILES
Can I get a chevy 4L60E wiring diagram Please?
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
KHLOW2008
  • EXPERT
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)
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
DAVENCAT
  • MEMBER
Where are these fuses and relays located
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Thursday, May 6th, 2021 AT 11:02 AM (Merged)
Tiny
KEN L
  • ADMIN
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)
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Thursday, May 6th, 2021 AT 11:03 AM (Merged)
Tiny
44L60E AGGRIVATION
  • MEMBER
Ok I've had so many problems with this tranny, finally after a oil pump change, I get it stabbed and now no speed o meter and no gear shift. Could I have messed something up in the tranny when changing the pump, cause I ain't gonna lie, I don't know what I'm doing but I wanna do it, but I changed the pump with the tranny laying down. Changed the speed sensors out with old ones but I really don't think the speed sensors are the problem. What else makes it do this? Anything it's helpful. Thanks in advance

I also have a few plugs that I don't know where to plug.
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Thursday, May 6th, 2021 AT 11:03 AM (Merged)

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