Code showing no connection or signal going to the TCM?

Tiny
SHERRYSUE91
  • MEMBER
  • 1997 DODGE CARAVAN
  • 3.8L
  • V6
  • AUTOMATIC
  • 160,000 MILES
After we replaced the solenoid pack, we have a code showing no connection or signal going to the TCM. We are being told it needs to be replaced. Also, since replacing the solenoid pack the van only shifts a few times then gets stuck in high gear so would replacing the TCM fix this issue? Thanks!
Wednesday, December 27th, 2023 AT 12:08 PM

11 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,788 POSTS
It should, the TCM on these vehicles had problems and go out often. But first let check the fuse# 2, 10, 12 and PTC CB 10 in the fuse panel on the left side of the dash. Also check the fuse 10, 14 or 15 in the fuse panel under the hood, also there is a transmission control relay in the same fuse panel I would swap out as well.

Here is a guide to help and the fuse and relay locations in the images below:

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

Check out the images (below). Please let us know what happens.
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Wednesday, December 27th, 2023 AT 5:58 PM
Tiny
SHERRYSUE91
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  • 20 POSTS
I will let him know. He said he checked all the fuses and switched that relay out with another one to test it and it worked fine, but I will tell him about this and show him. Also, does this mean the TCM was going out all along even though it shifted before replacing the solenoid? My Husband said it didn't always engage right but it did shift. Thank you!
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Wednesday, December 27th, 2023 AT 6:01 PM
Tiny
KEN L
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That would be great, we want to get this problem fixed for you.
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Thursday, December 28th, 2023 AT 10:40 AM
Tiny
SHERRYSUE91
  • MEMBER
  • 20 POSTS
Thank you! We just bought this van, so we really need to get it fixed. I will update you on this.
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Thursday, December 28th, 2023 AT 11:02 AM
Tiny
SHERRYSUE91
  • MEMBER
  • 20 POSTS
Also, do you think the TCM was going out before we changed the solenoid pack even though it shifted before? We had only driven it a few times.
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Thursday, December 28th, 2023 AT 12:02 PM
Tiny
KEN L
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It could be, I have seen many TCM replacements on these vehicles. Please let me know what happens and have a happy new year!
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Friday, December 29th, 2023 AT 10:24 AM
Tiny
SHERRYSUE91
  • MEMBER
  • 20 POSTS
Thank you. He should be putting it in tomorrow. Happy New Year!
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Friday, December 29th, 2023 AT 11:35 AM
Tiny
KEN L
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You are welcome :)
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Saturday, December 30th, 2023 AT 11:31 AM
Tiny
SHERRYSUE91
  • MEMBER
  • 20 POSTS
We got it put in and he said it was back to normal on shifting and everything! Thank you so much for your advice! Also, I will start a new post on the cluster not working. He is also in the process now of changing the gasket on the transmission. We will have it back in around a week or two.
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Sunday, December 31st, 2023 AT 6:58 AM
Tiny
KEN L
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Glad you could get it fixed, thanks for letting us know. Please use 2CarPros anytime we are here to help.
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Sunday, December 31st, 2023 AT 1:54 PM
Tiny
SHERRYSUE91
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You are very welcome!
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Sunday, December 31st, 2023 AT 2:07 PM

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